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	<id>https://marspedia.org/index.php?action=history&amp;feed=atom&amp;title=Origin_of_Mars_and_its_Elemental_Composition</id>
	<title>Origin of Mars and its Elemental Composition - Revision history</title>
	<link rel="self" type="application/atom+xml" href="https://marspedia.org/index.php?action=history&amp;feed=atom&amp;title=Origin_of_Mars_and_its_Elemental_Composition"/>
	<link rel="alternate" type="text/html" href="https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;action=history"/>
	<updated>2026-07-22T23:04:10Z</updated>
	<subtitle>Revision history for this page on the wiki</subtitle>
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	<entry>
		<id>https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=142419&amp;oldid=prev</id>
		<title>RichardWSmith: Improved sentense structure.</title>
		<link rel="alternate" type="text/html" href="https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=142419&amp;oldid=prev"/>
		<updated>2025-01-16T19:16:40Z</updated>

		<summary type="html">&lt;p&gt;Improved sentense structure.&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 20:16, 16 January 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l7&quot;&gt;Line 7:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 7:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;On Earth, most valuable ores were formed with [[Volcano|Vulcanism]] and the [[Rivers on Mars|movements of water]].  Mars had both of these effects for much of its early history, so we have every expectation that valuable ores will be found on Mars.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;On Earth, most valuable ores were formed with [[Volcano|Vulcanism]] and the [[Rivers on Mars|movements of water]].  Mars had both of these effects for much of its early history, so we have every expectation that valuable ores will be found on Mars.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Additionally, Mars seems to not have a highly differentiated core.  More iron loving elements are in Mars&#039; mantle and crust.  This suggests that the platinum group metals, nickel, cobalt, and metals that dissolve easily in iron, will be more common on Mars&#039; crust.  (This is &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;logical&lt;/del&gt;, tho &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;speculative&lt;/del&gt;.)&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Additionally, Mars seems to not have a highly differentiated core.  More iron loving elements are in Mars&#039; mantle and crust.  This suggests that the platinum group metals, nickel, cobalt, and metals that dissolve easily in iron, will be more common on Mars&#039; crust.  (This is &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;speculative&lt;/ins&gt;, tho &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;logical&lt;/ins&gt;.)&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;See [[Radioactive Rarity on Mars]] for a discussion about if radioactives are rarer on Mars than Earth.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;See [[Radioactive Rarity on Mars]] for a discussion about if radioactives are rarer on Mars than Earth.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

&lt;!-- diff cache key marspediaorg_www-mwmars_:diff:1.41:old-142418:rev-142419:php=table --&gt;
&lt;/table&gt;</summary>
		<author><name>RichardWSmith</name></author>
	</entry>
	<entry>
		<id>https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=142418&amp;oldid=prev</id>
		<title>RichardWSmith: Added link.</title>
		<link rel="alternate" type="text/html" href="https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=142418&amp;oldid=prev"/>
		<updated>2025-01-15T21:26:19Z</updated>

		<summary type="html">&lt;p&gt;Added link.&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 22:26, 15 January 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l5&quot;&gt;Line 5:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 5:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Analysis of meteorites known to come from Mars and measurements of elemental composition from probes sent to Mars give us the primary information about the elemental composition of Mars but where these data are incomplete, we can be guided by expectation that the elemental composition of Mars is not very different from that of Earth.  For example [[Fluorine]] has not been discovered in any of its principal ores on Mars, but it is the 13th most abundant element on Earth forming 625 parts per million of the Earth&amp;#039;s crust.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page F-151.&amp;lt;/ref&amp;gt;  If the principal ores are not discovered on Mars, it should still be recoverable from other minerals in which it is widely distributed as a minority constituent.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page B-14&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Analysis of meteorites known to come from Mars and measurements of elemental composition from probes sent to Mars give us the primary information about the elemental composition of Mars but where these data are incomplete, we can be guided by expectation that the elemental composition of Mars is not very different from that of Earth.  For example [[Fluorine]] has not been discovered in any of its principal ores on Mars, but it is the 13th most abundant element on Earth forming 625 parts per million of the Earth&amp;#039;s crust.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page F-151.&amp;lt;/ref&amp;gt;  If the principal ores are not discovered on Mars, it should still be recoverable from other minerals in which it is widely distributed as a minority constituent.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page B-14&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;On Earth, most valuable ores were formed with [[Volcano|Vulcanism]] and the movements of water.  Mars had both of these effects for much of its early history, so we have every expectation that valuable ores will be found on Mars.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;On Earth, most valuable ores were formed with [[Volcano|Vulcanism]] and the &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Rivers on Mars|&lt;/ins&gt;movements of water&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;]]&lt;/ins&gt;.  Mars had both of these effects for much of its early history, so we have every expectation that valuable ores will be found on Mars.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Additionally, Mars seems to not have a highly differentiated core.  More iron loving elements are in Mars&amp;#039; mantle and crust.  This suggests that the platinum group metals, nickel, cobalt, and metals that dissolve easily in iron, will be more common on Mars&amp;#039; crust.  (This is logical, tho speculative.)&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Additionally, Mars seems to not have a highly differentiated core.  More iron loving elements are in Mars&amp;#039; mantle and crust.  This suggests that the platinum group metals, nickel, cobalt, and metals that dissolve easily in iron, will be more common on Mars&amp;#039; crust.  (This is logical, tho speculative.)&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

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&lt;/table&gt;</summary>
		<author><name>RichardWSmith</name></author>
	</entry>
	<entry>
		<id>https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=142417&amp;oldid=prev</id>
		<title>RichardWSmith: Added link.</title>
		<link rel="alternate" type="text/html" href="https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=142417&amp;oldid=prev"/>
		<updated>2025-01-15T21:24:44Z</updated>

		<summary type="html">&lt;p&gt;Added link.&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
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				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 22:24, 15 January 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l5&quot;&gt;Line 5:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 5:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Analysis of meteorites known to come from Mars and measurements of elemental composition from probes sent to Mars give us the primary information about the elemental composition of Mars but where these data are incomplete, we can be guided by expectation that the elemental composition of Mars is not very different from that of Earth.  For example [[Fluorine]] has not been discovered in any of its principal ores on Mars, but it is the 13th most abundant element on Earth forming 625 parts per million of the Earth&amp;#039;s crust.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page F-151.&amp;lt;/ref&amp;gt;  If the principal ores are not discovered on Mars, it should still be recoverable from other minerals in which it is widely distributed as a minority constituent.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page B-14&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Analysis of meteorites known to come from Mars and measurements of elemental composition from probes sent to Mars give us the primary information about the elemental composition of Mars but where these data are incomplete, we can be guided by expectation that the elemental composition of Mars is not very different from that of Earth.  For example [[Fluorine]] has not been discovered in any of its principal ores on Mars, but it is the 13th most abundant element on Earth forming 625 parts per million of the Earth&amp;#039;s crust.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page F-151.&amp;lt;/ref&amp;gt;  If the principal ores are not discovered on Mars, it should still be recoverable from other minerals in which it is widely distributed as a minority constituent.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page B-14&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;On Earth, most valuable ores were formed with Vulcanism and the movements of water.  Mars had both of these effects for much of its early history, so we have every expectation that valuable ores will be found on Mars.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;On Earth, most valuable ores were formed with &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Volcano|&lt;/ins&gt;Vulcanism&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;]] &lt;/ins&gt;and the movements of water.  Mars had both of these effects for much of its early history, so we have every expectation that valuable ores will be found on Mars.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Additionally, Mars seems to not have a highly differentiated core.  More iron loving elements are in Mars&amp;#039; mantle and crust.  This suggests that the platinum group metals, nickel, cobalt, and metals that dissolve easily in iron, will be more common on Mars&amp;#039; crust.  (This is logical, tho speculative.)&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Additionally, Mars seems to not have a highly differentiated core.  More iron loving elements are in Mars&amp;#039; mantle and crust.  This suggests that the platinum group metals, nickel, cobalt, and metals that dissolve easily in iron, will be more common on Mars&amp;#039; crust.  (This is logical, tho speculative.)&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

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&lt;/table&gt;</summary>
		<author><name>RichardWSmith</name></author>
	</entry>
	<entry>
		<id>https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=142416&amp;oldid=prev</id>
		<title>RichardWSmith: Discussed formation of ores on Mars.</title>
		<link rel="alternate" type="text/html" href="https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=142416&amp;oldid=prev"/>
		<updated>2025-01-15T21:23:45Z</updated>

		<summary type="html">&lt;p&gt;Discussed formation of ores on Mars.&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
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				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 22:23, 15 January 2025&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l4&quot;&gt;Line 4:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 4:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Analysis of meteorites known to come from Mars and measurements of elemental composition from probes sent to Mars give us the primary information about the elemental composition of Mars but where these data are incomplete, we can be guided by expectation that the elemental composition of Mars is not very different from that of Earth.  For example [[Fluorine]] has not been discovered in any of its principal ores on Mars, but it is the 13th most abundant element on Earth forming 625 parts per million of the Earth&amp;#039;s crust.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page F-151.&amp;lt;/ref&amp;gt;  If the principal ores are not discovered on Mars, it should still be recoverable from other minerals in which it is widely distributed as a minority constituent.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page B-14&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Analysis of meteorites known to come from Mars and measurements of elemental composition from probes sent to Mars give us the primary information about the elemental composition of Mars but where these data are incomplete, we can be guided by expectation that the elemental composition of Mars is not very different from that of Earth.  For example [[Fluorine]] has not been discovered in any of its principal ores on Mars, but it is the 13th most abundant element on Earth forming 625 parts per million of the Earth&amp;#039;s crust.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page F-151.&amp;lt;/ref&amp;gt;  If the principal ores are not discovered on Mars, it should still be recoverable from other minerals in which it is widely distributed as a minority constituent.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page B-14&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;On Earth, most valuable ores were formed with Vulcanism and the movements of water.  Mars had both of these effects for much of its early history, so we have every expectation that valuable ores will be found on Mars.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Additionally, Mars seems to not have a highly differentiated core.  More iron loving elements are in Mars&#039; mantle and crust.  This suggests that the platinum group metals, nickel, cobalt, and metals that dissolve easily in iron, will be more common on Mars&#039; crust.  (This is logical, tho speculative.)&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;See [[Radioactive Rarity on Mars]] for a discussion about if radioactives are rarer on Mars than Earth.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;See [[Radioactive Rarity on Mars]] for a discussion about if radioactives are rarer on Mars than Earth.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

&lt;!-- diff cache key marspediaorg_www-mwmars_:diff:1.41:old-142170:rev-142416:php=table --&gt;
&lt;/table&gt;</summary>
		<author><name>RichardWSmith</name></author>
	</entry>
	<entry>
		<id>https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=142170&amp;oldid=prev</id>
		<title>RichardWSmith at 22:27, 2 November 2024</title>
		<link rel="alternate" type="text/html" href="https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=142170&amp;oldid=prev"/>
		<updated>2024-11-02T22:27:32Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 23:27, 2 November 2024&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l5&quot;&gt;Line 5:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 5:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Analysis of meteorites known to come from Mars and measurements of elemental composition from probes sent to Mars give us the primary information about the elemental composition of Mars but where these data are incomplete, we can be guided by expectation that the elemental composition of Mars is not very different from that of Earth.  For example [[Fluorine]] has not been discovered in any of its principal ores on Mars, but it is the 13th most abundant element on Earth forming 625 parts per million of the Earth&amp;#039;s crust.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page F-151.&amp;lt;/ref&amp;gt;  If the principal ores are not discovered on Mars, it should still be recoverable from other minerals in which it is widely distributed as a minority constituent.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page B-14&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Analysis of meteorites known to come from Mars and measurements of elemental composition from probes sent to Mars give us the primary information about the elemental composition of Mars but where these data are incomplete, we can be guided by expectation that the elemental composition of Mars is not very different from that of Earth.  For example [[Fluorine]] has not been discovered in any of its principal ores on Mars, but it is the 13th most abundant element on Earth forming 625 parts per million of the Earth&amp;#039;s crust.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page F-151.&amp;lt;/ref&amp;gt;  If the principal ores are not discovered on Mars, it should still be recoverable from other minerals in which it is widely distributed as a minority constituent.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page B-14&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;See [[Radioactive Rarity on Mars]] for a discussion about if &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;radioactive &lt;/del&gt;are rarer on Mars than Earth.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;See [[Radioactive Rarity on Mars]] for a discussion about if &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;radioactives &lt;/ins&gt;are rarer on Mars than Earth.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;See [[Areomorphology]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;See [[Areomorphology]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

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&lt;/table&gt;</summary>
		<author><name>RichardWSmith</name></author>
	</entry>
	<entry>
		<id>https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=142169&amp;oldid=prev</id>
		<title>RichardWSmith at 22:26, 2 November 2024</title>
		<link rel="alternate" type="text/html" href="https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=142169&amp;oldid=prev"/>
		<updated>2024-11-02T22:26:48Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 23:26, 2 November 2024&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l5&quot;&gt;Line 5:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 5:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Analysis of meteorites known to come from Mars and measurements of elemental composition from probes sent to Mars give us the primary information about the elemental composition of Mars but where these data are incomplete, we can be guided by expectation that the elemental composition of Mars is not very different from that of Earth.  For example [[Fluorine]] has not been discovered in any of its principal ores on Mars, but it is the 13th most abundant element on Earth forming 625 parts per million of the Earth&amp;#039;s crust.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page F-151.&amp;lt;/ref&amp;gt;  If the principal ores are not discovered on Mars, it should still be recoverable from other minerals in which it is widely distributed as a minority constituent.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page B-14&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Analysis of meteorites known to come from Mars and measurements of elemental composition from probes sent to Mars give us the primary information about the elemental composition of Mars but where these data are incomplete, we can be guided by expectation that the elemental composition of Mars is not very different from that of Earth.  For example [[Fluorine]] has not been discovered in any of its principal ores on Mars, but it is the 13th most abundant element on Earth forming 625 parts per million of the Earth&amp;#039;s crust.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page F-151.&amp;lt;/ref&amp;gt;  If the principal ores are not discovered on Mars, it should still be recoverable from other minerals in which it is widely distributed as a minority constituent.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page B-14&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;See [[Radioactive &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;rarity &lt;/del&gt;on Mars]] for a discussion about if radioactive are rarer on Mars than Earth.&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;See [[Radioactive &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Rarity &lt;/ins&gt;on Mars]] for a discussion about if radioactive are rarer on Mars than Earth.&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;See [[Areomorphology]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;See [[Areomorphology]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

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&lt;/table&gt;</summary>
		<author><name>RichardWSmith</name></author>
	</entry>
	<entry>
		<id>https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=142168&amp;oldid=prev</id>
		<title>RichardWSmith: Added link.</title>
		<link rel="alternate" type="text/html" href="https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=142168&amp;oldid=prev"/>
		<updated>2024-11-02T22:26:17Z</updated>

		<summary type="html">&lt;p&gt;Added link.&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 23:26, 2 November 2024&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l4&quot;&gt;Line 4:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 4:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;br&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Analysis of meteorites known to come from Mars and measurements of elemental composition from probes sent to Mars give us the primary information about the elemental composition of Mars but where these data are incomplete, we can be guided by expectation that the elemental composition of Mars is not very different from that of Earth.  For example [[Fluorine]] has not been discovered in any of its principal ores on Mars, but it is the 13th most abundant element on Earth forming 625 parts per million of the Earth&amp;#039;s crust.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page F-151.&amp;lt;/ref&amp;gt;  If the principal ores are not discovered on Mars, it should still be recoverable from other minerals in which it is widely distributed as a minority constituent.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page B-14&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Analysis of meteorites known to come from Mars and measurements of elemental composition from probes sent to Mars give us the primary information about the elemental composition of Mars but where these data are incomplete, we can be guided by expectation that the elemental composition of Mars is not very different from that of Earth.  For example [[Fluorine]] has not been discovered in any of its principal ores on Mars, but it is the 13th most abundant element on Earth forming 625 parts per million of the Earth&amp;#039;s crust.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page F-151.&amp;lt;/ref&amp;gt;  If the principal ores are not discovered on Mars, it should still be recoverable from other minerals in which it is widely distributed as a minority constituent.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page B-14&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;See [[Radioactive rarity on Mars]] for a discussion about if radioactive are rarer on Mars than Earth.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;See [[Areomorphology]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;See [[Areomorphology]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

&lt;!-- diff cache key marspediaorg_www-mwmars_:diff:1.41:old-141330:rev-142168:php=table --&gt;
&lt;/table&gt;</summary>
		<author><name>RichardWSmith</name></author>
	</entry>
	<entry>
		<id>https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=141330&amp;oldid=prev</id>
		<title>RichardWSmith: Noted that Mars formed farther from the Sun, so may have started with more volatiles.</title>
		<link rel="alternate" type="text/html" href="https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=141330&amp;oldid=prev"/>
		<updated>2024-08-24T05:39:08Z</updated>

		<summary type="html">&lt;p&gt;Noted that Mars formed farther from the Sun, so may have started with more volatiles.&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
				&lt;col class=&quot;diff-marker&quot; /&gt;
				&lt;col class=&quot;diff-content&quot; /&gt;
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				&lt;col class=&quot;diff-content&quot; /&gt;
				&lt;tr class=&quot;diff-title&quot; lang=&quot;en&quot;&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 06:39, 24 August 2024&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The sun and its planets are thought to have originated from a nebula of gas and dust referred to as the solar nebula.&amp;lt;ref&amp;gt;McGRAW-HILL ENCYCLOPEDIA OF Science &amp;amp; Technology, 8th Edition, (c)1997, volume 16, page 682&amp;lt;/ref&amp;gt;  The gas was hydrogen and helium which formed about 98% of the mass.  The 2% of other elements formed the dust grains that eventually formed the planets.  The stellar core of the sun should have formed in on the order of 300,000 years.  A disk of dust grains rotating about the protosun coagulated into kilometer sized planetesimal in about another 10,000 years.  These bodies in turn accumulated into planets in another 10 to 100 million years in a process that mixed planetesimals from neighboring regions of the rotating disk.   &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The sun and its planets are thought to have originated from a nebula of gas and dust referred to as the solar nebula.&amp;lt;ref&amp;gt;McGRAW-HILL ENCYCLOPEDIA OF Science &amp;amp; Technology, 8th Edition, (c)1997, volume 16, page 682&amp;lt;/ref&amp;gt;  The gas was hydrogen and helium which formed about 98% of the mass.  The 2% of other elements formed the dust grains that eventually formed the planets.  The stellar core of the sun should have formed in on the order of 300,000 years.  A disk of dust grains rotating about the protosun coagulated into kilometer sized planetesimal in about another 10,000 years.  These bodies in turn accumulated into planets in another 10 to 100 million years in a process that mixed planetesimals from neighboring regions of the rotating disk.   &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Since [[Mars]] and Earth formed from the dust in a single nebula from dust grains that formed at not greatly different distances form the proto sun and since planetesimals from neighboring regions mixed in forming these planets, the elemental compositions of Mars and Earth should be similar.  Analysis of meteorites known to come from Mars and measurements of elemental composition from probes sent to Mars give us the primary information about the elemental composition of Mars but where these data are incomplete, we can be guided by expectation that the elemental composition of Mars is not very different from that of Earth.  For example &lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;fluorine &lt;/del&gt;has not been discovered in any of its principal ores on Mars, but it is the 13th most abundant element on Earth forming 625 parts per million of the Earth&#039;s crust.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page F-151.&amp;lt;/ref&amp;gt;  If the principal ores are not discovered on Mars, it should still be recoverable from other minerals in which it is widely distributed as a minority constituent.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page B-14&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Since [[Mars]] and Earth formed from the dust in a single nebula from dust grains that formed at not greatly different distances form the proto sun and since planetesimals from neighboring regions mixed in forming these planets, the elemental compositions of Mars and Earth should be similar.  &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Mars started further from the sun, so it may have formed with a slightly richer mix of volatile elements such as methane and water ice.&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt; &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Analysis of meteorites known to come from Mars and measurements of elemental composition from probes sent to Mars give us the primary information about the elemental composition of Mars but where these data are incomplete, we can be guided by expectation that the elemental composition of Mars is not very different from that of Earth.  For example &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[Fluorine]] &lt;/ins&gt;has not been discovered in any of its principal ores on Mars, but it is the 13th most abundant element on Earth forming 625 parts per million of the Earth&#039;s crust.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page F-151.&amp;lt;/ref&amp;gt;  If the principal ores are not discovered on Mars, it should still be recoverable from other minerals in which it is widely distributed as a minority constituent.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page B-14&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;See [[Areomorphology]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;See [[Areomorphology]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

&lt;!-- diff cache key marspediaorg_www-mwmars_:diff:1.41:old-136753:rev-141330:php=table --&gt;
&lt;/table&gt;</summary>
		<author><name>RichardWSmith</name></author>
	</entry>
	<entry>
		<id>https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=136753&amp;oldid=prev</id>
		<title>Michel Lamontagne at 01:14, 11 November 2020</title>
		<link rel="alternate" type="text/html" href="https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=136753&amp;oldid=prev"/>
		<updated>2020-11-11T01:14:55Z</updated>

		<summary type="html">&lt;p&gt;&lt;/p&gt;
&lt;table style=&quot;background-color: #fff; color: #202122;&quot; data-mw=&quot;interface&quot;&gt;
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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 02:14, 11 November 2020&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l1&quot;&gt;Line 1:&lt;/td&gt;
&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot;&gt;Line 1:&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The sun and its planets are thought to have originated from a nebula of gas and dust referred to as the solar nebula.&amp;lt;ref&amp;gt;McGRAW-HILL ENCYCLOPEDIA OF Science &amp;amp; Technology, 8th Edition, (c)1997, volume 16, page 682&amp;lt;/ref&amp;gt;  The gas was hydrogen and helium which formed about 98% of the mass.  The 2% of other elements formed the dust grains that eventually formed the planets.  The stellar core of the sun should have formed in on the order of 300,000 years.  A disk of dust grains rotating about the protosun coagulated into kilometer sized planetesimal in about another 10,000 years.  These bodies in turn accumulated into planets in another 10 to 100 million years in a process that mixed planetesimals from neighboring regions of the rotating disk.   &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;The sun and its planets are thought to have originated from a nebula of gas and dust referred to as the solar nebula.&amp;lt;ref&amp;gt;McGRAW-HILL ENCYCLOPEDIA OF Science &amp;amp; Technology, 8th Edition, (c)1997, volume 16, page 682&amp;lt;/ref&amp;gt;  The gas was hydrogen and helium which formed about 98% of the mass.  The 2% of other elements formed the dust grains that eventually formed the planets.  The stellar core of the sun should have formed in on the order of 300,000 years.  A disk of dust grains rotating about the protosun coagulated into kilometer sized planetesimal in about another 10,000 years.  These bodies in turn accumulated into planets in another 10 to 100 million years in a process that mixed planetesimals from neighboring regions of the rotating disk.   &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Since Mars and Earth formed from the dust in a single nebula from dust grains that formed at not greatly different distances form the proto sun and since planetesimals from neighboring regions mixed in forming these planets, the elemental compositions of Mars and Earth should be similar.  Analysis of meteorites known to come from Mars and measurements of elemental composition from probes sent to Mars give us the primary information about the elemental composition of Mars but where these data are incomplete, we can be guided by expectation that the elemental composition of Mars is not very different from that of Earth.  For example fluorine has not been discovered in any of its principal ores on Mars, but it is the 13th most abundant element on Earth forming 625 parts per million of the Earth&#039;s crust.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page F-151.&amp;lt;/ref&amp;gt;  If the principal ores are not discovered on Mars, it should still be recoverable from other minerals in which it is widely distributed as a minority constituent.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page B-14&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;Since &lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;[[&lt;/ins&gt;Mars&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;]] &lt;/ins&gt;and Earth formed from the dust in a single nebula from dust grains that formed at not greatly different distances form the proto sun and since planetesimals from neighboring regions mixed in forming these planets, the elemental compositions of Mars and Earth should be similar.  Analysis of meteorites known to come from Mars and measurements of elemental composition from probes sent to Mars give us the primary information about the elemental composition of Mars but where these data are incomplete, we can be guided by expectation that the elemental composition of Mars is not very different from that of Earth.  For example fluorine has not been discovered in any of its principal ores on Mars, but it is the 13th most abundant element on Earth forming 625 parts per million of the Earth&#039;s crust.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page F-151.&amp;lt;/ref&amp;gt;  If the principal ores are not discovered on Mars, it should still be recoverable from other minerals in which it is widely distributed as a minority constituent.&amp;lt;ref&amp;gt;CRC HANDBOOK of CHEMISTRY and PHYSICS, 64th EDITION (C) 1983, page B-14&amp;lt;/ref&amp;gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt; &lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-side-deleted&quot;&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;See [[Areomorphology]]&lt;/ins&gt;&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==References==  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;==References==  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;references/&amp;gt;  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;references /&amp;gt;  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Geologic Processes]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:Geologic Processes]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

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		<author><name>Michel Lamontagne</name></author>
	</entry>
	<entry>
		<id>https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=127187&amp;oldid=prev</id>
		<title>Jburk at 22:29, 17 December 2018</title>
		<link rel="alternate" type="text/html" href="https://marspedia.org/index.php?title=Origin_of_Mars_and_its_Elemental_Composition&amp;diff=127187&amp;oldid=prev"/>
		<updated>2018-12-17T22:29:54Z</updated>

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				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;← Older revision&lt;/td&gt;
				&lt;td colspan=&quot;2&quot; style=&quot;background-color: #fff; color: #202122; text-align: center;&quot;&gt;Revision as of 23:29, 17 December 2018&lt;/td&gt;
				&lt;/tr&gt;&lt;tr&gt;&lt;td colspan=&quot;2&quot; class=&quot;diff-lineno&quot; id=&quot;mw-diff-left-l6&quot;&gt;Line 6:&lt;/td&gt;
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&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;references/&amp;gt;  &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;&amp;lt;references/&amp;gt;  &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot;&gt;&lt;/td&gt;&lt;td style=&quot;background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;   &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;
&lt;tr&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;−&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:&lt;del style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Geology&lt;/del&gt;]]&lt;/div&gt;&lt;/td&gt;&lt;td class=&quot;diff-marker&quot; data-marker=&quot;+&quot;&gt;&lt;/td&gt;&lt;td style=&quot;color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;&quot;&gt;&lt;div&gt;[[Category:&lt;ins style=&quot;font-weight: bold; text-decoration: none;&quot;&gt;Geologic Processes&lt;/ins&gt;]]&lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;

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		<author><name>Jburk</name></author>
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