[meteorite-list] Quartz in meteorites

From: bernd.pauli at paulinet.de <bernd.pauli_at_meteoritecentral.com>
Date: 06 Feb 2008 09:39:30 UT
Message-ID: <DIIE.000000BA0000268A_at_paulinet.de>

"But in a very few quartz is found"

Here are a few examples:


MONTEIRO J.F. (1989) Preliminary study of the Chaves
howardite (Meteoritics 24-4, 1989, pp. A305-A306):

Quartz and tridymite were observed in thin section and, during electron microprobe
work, many small complex intergrowths between plagioclase and pyroxene crystals
were found to contain very high silica.

RUBIN A.E. (1997) Mineralogy of meteorite groups
(Meteoritics 32-2, 1997, 231-247, p. 241, excerpts):

The basaltic shergottites are fine-grained rocks consisting of ...and accessory fayalite,
quartz, baddeleyite and chlorapatite within the mesostasis (McSween, 1994).

AFANASIEV S.V. et al. (2000) Dhofar 007 and Northwest Africa 011:
Two new eucrites of different types (MAPS 35-5, 2000, Suppl., A019):

Northwest Africa 011 is an unbrecciated achondrite unlike Dhofar 007, with a metagabbroitic
structure consisting of subhedral grains of pigeonite (0.5-0.6 mm) and plagioclase (0.05-0.1 mm).
Accessories are metal, troilite, spinel, ilmenite, and quartz.

(Lunar and Planetary Science XXXIII (2002) 1434.pdf):

A New Shergottite From Oman, Dhofar 378

The oxygen fugacity is consistent with the assemblage of fayalite, quartz, and magnetite.

SEMENENKO V.P. et al. (1998) The Galkiv meteorite: A new H4
chondrite from Ukraine (MAPS 33, 1998, A193-A196):

The meteorite contains ...metallic Cu and rare grains of spinel and quartz.


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Received on Wed 06 Feb 2008 04:39:30 AM PST