[meteorite-list] D'Orbigny, Unusual Angrite, Thin Section Photographs

From: Gerald Flaherty <grf2_at_meteoritecentral.com>
Date: Mon May 16 20:19:13 2005
Message-ID: <013701c55a76$0b6a16f0$2f01a8c0_at_Dell>

MOST BEAUTIFUL MARK!! I FOR ONE WILL PRINT OUT YOUR DESCRIPTION. ANY HELP ON
GETTING A HANDLE ON INTERPRETATION OF THIN SECTIONS IS MOST WELCOME.I'LL
WATCH THIS THREAD IN THE HOPES OF LEARNING MORE. JERRY FLAHERTY IMCA# 1405
----- Original Message -----
From: "MARK BOSTICK" <thebigcollector_at_msn.com>
To: <meteorite-list_at_meteoritecentral.com>
Sent: Wednesday, May 11, 2005 12:32 PM
Subject: [meteorite-list] D'Orbigny, Unusual Angrite, Thin Section
Photographs


> Hello list,
>
> (Forgive me for if any of the following is scientifically wrong, this is
> my observations paired with my at times limited knowledge.)
>
> I recently received a D'Orbigny thin section. Which I have placed several
> photographs of on my web site at the following web page.
>
> http://www.meteoritearticles.com/coldorbigneyts.html
>
> One the best thin sections I have. OK, move over NWA 998, it is the best.
> This is due to its prismatic augite crystals, often found twisted with
> olivine, randomly placed anorthite shards, and the many large vugs/vug
> inclusions, in the stone. Some of these are filled with olivine or glass,
> some are empty and some are hollow, meaning the show traces of the former.
> In one vug on my thin section, is a well formed specter shaped crystal
> sticking out. In my microscope it appears bright red, so perhaps it is
> olivine. Another interesting note on the crystal that it formed in a
> hollow vug. Meaning in a vug that has traces of the former minerals that
> once filled the vug. This would mean of course that it formed after
> whatever was in the vug, which is most likely olivine. This is all my
> amateur observation and if anyone thinks the crystal, seen in photo 7, is
> not olivine, let me know your opinion please. Also photo 7 and photo 11,
> shows particle bugs with, under cross polars, appears brown as shown. This
> is what I think are hollow vugs, as described in a couple of papers. The
> former mineral thing again. Empty vug walls are shown in photos 7 and 8.
>
> Opinions and thoughts welcomed,
>
> Clear Skies,
> Mark Bostick
> Wichita, Kansas
> http://www.meteoritearticles.com
> http://www.kansasmeteoritesociety.com
> http://www.imca.cc
>
> http://stores.ebay.com/meteoritearticles
>
>
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Received on Mon 16 May 2005 08:19:08 PM PDT