[meteorite-list] Meteorite Question

From: Bernd Pauli HD <bernd.pauli_at_meteoritecentral.com>
Date: Thu Apr 22 10:00:06 2004
Message-ID: <3D318D55.F9C4A32B_at_lehrer.uni-karlsruhe.de>

Rhett wrote:

> I'm wondering if you have any other information on
> the pyroxene and metal values of some of these.


Hello Rhett and List,

Clipperton may be one of those meteorites about which Pierre
cautioned: "is there systematic bias? (possible for weathered
finds, oxidation of olivine starts by turning Fe to rust there-
fore decreasing Fa%" because it was collected from the ocean
floor and is highly weathered.

Grady (1937), H3.6 has 26.23 % total iron

Moorabie, L3.8:

22.34 % - 22.68 % total iron,
olivine Fa14 (5-20); pyroxene Fs3-29;

Quinyambie, LL3.4:

19.0 % - 19.48 % total iron;
olivine Fa22 (5-35); pyroxene Fs15-30;

Willaroy, H3.5:

25.3 % total iron, olivine Fa15 (10-19);

Xinyi, H5:

26.9 % total iron, olivine Fa15;

QUE 94570: Fa10-13, Fs9-12 but caution (!) - it, too,
was extremely weathered, when it was found.

QUE 94570 was originally classified as a C4 chondrite,
but see:

KALLEMEYN G.W. et al. (1998) Prompt-Gamma Analysis (PGA)
and Instrumental Neutron Activation Analysis (INAA) studies of a
new reduced L chondrite (Meteoritics 33-4, 1998, A081):

"Our analyses show that QUE 94570 is not, in fact, a new member
of the Coolidge-Loongana 001 grouplet, but is rather a new L
chondrite similar to Moorabie and Suwahib Buwah."


Best wishes,

Bernd
Received on Sun 14 Jul 2002 10:40:21 AM PDT