Sol 90+, Extended mission |
Sol 90+, Extended mission |
Aug 25 2008, 11:46 AM
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Senior Member Group: Admin Posts: 3108 Joined: 21-December 05 From: Canberra, Australia Member No.: 615 |
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Sep 5 2008, 05:48 PM
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#2
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Member Group: Members Posts: 401 Joined: 5-January 07 From: Manchester England Member No.: 1563 |
Gallen 53 could you expand on that for me? What I mean is; what is it about the decomposition of olivine that causes dryness? Or do you mean that the presence of olivine is a sign of extreme dryness?
I'm curious that no thin films form at all when the water vapour, presumably coming from the ice beneath, is rising through the soil. It suggests there is something in the soil repelling the water, either a compound or an electrostatic charge...? -------------------- |
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Sep 5 2008, 06:06 PM
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#3
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Junior Member Group: Members Posts: 96 Joined: 11-February 04 Member No.: 24 |
Gallen 53 could you expand on that for me? What I mean is; what is it about the decomposition of olivine that causes dryness? Or do you mean that the presence of olivine is a sign of extreme dryness? Olivine is an indicator of extreme dryness. Olivine will rapidly decompose (in geological time) in the presence of liquid water. The Martian surface is very old but there is also lots of olivine. Therefore the Martian surface has been very dry for a long time. I didn't know that olivine was common in the Martian soils. But then, I didn't know much of anything about their composition. Could you point me towards a reference that describes their mineralogy? Google is your friend :-) . http://www.psrd.hawaii.edu/Nov03/olivine.html http://www.astrobio.net/news/index.php?nam...p;theme=Printer www.lpi.usra.edu/meetings/lpsc2004/pdf/1043.pdf http://www.marstoday.com/news/viewpr.html?pid=17025 http://en.wikipedia.org/wiki/Olivine |
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Sep 8 2008, 02:23 PM
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#4
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Member Group: Members Posts: 242 Joined: 17-February 04 From: Ohio, USA Member No.: 34 |
Thanks for the links. |
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