Metamorphic history of a large opaque nodule in crystalline eucrite Asuka 881388

Details Metamorphic history of a large opaque nodule in crystalline eucrite Asuka 881388 Metamorphic history of a large opaque nodule in crystalline eucrite Asuka 881388

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28...49a&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. .49.

Computer Science

Nodules, Silicates, Pyroxenes, Crystal Structure, Meteoritic Composition, Ilmenite, Recrystallization, Melting Points

Scientific paper

The fine-grained, crystalline eucrite Asuka (A-) 881388 includes an unusually large sub-rounded opaque nodule with a tail that appears distinct from the silicate phases, which are mainly polygonal pyroxene and plagioclase. The opaque nodule consists of ilmenite, titanian chromite, troilite, and Fe metal. The presence of this isolated large opaque nodule and fine-grained hypidiomorphic silicates suggests that A881388 may have an extremely high-temperature metamorphism, where pyroxene and plagioclase recrystallized, probably in a solid state, while opaque phases with lower melting points than the silicates (later crystallization products) were selectively melted and migrated to form the seemingly independent opaque nodule.

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