[meteorite-list] Dhofar 008 - highly unequilibrated chondrite

From: moni waiblinger-seabridge <moni2555_at_meteoritecentral.com>
Date: Thu Apr 22 10:32:47 2004
Message-ID: <BAY14-F13408LE5Ozqw0001f4d2_at_hotmail.com>

WELCOME BACK BERND!! :-)))

Sternengruss, Moni


>From: bernd.pauli_at_paulinet.de
>To: Meteorite-list_at_meteoritecentral.com
>Subject: [meteorite-list] Dhofar 008 - highly unequilibrated chondrite
>Date: 09 Mar 2004 07:41:53 UT
>
>Stan wrote:
>
> > Does anyone have any more information about Dho 008?
> > The Cometshop guys have been selling it as an L3.2,
> > however I have seen reference to it as an H/L. Any further
> > insight would be appreciated ...
>
>Dhofar 008 has a weathering grade of W2 and a shock stage
>of 3. So far so good. But now the problems really start :
>
>a) the average chondrule diameter puts it in the low range
>of average chondrule sizes for the L group;
>
>b) Fa content of olivine varies in a wide range from 1.3-50.4
>proof of its being (highly unequilibrated);
>
>c) The average Fa and Fs values are in the range for H chondrites (!);
>
>d) The range of Co contents in kamacite includes the ranges for H
>and L chondrites;
>
>e) Bulk chemical composition show that it has the typical
>characteristics of L group chondrites;
>
>f) Oxygen isotopic compositions are almost in the range
>of LL chondrites;
>
>g) Oxygen isotopic compositions resemble those for Tieschitz (H/L);
>
>The authors conclude that the meteorite:
>
>(a) corresponds to petrological type 3.2/3.3;
>(b) may contain material from several different reservoirs.
>
>
>Best regards,
>
>Bernd
>
>
>Reference:
>
>IVANOVA M.A. et al. (2001) Geochemical and thermoluminescence
>studies of Dhofar 008, a L3.2/3.3 chondrite (MAPS 36-9, 2001, A088).
>
>
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Received on Tue 09 Mar 2004 09:37:33 AM PST