Morphology and composition of condensates on Apollo 17 orange and black glass

Details Morphology and composition of condensates on Apollo 17 orange and black glass Morphology and composition of condensates on Apollo 17 orange and black glass

Dec 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ga17.conf...31m&link_type=abstract

In Lunar Science Inst., Workshop on Geology of the Apollo 17 Landing Site p 31-36 (SEE N93-18786 06-91)

Computer Science

3

Chemical Composition, Condensates, Ejecta, Geochemistry, Geomorphology, Glass, Lunar Geology, Lunar Soil, Volcanoes, Volcanology, Carbon, Chlorine, Core Sampling, Crystallization, Fluorine, Light Elements, Nitrogen, Oxygen, Photomicrographs, Scanning Electron Microscopy, Sulfur, Zinc

Scientific paper

Lunar soil sample 74220 and core samples 74001/2 consist mainly of orange glass droplets, droplet fragments, and their crystallized equivalents. These samples are now generally accepted to be pyroclastic ejecta from early lunar volcanic eruptions. It has been known since early examination of these samples that they contain surface coatings and material rich in volatile condensible phases, including S, Zn, F, Cl, and many volatile metals. The volatiles associated with these orange and black glasses (and the Apollo 15 green glasses) may provide important clues in understanding the differentiation and volcanic history of the Moon. In addition, condensible volatiles can be mobilized and concentrated by volcanic processes. We have reviewed many of our existing photomicrographs and energy dispersive analysis (EDXA) of grain surfaces and have reexamined some of our older SEM mounts using an improved EDXA system capable of light-element detection and analysis (oxygen, nitrogen, and carbon). The results from these investigations are presented.

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