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1976•Revista Brasileira de GeociênciasOpen access

STUDIES OF BRAZILIAN METEORITES. II. THE AVANHANDAVA CHONDRITE: MINERALOGY, PETROLOGY AND CHEMISTRY

W H Paar, GOMES C.B., E. Jarosewich

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Abstract

A description of the Avanhandava, State of São Paulo, Brazil, meteorite, which fell in 1952, is given using optical, microprobe, and bulk chemical data. This H-group or olivine-bronzite chondrite contains olivine (Fa 17.3 ), bronzite (Fs 16.5 ) diopside (Wo 45.3 En 49.0 Fs 5.7 ), oligoclase (Or 5.4 Ab 84.1 An 10.4 ) whitlockite, chlorapatite, kamacite, taenite (plessite), troilite, chromite, native copper, pentlandite, ilmenite, bravoite, mackinawite, and chalcopyrrhotite. On the basis of mineral and bulk compositions as well as its texture, the Avanhandava meteorite is classified as an H4 chondrite.

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A description of the Avanhandava, State of São Paulo, Brazil, meteorite, which fell in 1952, is given using optical, microprobe, and bulk chemical data. This H-group or olivine-bronzite chondrite contains olivine (Fa 17.3 ), bronzite (Fs 16.5 ) diopside (Wo 45.3 En 49.0 Fs 5.7 ), oligoclase (Or 5.4 Ab 84.1 An 10.4 ) whitlockite, chlorapatite, kamacite, taenite (plessite), troilite, chromite, native copper, pentlandite, ilmenite, bravoite, mackinawite, and chalcopyrrhotite. On the basis of mineral and bulk compositions as well as its texture, the Avanhandava meteorite is classified as an H4 chondrite.

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Available abstract

A description of the Avanhandava, State of São Paulo, Brazil, meteorite, which fell in 1952, is given using optical, microprobe, and bulk chemical data. This H-group or olivine-bronzite chondrite contains olivine (Fa 17.3 ), bronzite (Fs 16.5 ) diopside (Wo 45.3 En 49.0 Fs 5.7 ), oligoclase (Or 5.4 Ab 84.1 An 10.4 ) whitlockite, chlorapatite, kamacite, taenite (plessite), troilite, chromite, native copper, pentlandite, ilmenite, bravoite, mackinawite, and chalcopyrrhotite. On the basis of mineral and bulk compositions as well as its texture, the Avanhandava meteorite is classified as an H4 chondrite.

Key concepts: Troilite, Chondrite, Meteorite, Geology, Kamacite, Chromite, Geochemistry, Olivine

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