NASA NTRS · 19900046406
Highly evolved and ultramafic lithologies from Apollo 14 soils
Abstract
Eighteen 2-4-mm fragments were extracted from several Apollo 14 soil samples and examined by instrumental neutron activation analysis, and were studied petrographically. Results indicate that these rock fragments span almost the whole range of magma evolution, from ultramafic cumulates to extreme differentiates that were apparently produced by silicate liquid immiscibility. Three of the fragments are dimict granitic breccias composed of granitic clasts intruded by a ferropyroxenitic glass, and may represent an immmiscible melt pair that has been remixed by impact. Two fragments are ultramafic rocks, including a dunite with very low REE abundances and a peridotite/impact melt breccia.
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Morris, R. W., Taylor, G. J., Newsom, H. E., Keil, K., Garcia, S. R.. 1990-01-01. Highly evolved and ultramafic lithologies from Apollo 14 soils. https://ntrs.nasa.gov/citations/19900046406
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