[meteorite-list] One more asteroid type which might shake an old meteorite axom: G-type

From: MEM <mstreman53_at_meteoritecentral.com>
Date: Thu, 7 Apr 2011 19:51:40 -0700 (PDT)
Message-ID: <342565.66636.qm_at_web161903.mail.bf1.yahoo.com>

<http://en.wikipedia.org/wiki/G-type_asteroid>

This includes 1 Ceres and the significance is that the spectral absorption
suggests a composition including clays and phylosilicates--aka "micas". These
mineral classes require free water somewhere in their formation, by the way .
So the old axiom that "mica" is never found in meteorites might need this
potential exception to be taken into consideration next time a candidate
specimen is summarily discarded owing to mica cointent.

Elton
Received on Thu 07 Apr 2011 10:51:40 PM PDT