Petrology of EETA79006 and implications for the formation of polymict eucrites

Details Petrology of EETA79006 and implications for the formation of polymict eucrites Petrology of EETA79006 and implications for the formation of polymict eucrites

Sep 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982metic..17..149s&link_type=abstract

Meteoritics, vol. 17, Sept. 30, 1982, p. 149-162.

Other

11

Achondrites, Basalt, Meteoritic Composition, Petrology, Breccia, Chemical Composition, Feldspars, Impact Melts, Mineralogy, Pyroxenes, Regolith

Scientific paper

A newly found polymict eucrite, EETA79006, is described. Lithic clasts are similar to those found in howardites and fall into four groups: fine-grained (aphanitic), coarse-grained, basaltic, and cataclastic. All have eucritic compositions and differ mainly in cooling and deformation histories. Some basaltic clasts cooled faster than others and may be impact melts. Analysis of pyroxene and feldspar in the matrix and in 20 lithic clasts indicates that the matrix was not derived from the observed lithic clast population. This meteorite and similar polymict eucrites may have formed by addition of younger more fractionated lithic clasts to the regolith of the parent body.

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