Apollo 12 feldspathic basalts 12031, 12038 and 12072 - Petrology, comparison and interpretationsThe paper presents the petrology of Apollo 12 feldspathic basalts. Modal and chemical data indicate that basalts 12072, 12038, and 12031 cannot be related to the other Apollo rock types; 12072 contains phenocrysts of olivine and pigeonite, 12038 is a multiply saturated equigranular basalt, and 12031 is a coarse-grained rock with granular to graphic intergrowths of pyroxene and plagioclase. The bulk compositions indicate that these basalts could not have been derived from the Apollo 12 olivine or ilmenite basalts by crystal-liquid fractionation, and their petrologic similarities suggest that they were produced in the same or similar source regions.
Document ID
19800039391
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Beaty, D. W. (California Inst. of Tech. Pasadena, CA, United States)
Hill, S. M. R. (California Inst. of Tech. Pasadena, CA, United States)
Albee, A. L. (California Institute of Technology Pasadena, Calif., United States)
Baldridge, W. S. (California, University Los Alamos Scientific Laboratory, Los Alamos, N. Mex., United States)