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

[Gerald Flaherty]

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
>
>
> ______________________________________________
> Meteorite-list mailing list
> Meteorite-list at meteoritecentral.com
> http://six.pairlist.net/mailman/listinfo/meteorite-list