Mathematics – Logic
Scientific paper
Jan 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996eiaf.conf...27s&link_type=abstract
Workshop on Evolution of Igneous Asteroids: Focus on Vesta and the HED Meterorites, p. 27
Mathematics
Logic
Cooling, Metamorphism (Geology), Thermoluminescence, Cosmochemistry, Meteoritic Composition, Achondrites, Feldspars, Meteorites, Pyroxenes
Scientific paper
Exsolution structures in pyroxene and induced thermoluminescence (TL) data suggest that eucrite and related meteorites have experienced significant levels of metamorphism on their parent bodies. In this respect, they are quite different from otherwise mineralogically and chemically similar lunar samples. Eight petrologic types of eucrite have been defined on the basis of the heterogeneity and presence of exsolution structures in the pyroxenes and TL sensitivity. On the basis of pyroxene compositions and lamellae widths, metamorphic temperatures and cooling rates of, typically, 850 C-900 C and 40 C/104 years have been proposed. Identifying the physical conditions under which metamorphism occurred, and the relative timing of metamorphism and brecciation, would provide insights into the parent body and eucrite history.
Benoit Paul H.
Sears Derek W. G.
Symes Steven J. K.
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