[meteorite-list] Classification of Chondrites

From: Bernd Pauli HD <bernd.pauli_at_meteoritecentral.com>
Date: Thu Apr 22 09:50:24 2004
Message-ID: <3CB08F19.422C2C5A_at_lehrer1.rz.uni-karlsruhe.de>

Rhett Bourland wrote:

> What are the fayalite values that determine
> whether a certain meteorite is H, L, or LL?

Hi Rhett and List,

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

Two things should be noted:

1) There is an area of overlap with regard to the H and L chondrites

2) We must be careful with the unequilibrated H3's, L3's and LL3's
    because they usually have a range of values and a peak value.

When you plot the Fa values on a diagram,
the three groups become easily recognizable.


Best wishes,

Bernd
Received on Sun 07 Apr 2002 02:25:29 PM PDT