Differentiation of an Apollo 12 picrite magma

Details Differentiation of an Apollo 12 picrite magma Differentiation of an Apollo 12 picrite magma

Apr 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976lpsc....7.1365w&link_type=abstract

In: Lunar Science Conference, 7th, Houston, Tex., March 15-19, 1976, Proceedings. Volume 2. (A77-34651 15-91) New York, Pergamon

Computer Science

8

Basalt, Lunar Rocks, Magma, Olivine, Petrology, Apollo 12 Flight, Feldspars, Grain Boundaries, Photomicrographs, Pyroxenes

Scientific paper

The Apollo 12 olivine basalt suite shows a strong positive correlation of grain size with normative olivine content. This correlation is interpreted to mean that the suite of samples represents the basal portion of a cooling unit which differentiated by simple olivine settling. The grain size of plagioclase observed in the coarsest samples indicates the cooling unit may have been as much as 30 m thick. The amount of olivine concentration observed in the suite is quantitatively internally consistent with simple olivine settling in a magma body of this size which has the composition of the chill margin.

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