Siderophiles in the Brachina meteorite - Impact melting

Details Siderophiles in the Brachina meteorite - Impact melting Siderophiles in the Brachina meteorite - Impact melting

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982natur.299..805r&link_type=abstract

Nature, vol. 299, Oct. 28, 1982, p. 805-807.

Other

7

Abundance, Impact Melts, Mass Ratios, Meteoritic Composition, Oxygen Isotopes, Basalt, Igneous Rocks, Iron Meteorites, Mars Surface

Scientific paper

Oxygen isotope ratios, siderophile abundances, and siderophile ratios for the Brachina meteorite (a chassignite) are compared with data reported for various chassignites, shergottites, nakhlites, pallasites, iron meteorites, chondrites, lunar low-Ti basalts, and terrestrial basalts. The results show that Brachina is different in origin from other shergottites, nakhlites, and chassignites. It is suggested that all the chassignites, shergottites, and nakhlites could have formed on Mars in an impact event about 180 million yr ago and that Brachina may have been ejected from Mars as a large tektitelike impact-melt blob consisting of Chassigny-like target material and a small amount of Eagle Station trio-like pallasite material.

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