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Spinel cataclasites in 15445 and 72435: Petrology and criteria for equilibrium

Show simple item record Baker, Michael B. Herzberg, Claude T.
dc.coverage.spatial Moon 2020-08-05T21:17:24Z 2020-08-05T21:17:24Z 1980
dc.identifier.citation Proc. Lunar Planet. Sci. Conf. 11th (1980), p. 535-553. en
dc.description.abstract Petrologic methods widely used by metamorphic petrologists offer one approach to this problem by enabling depth determinations to be made on certain lunar highland clasts (Herzberg and Baker, 1980). The two fundamental elements of such methods are: establishing the existence of equilibrium among the coexisting phases in the rock, and applying experimentally determined phase equilibria in temperature-pressure-composition space to the natural assemblage. For the spinel cataclasites (plagioclase, olivine, orthopyroxene, pleonaste spinel ± cordierite) phase equilibria and resulting temperatures and pressures of formation are discussed in detail by Herzberg and Baker (1980), along with inferences on the structure of the lunar crust. In this paper we concentrate on the first of the above two elements by presenting petrographic and mineral chemistry data on a new spinel cataclasite from 15445 (clast H), and more extensive data than has previously been available on two clasts in 72435. en
dc.format.extent Pages 535-553
dc.format.mimetype application/pdf
dc.language.iso en en
dc.publisher Pergamon Press en
dc.relation.ispartofseries LPI contribution ; no. 420
dc.subject Lunar petrology en
dc.subject Lunar surface samples en
dc.title Spinel cataclasites in 15445 and 72435: Petrology and criteria for equilibrium en
dc.type Book chapter en

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