Lunar ferroan anorthosites: mineralogy, compositional variations, and petrogenesis
Journal of Geophysical Research
By: J. J. McGee
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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
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Lunar ferroan anorthosites: mineralogy, compositional variations, and petrogenesis |
| Series title | Journal of Geophysical Research |
| Volume | 98 |
| Issue | E5 |
| Year Published | 1993 |
| Language | English |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Journal of Geophysical Research |
| First page | 9089 |
| Last page | 9105 |
| Google Analytic Metrics | Metrics page |