Exploring Mt Sharp north of the dunes - Part 1: Beyond Pahrump Hills, Site 45-50, Sol 923-1147, March 12-October 28, 2015 |
Exploring Mt Sharp north of the dunes - Part 1: Beyond Pahrump Hills, Site 45-50, Sol 923-1147, March 12-October 28, 2015 |
Mar 12 2015, 08:38 PM
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#1
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Administrator Group: Admin Posts: 5172 Joined: 4-August 05 From: Pasadena, CA, USA, Earth Member No.: 454 |
Finally drove away from Pahrump Hills on sol 923. Wheel tracks sure are piling up at the end of the drive -- there seems to have been quite a bit of slip.
[admin note: I was going to start a new thread for this, but realized our thread naming may be a bit out of whack because we're really not journeying to Mt Sharp anymore, are we? We'll discuss it with admins and I'll move/rename posts when we figure out our naming schema.] -------------------- My website - My Patreon - @elakdawalla on Twitter - Please support unmannedspaceflight.com by donating here.
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Apr 6 2015, 12:10 AM
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#2
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Senior Member Group: Members Posts: 1054 Joined: 17-February 09 Member No.: 4605 |
Nicely done Paul. A consensus seems to be forming that the veins seen here and at Sheepbed represent hydraulic fracture fill. This indicates that the mudstone must have been covered to depth certainly no less than a kilometre and probably much more. But it also implies that there would be a significant thickness of sediment below the mudstone which compacted to provide the high pressure solution necessary to fracture the mudstone cap and form the fracture fill. This means that the basal unit could be much deeper than suggested by Anderson and Bell in their outstanding landing site selection paper.
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Apr 6 2015, 05:15 AM
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#3
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Senior Member Group: Members Posts: 2431 Joined: 30-January 13 From: Penang, Malaysia. Member No.: 6853 |
... A consensus seems to be forming that the veins seen here and at Sheepbed represent hydraulic fracture fill.... Thanks Serpens. Earlier I was studying the mineral layering in this particular part of the vein and noting the amount of separate mineral veins. I can not even begin to imagine how long these took to form, but now I can begin to appreciate why they decided to return to this location to gather more data before heading towards the mountain once again. |
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