Modeling phase relationships and estimating the conditions of magmatic-rock crystallization in the Mare Crisium area of the moon

Details Modeling phase relationships and estimating the conditions of magmatic-rock crystallization in the Mare Crisium area of the moon Modeling phase relationships and estimating the conditions of magmatic-rock crystallization in the Mare Crisium area of the moon

Nov 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991geokh.....1523a&link_type=abstract

Geokhimiia (ISSN 0016-7525), Nov. 1991, p. 1523-1534. In Russian.

Computer Science

Basalt, Impact Melts, Lunar Maria, Lunar Rocks, Magma, Chemical Composition, Phase Transformations

Scientific paper

Based on a computer program (LUNAMAC) of mare basalt crystallization, geochemical thermometry of the equilibrium crystallization products of melts representing 85 rocks and glasses of Luna-24 was carried out. It was found that about 70 percent of all samples were from a unique set of cotectic lines corresponding to very-low-Ti mare basalts. The most numerous compact clusters of these compositions were observed in the interval 1130-1170 C, which characterizes predominant temperatures of the Mare Crisium basaltic magmas extrusions. Most ferrobasalts were found to be supersaturated by plagioclase, despite the fact that the analysis of cotectic lines (Ol+Pl+/-Px) indicated that these rocks are related to Luna-24 high-Mg basalts and green glasses.

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