Hi Ruben and List members,
My eyes are calibrated for Lunaites right now having just returned from a
Mojave hunt. I trained my eyes before the deep desert trip in hopes of actually
finding one. After hiking 62 miles last week, I did find a few breccias, some
fossil camel bones, an ordinary chondrite and maybe a weathered carbonaceous
chondrite. We even found a stolen vehicle from Utah stashed in a box canyon
which we reported. The police dispatcher was not ready for exact GPS
coordinates though.
With my eyes still calibrated in hopes of finding a North American Lunar, my
first guess is a Mesosiderite. With that said, I am certainly no expert on
thin-sections but do enjoy observing them. I looked for triple-junctions and
did not see any in the thin-section image so I do not believe it to be anything
primitive like a Winoniate, Lodranite or Acapulcolite. I see no relic
chondrules either. If the opaque areas are metal or oxides and not chromite,
then there seems to be too much for a Diogenite.
That's what makes finds like Ruben's exciting, you do not know what you have
until the minerals are recognized in a laboratory. In any case, it is indeed a
rare find. My blistered feet are testimony to how difficult any meteorite is
to find, congratulations!
Please let us know what the laboratory reports,
Best Regards,
Adam
----- Original Message ----
From: Ruben Garcia <[email protected]>
To: Meteorite List <[email protected]>
Sent: Mon, October 26, 2009 4:02:55 PM
Subject: [meteorite-list] Where are the thin section experts?
Hi all,
The disclaimer: My main purpose for posting this is because I know
very little about achondrite meteorites. This is because (as a general
rule) I only collect what I find, and though I've found lots of
meteorites this is my first achondrite find.
As most already know this find is currently being classified by
Laurence Garvie at ASU. However, while we wait for the official
classification I thought it would be fun and enlightening to show the
section and see if the guesses change from before. It would be great
to hear from some of the great minds on this forum - Ted Bunch, the
Hupe's, etc.. - but any ones guess is welcome and interesting to me.
According to the (4) meteoriticists that have seen the thin section -
it is NOT a pallasite or chondrite. However, no one can definitively
ID this meteorite instead they gave a few guesses - "primitive
achondrite like."
This thin section was pictured with a home made cross polarized light
set-up I made. It’s not the best but I hope it's good enough to give
an idea.
Look here:
http://www.mr-meteorite.net/rubengarciasmeteorite.htm
Meteorite picutres as found/cut and polished
http://www.mr-meteorite.net/ararearizonafind.htm
--
Ruben Garcia (Mr-Meteorite)
Website: http://www.mr-meteorite.net
Articles: http://www.meteorite.com/blog/
Videos: http://www.youtube.com/profile?user=meteorfright#p/u
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