[meteorite-list] Shergotty Thin Section and Tschermak

From: bernd.pauli_at_paulinet.de <bernd.pauli_at_meteoritecentral.com>
Date: Thu Apr 22 10:31:11 2004
Message-ID: <DIIE.0000003400001DBF_at_paulinet.de>

TSCHERMAK G. (1885) Die mikroskopische Beschaffenheit der Meteoriten
(Stuttgart E. Schweizerbart'sche Verlagshandlung, E. Koch, 23 pp.).

English Translation: The Microscopic Properties of Meteorites, Vol. 4,
No. 6 (Smithsonian Contributions to Astrophysics, Washington, D.C., 1964).

Translation by J.A. Wood and E.M. Wood

Figure 12 - Shergotty: eucrite

A uniform mixture of augite and maskelynite. The augite shows no foliated
structure but is sometimes twinned ... It displays no crystal outlines but fills
the space between maskelynite crystals, which are colorless and isotropic.
Most of the maskelynite is in elongated crystals, similar to feldspar. I have
earlier described these crystals as cubic; their terminations often show
right angles in section. All the light areas in figure 12 are maskelynite. The
black grains and specks are magnetite.
Received on Sat 03 Apr 2004 02:13:59 PM PST