Winter campaign at Cook Haven, Sol 3512 - 3599 (December 13, 2013 - March 10, 2014) |
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Winter campaign at Cook Haven, Sol 3512 - 3599 (December 13, 2013 - March 10, 2014) |
 Feb 19 2014, 08:32 PM
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#166
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Member  Group: Members Posts: 507 Joined: 10-September 08 Member No.: 4338  |
Couldn't the manganese be in some form other than manganese iron oxide? For example, permanganate? How would that affect the possible genesis and the formation temperature?
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Feb 19 2014, 09:13 PM
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#167
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Senior Member Group: Members Posts: 1043 Joined: 17-February 09 Member No.: 4605 |
If they state that they identified manganese iron oxide then I think we can accept that that is what it is. Pity the Mossbauer ran out of oomph but they can be pretty definitive in this case using the APXS and visual MI.
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Feb 19 2014, 10:35 PM
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#168
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 Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
I'm well out of my depth here on the mineralogy and happy to defer to more knowledgable posters, but I found a couple of things that may be relevant. First I note that bixbyite is a black mineral whereas the encrustation around the perimeter of Pinnacle Island is light toned (maybe white?), so perhaps we're talking about two different parts of the same rock. On another tack, I came across this: http://www.google.co.uk/url?sa=t&rct=j...ZGU&cad=rja
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Feb 20 2014, 06:40 AM
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#169
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Senior Member Group: Members Posts: 1043 Joined: 17-February 09 Member No.: 4605 |
Ray Arvidson's statement that "The dark red stuff appears to be "iron manganese oxide of some kind," while the surrounding white part "represents some kind of sulphate." Given that Pinnacle Island has a high magnesium content, magnesium sulphate seems a likely contender. Hopefully all will be revealed at the next LSPC.
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Feb 20 2014, 09:10 PM
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#170
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Senior Member Group: Members Posts: 2817 Joined: 22-April 05 From: Ridderkerk, Netherlands Member No.: 353 |
The L0 Panoramic view from Sol 3578-3579-3581.
Jan van Driel
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Feb 24 2014, 12:32 AM
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#171
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 Senior Member Group: Moderator Posts: 3431 Joined: 11-August 04 From: USA Member No.: 98 |
Wish for Opportunity to crush more rocks: granted. 'Sledge Island', Sol 3585
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Feb 27 2014, 10:12 PM
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#172
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 Member Group: Members Posts: 866 Joined: 15-March 05 From: Santa Cruz, CA Member No.: 196 |
crosseye from sol 3587 90-cw rotated MI pair centering on the topmost part of the crush zone highlighted in mhoward's post above.
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Mar 1 2014, 05:05 AM
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#173
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Solar System Cartographer Group: Members Posts: 10146 Joined: 5-April 05 From: Canada Member No.: 227 |
Oops, clumsy! They broke Stuart Island.
http://www.midnightplanets.com/web/MERB/im...8P2545L4M1.html Phil -------------------- ... because the Solar System ain't gonna map itself.
Also to be found posting similar content on https://mastodon.social/@PhilStooke NOTE: everything created by me which I post on UMSF is considered to be in the public domain (NOT CC, public domain) |
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Mar 1 2014, 07:18 AM
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#174
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 Member Group: Members Posts: 399 Joined: 28-August 07 From: San Francisco Member No.: 3511 |
Wow. Oppy does Karate!
-------------------- 'She drove until the wheels fell off...'
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Mar 1 2014, 08:52 AM
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#175
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Senior Member Group: Members Posts: 1043 Joined: 17-February 09 Member No.: 4605 |
Amazingly fragile rocks.
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Mar 1 2014, 03:41 PM
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#176
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Senior Member Group: Moderator Posts: 3431 Joined: 11-August 04 From: USA Member No.: 98 |
QUOTE (Phil Stooke @ Feb 28 2014, 10:05 PM)  Oops, clumsy! They broke Stuart Island. "Nice rocks ya' got here. It'd be a real shame if something 'happened' to them..."
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Mar 1 2014, 06:00 PM
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#177
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 Member Group: Members Posts: 754 Joined: 9-February 07 Member No.: 1700 |
Clouseau strikes again.
"That was a priceless rock!" "Not any more." |
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Mar 1 2014, 08:56 PM
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#178
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 Senior Member Group: Members Posts: 2228 Joined: 1-December 04 From: Marble Falls, Texas, USA Member No.: 116 |
QUOTE (mhoward @ Mar 1 2014, 09:41 AM) "Nice rocks ya' got here. It'd be a real shame if something 'happened' to them..." Hey Boss, you want I should give 'em the clamps? -------------------- ...Tom
I'm not a Space Fan, I'm a Space Exploration Enthusiast. |
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Mar 1 2014, 09:10 PM
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#179
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 Senior Member Group: Members Posts: 3419 Joined: 9-February 04 From: Minneapolis, MN, USA Member No.: 15 |
Tonight on Ethel the Frog, we look at Opportunity's obsession that she is being followed by an enormous indurated breccia named Spiny Norman...
 -the other Doug -------------------- “The trouble ain't that there is too many fools, but that the lightning ain't distributed right.” -Mark Twain
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Mar 3 2014, 09:39 PM
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#180
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Member Group: Members Posts: 866 Joined: 15-March 05 From: Santa Cruz, CA Member No.: 196 |
Oppy: "Aww, it was already cracked and would have fallen apart on its own,
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