[meteorite-list] Classification of Chondrites

From: Rhett Bourland <rbourlan_at_meteoritecentral.com>
Date: Thu Apr 22 09:50:24 2004
Message-ID: <IOEBKAHMGFBDJMOFGDFNAEKKDIAA.rbourlan_at_evansville.net>

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?
Curiously,
Rhett Bourland
www.asteroidmodels.com
www.asteroidmodels.com/personal
www.meteoritecollectors.org

-----Original Message-----
From: Bernd Pauli HD [mailto:bernd.pauli_at_lehrer1.rz.uni-karlsruhe.de]
Sent: Sunday, April 07, 2002 1:25 PM
To: rbourlan_at_evansville.net
Cc: Fred Olsen; meteorite-list
Subject: Re: [meteorite-list] Classification of Chondrites


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 02:56:10 PM PDT