[meteorite-list] Classification of Chondrites

From: Matson, Robert <ROBERT.D.MATSON_at_meteoritecentral.com>
Date: Thu Apr 22 09:50:25 2004
Message-ID: <AF564D2B9D91D411B9FE00508BF1C8698E5B70_at_US-Torrance.mail.saic.com>

Hi Rhett and List,

Rhett asked:

> Ok, one other question that I'm sure others are probably
> wondering about as well. What happens when the fayalite
> value falls on 20, 21, or 24? What is the determining
> factor in those situations?

Bernd had earlier written:

> H chondrites usually have Fa14-Fa21.
> L chondrites usually have Fa20-Fa24.
> LL chondrites usually have Fa24-Fa33.

I think the L/LL dividing line should be increased to 25, or
even 25.5. More than 60% of L chondrites from California, for
instance, have fayalite mol % values 25.0 or greater.

Best,
Rob
Received on Mon 08 Apr 2002 01:33:30 PM PDT