The petrology of the Apollo 12 pigeonite basalt suiteA study of the petrology of the Apollo 12 pigeonite basalt samples 12011, 12043, and 12007 is presented. In this suite, the abundances of olivine and Cr-spinel decrease with increasing grain size, while the abundances of plagioclase and ilmenite increase. The petrochemical and textural variations indicate that the pigeonite basalts were derived from the olivine basalts, but the compositional gap between the olivine and pigeonite basalts indicates that they could not have crystallized together from a single, initially homogeneous magma body.
Document ID
19800039392
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Baldridge, W. S. (California, University Los Alamos Scientific Laboratory, Los Alamos, N. Mex., United States)
Beaty, D. W. (Los Alamos Scientific Lab. NM, United States)
Hill, S. M. R. (Los Alamos Scientific Lab. NM, United States)
Albee, A. L. (California Institute of Technology Pasadena, Calif., United States)