Thermodynamic modeling of the crystallization of lunar basalt melts

Details Thermodynamic modeling of the crystallization of lunar basalt melts Thermodynamic modeling of the crystallization of lunar basalt melts

Oct 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990geokh.....1476a&link_type=abstract

Geokhimiia (ISSN 0016-7525), Oct. 1990, p. 1476-1485. In Russian.

Other

Basalt, Computer Programs, Crystallization, Lunar Soil, Thermodynamic Properties, Apollo 12 Flight, Apollo 15 Flight, Iron, Models, Olivine, Phase Transformations

Scientific paper

The temperature-composition data available for lunar basalt melts were used to construct olivine (Ol) and plagioclase (Pl) geothermometers, making it possible to compute crystallization temperatures of Ol and Pl with an accuracy of about 10 C. These relationships were used to develop a computer program, termed LUNAMAG, which can be used to model crystallization curves of sea-bottom basalts at normal pressure. The evolutionary trends of the melt phases of the Apollo-15 green glasses that are in the state of either equilibrium or fractional melt crystallization were analyzed and compared. It is shown that these samples might represent not an original high-temperature melt but products of an impact melt of olivine-pigeonite fragments which are in equilibrium with ferrobasalts.

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