[meteorite-list] Glanggang and Selakopi (two meteorites on one day? or just one?)

From: Marco Langbroek <marco.langbroek_at_meteoritecentral.com>
Date: Thu Apr 22 10:18:29 2004
Message-ID: <005801c2d995$294f42d0$91264451_at_HAL>

Hi all,

I would rather suggest that Glanggang and Selakopi from Indonesia are
fragments of one and the same meteorite, i.e. one fall not two. See below
paper, from the ADS service:

Authors: Fredriksson K. and Peretsman G.S.
title: Glanggang and Selakopi - Two new paired Indonesian chondrites

Abstract: "The Indonesian meteorites Selakopi, and H-5 chondrite, and
Glanggang, a breccia with H-6 fragments in an H-5 chondritic matrix, were
recovered on the same day from sites only 50 km apart. The textures and
compositions of Selakopi and the H-5 portion of Glanggang are very similar,
indicating that they are closely related. The bulk chemistry of the H-6
portion of Glanggang is also very similar to that of the samples mentioned.
It has therefore been concluded that Selakopi and the Glanggang breccia
fragments were derived from the same source area and were probably ejected
at the same time. Minor differences in bulk composition and texture among
the three samples may be attributed to local variations on the parent body.
However, for reasons stipulated in the conclusion, it is recommended that
separate names be maintained for these meteorites until further, more
definitive investigations have been made."

The paper menstions that the major components of the Selakopi breccia are
similar in appearance and chemistry to the matrix of Glangang.

best wishes, Marco

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Drs Marco Langbroek

marco.langbroek_at_wanadoo.nl
meteorites_at_dmsweb.org
http://home.wanadoo.nl/marco.langbroek

"What seest thou else
 In the dark backward and abysm of time?"

                            William Shakespeare
                            The Tempest act I scene 2
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Received on Fri 21 Feb 2003 05:36:35 AM PST