Geochemical studies of feldspathic fragmental breccias and the nature of North Ray Crater ejecta

Details Geochemical studies of feldspathic fragmental breccias and the nature of North Ray Crater ejecta Geochemical studies of feldspathic fragmental breccias and the nature of North Ray Crater ejecta

Nov 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983lpsc...13..671l&link_type=abstract

In: Lunar and Planetary Science Conference, 13th, Houston, TX, March 15-19, 1982, Proceedings. Part 2. (A83-21281 07-91) Washing

Physics

10

Breccia, Ejecta, Feldspars, Lunar Craters, Lunar Rocks, Chemical Composition, Geochemistry, Igneous Rocks, Kreep, Lunar Geology, Rare Earth Elements

Scientific paper

Wide variations in clast assemblages and bulk compositions are found in the matrix and clasts from feldspathic fragmental breccias by means of major and trace element analyses. The major components are found to be anorthosites, ferroan anorthositic norites, magnesian granulites, feldspathic melt rocks, and very high alumina impact melts. The compositional characteristics of bulk breccias and feldspathic melt rocks are quantitatively modeled as two- to five-component mixtures. Breccia 67455 is unique in consisting entirely of ferroan, KREEP-free components.

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