| Abstract: | Details petrologic study of a suite of lunar ferroan anorthosites indicates that their mineral compositional variations are generally consistent with derivation of these anorthosites from a common parent magma. Relict textures, zoning, and possible primary trends of mineral compositional variations are preserved in many of the anorthosites. The presence of heterogeneous, bimodal, and/or trimodal pyroxene compositions suggests that some of the anorthosites are polymict rocks. Some aspects of the mineral composition data suggest that complex processes operated during formation of the ferroan anorthosites. Processes operative during anorthosite formation may have included some mixing of different melts, trapping of variable amounts of intercumulus liquid, postcrystallization redistribution of elements, or perturbations both during adcumulus growth and subsequent to crystallization by impact events. -from Author |
| Genre: | Article |
| ProdID: | 70018242 |
| Citation Author: | McGee, J. J. |
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| Citation End Page: | 9105 |
| Citation Issue: | E5 |
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| Citation Language: | English |
| Citation Larger Work Title: | Journal of Geophysical Research |
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| Citation Number Of Pages: | 17 |
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| Citation Search Results Text: | Lunar ferroan anorthosites: mineralogy, compositional variations, and petrogenesis; 1993; Article; Journal; Journal of Geophysical Research; McGee, J. J. |
| Citation Start Page: | 9089 |
| Citation Volume: | 98 |
| Citation Year: | 1993 |
| Type: | citation/reference |
| Text: | Lunar ferroan anorthosites: mineralogy, compositional variations, and petrogenesis; 1993; Article; Journal; Journal of Geophysical Research; McGee, J. J. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| Date Other: | Fri, 1 Jan 1993 00:00 -0600 |
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