Petrology of ALH85085 - A chondrite with unique characteristics

Details Petrology of ALH85085 - A chondrite with unique characteristics Petrology of ALH85085 - A chondrite with unique characteristics

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988e%26psl..91...19w&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 91, no. 1-2, Dec. 1988, p. 19-32.

Other

72

Chondrites, Iron Compounds, Nickel Compounds, Petrology, Chemical Composition, Grain Size, Metallicity

Scientific paper

The characteristics of the chondrite ALH85085 are examined. It is found that the chondrules of ALH85085 are 25-75 microns in size. The majority of the chondrules are cryptocrystalline and all of them are volatile depleted. It is shown that the FeNi metal abundance is 40.9 wt pct and the sulfide abundance is 1.1 wt pct. The matrix lumps and bulk composition of ALH85085 are analyzed. The characteristics of ALH85085 are compared with other chondrite groups, showing that it cannot be classified. The possible origin of ALH85085 is analyzed, showing trends similar to those of calculated nebular condensation paths indicating a nebular origin.

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