ArticlesSpecial Mineral Studies

Mineralogy and Petrology of Coarse Particulate Material from Lunar Surface at Tranquillity Base

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Science  30 Jan 1970:
Vol. 167, Issue 3918, pp. 650-652
DOI: 10.1126/science.167.3918.650

Abstract

Five grams of coarse fines (10085,11) contains 1227 grains, mostly mafic holocrystalline rock fragments, microbreccia, and glass spatter and agglomerates with less abundant anorthosite fragments and regularly shaped glass. The crystalline lithic fragments in the coarse fines and microbreccias represent a closely related suite of gabbroid igneous rocks that have a wider range of modal analyses and textures than seen in the larger crystalline rock samples returned by Apollo 11. Petrographic evidence of shock metamorphism is common, and the abundant glass is almost all shock-produced. None of the glass observed is similar to tektite glass.