[meteorite-list] CAI in Tagish Lake?

From: bernd.pauli at paulinet.de <bernd.pauli_at_meteoritecentral.com>
Date: 03 Mar 2007 21:54:51 UT
Message-ID: <DIIE.000000BB000017BE_at_paulinet.de>

A CAI in a carbonaceous chondrite? Comments are welcome!

http://ca.pg.photos.yahoo.com/ph/voltage_contrast/album?.dir=/bd24re2

Hello Charles and List,

A CAI in a carbonaceous chondrite? Where else if not in a carbonaceous
chondrite? CAI's are very common in carbonaceous chondrites and pretty
rare in non-carbonaceous chondrites!

So the problem is probably: Are there CAI's in Tagish Lake? Yes, there are:

1) ZOLENSKY M.E. et al. (2000) Tagish Lake: A special new type two
   carbonaceous chondrite fall (MAPS 35-5, 2000, Suppl., A178-A179):

   "... altered CAIs (up to 2 mm) ... The CAI has the sinuous texture
    typical of CMs, but is almost completely altered to phyllosilicates"

2) Meteoritical Bulletin, No. 84, 2000 August:

    "... a few small chondrules, CAIs, and isolated grains ..."


Best wishes,

Bernd

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Received on Sat 03 Mar 2007 04:54:51 PM PST