Basaltic magmatism on the moon - A perspective from volcanic picritic glass beads

Details Basaltic magmatism on the moon - A perspective from volcanic picritic glass beads Basaltic magmatism on the moon - A perspective from volcanic picritic glass beads

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993gecoa..57.4785s&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 57, p. 4785

Computer Science

61

Lunar Composition, Basalt, Magma, Volcanoes, Peridotite, Glass, Planetary Mantles, Rare Earth Elements

Scientific paper

The wide acceptance of basaltic magmas as products of partial fusion of periodotite within planetary mantles causes them to provide valuable insights into the composition, structure, and processes of planetary interiors. Within the collection of lunar samples returned by the Apollo and Luna missions are homogeneous picritic glass beads of volcanic origin which are our closest approximations to primary magmas. Trace-element data are obtained here for these picritic glasses using SIMS techniques. These data and literature isotopic and experimental data on the picritic glasses are placed within the framework of mare basaltic magmatism. Several lines of evidence are discussed which are consistent with the view that these glasses were derived from mantle sources that were compositionally distinct from the sources for crystalline mare basalts. These data also provide circumstantial evidence that suggests that the picritic glasses were derived from a source somewhat more volatile-rich than that of the mare basalts. Several petrogenetic models presented here are suggested by the trace-element characteristics of the picritic glasses.

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