Physics
Scientific paper
Nov 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983lpsc...13..645n&link_type=abstract
In: Lunar and Planetary Science Conference, 13th, Houston, TX, March 15-19, 1982, Proceedings. Part 2. (A83-21281 07-91) Washing
Physics
3
Anorthosite, Breccia, Lunar Crust, Lunar Rocks, Crystallization, Lunar Evolution, Microstructure, Olivine, Petrology, Pyroxenes
Scientific paper
A detailed textural and petrographic description is presented of one of the more mafic-rich ferroan anorthosites, 62236. A comparison is also undertaken of the thermal and mechanical histories of the ferroan anorthosite clasts in this breccia, using the techniques of analytical transmission electron microscopy and electron microprobe analysis. The mafic phases, which are of olivine, inverted pigeonite, and augite, fill interstitial areas between larger plagioclases and appear to be cumulative phases with extensive adcumulus growth. The entire sample has undergone heterogeneous shock deformation. The present evidence indicates that 62236 contains parts of a slowly cooled, microlayered adcumulate that has been heterogeneously shocked several times and combined into the present breccia.
Nord Gordon L. Jr.
Wandless M.-V.
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