John Divelbiss
3/31/2017 3:33:12 PM |
David... I almost wrote something up earlier today after reading your site this morning on Vermillion. (FYI... I would have given your site credit if I did.) I have a nice little piece of Vermillion and have been trying to follow the latest thoughts on these special silicate rich irons. A new grouplet is exciting. |
Anne Black
3/31/2017 2:56:49 PM |
Thank you! glad you all like it. I knew it was an unusual pallasite, but I am learning how special, today, thanks to the scientific experts here. |
David Weir
3/31/2017 12:32:10 PM |
Gregory et al. (47th LPSC #2393) have determined that Vermillion shares a similar pyroxene composition, mineralogy, O-isotope composition, and REE pattern with Yamato 8451 and Choteau, and they propose that these three pyroxene pallasites be recognized as members of a new pyroxene-pallasite grouplet termed "Vermillion pallasites". |
Jansen Lyons
3/31/2017 9:41:46 AM |
Incredible Anne! I've never seen a pallasite with such fine and small olivine/pyroxene crystals. Cheers! |
MexicoDoug
3/31/2017 8:18:14 AM |
Main Group Pallasites (MG): Most Pallasites;
Eagle Station pallasite Identification = Olivine rich in Calcium & Iron, Metal rich in Iridium vs MG;
Pyroxene Pallasites (Vermillion) = pyroxene in the olivine crystals vs MG and vs. ES.
(==> at least three different sources for these "pallasites")
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Bernd Pauli
3/31/2017 4:29:40 AM |
BOESENBERG J.S. et al. (1995) Pyroxene Pallasites - A New Pallasite Grouplet (Meteoritics 30-5, 1995, 488): Vermillion differs in texture from main group Eagle Station pallasites, and consists of ca. 86 vol% FeNi metal and about 14 vol% silicates. |
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