Petrology of the ALH-77003 chondrite (C3)

Details Petrology of the ALH-77003 chondrite (C3) Petrology of the ALH-77003 chondrite (C3)

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982polre..25...34i&link_type=abstract

(Symposium on Antarctic Meteorites, 7th, Tokyo, Japan, Feb. 19, 20, 1982) National Institute of Polar Research, Memoirs, Special

Computer Science

2

Meteorites, Antarctic Meteorites, Alh Meteorites, Alha77003, Chondrites, Petrology, Stony Meteorites, Samples, Meteorite, Laboratory Studies

Scientific paper

The ALH-77003 chondrite (C3) is made up of fine-grained CAI's, amoeboid olivine inclusions, chondrules, devitrified glass fragments, mineral fragments and matrix. Their bulk chemical compositions and the constituent mineral compositions are presented in detail and their origins are discussed. The fine-grained CAI's were formed from the materials rich in fassaitic pyroxenes by reactions with the surrounding gas at low temperatures. Amoeboid olivine inclusions are considered to have a cogenetic relationship with fine-grained CAI's and to have suffered the same reactions as the fine-grained CAI's. FeO-rich chondrules (fSP type), devitrified glass fragments and matrix were formed from the solar nebula condensates at low temperatures whereas MgO-rich chondrules (mIP and mSP) types were formed from high temperature condensates.

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