[meteorite-list] Cometary meteorites

From: lebofsky at lpl.arizona.edu <lebofsky_at_meteoritecentral.com>
Date: Tue, 23 Nov 2010 14:48:18 -0700 (MST)
Message-ID: <09b6c35a95ba41531b4054b2dc161740.squirrel_at_webmail.lpl.arizona.edu>

Hi:

I have said this to you before that there is about zero evidence that
carbonaceous chondrites are from comets. There is only minimal evidence
that there are hydrated silicates in comets and at least the CI and CM CCs
very much aqueously altered and are consistent with an origin from C, B,
and G (and maybe D) asteroids.

Larry

> Hello Elizabeth, all -
>
> The general informal consensus within the meteorite community has been
> that carbonaceous meteorites are cometary in origin. That being the case,
> a few questions:
> 1) At what compression/temperature will CO2 dissociate into Carbon and
> Oxygen?
> 2) Will Epoxi provide fine spectra data for trace elements such as calcium
> and aluminum? Platinum Group Elements?
>
> E.P. Grondine
> Man and Impact in the Americas
>
>
>
>
>
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Received on Tue 23 Nov 2010 04:48:18 PM PST