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Gabbros from Mare Crisium: An analysis of the Luna 24 soil

1977; American Geophysical Union; Volume: 4; Issue: 10 Linguagem: Inglês

10.1029/gl004i010p00493

1944-8007

A. E. Bence, T. L. Grove, T. A. Scambos,

Geology and Paleoclimatology Research

Monomineralic and lithic fragments from the Luna 24 drill core are samples of a mare ferrogabbro and a rarer gabbro of possible highlands origin. Mineral phase chemistries of the mare ferrogabbro suggest the crystallization near the lunar surface of an evolved Fe‐rich (Fe/Fe+Mg = 0.68 to 0.70) multiply saturated liquid. This low‐Ti liquid, also represented in the core by basalt and brown glass fragments, crystallized at the Mare Crisium site as a lava flow or intrusive and underwent little differentiation at the cooling site.