Dislocations and voids in pyroxene from a low-temperature eclogite: Mechanism of eclogite formation |
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| Authors: | P. E. Champness W. S. Fyfe G. W. Lorimer |
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| Affiliation: | (1) Department of Chemistry and Institute of Geophysics and Planetary Physics, University of California, 90024 Los Angeles, CA |
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| Abstract: | New occurrences of the phosphates sarcopside/graftonite (Fe, Mn)3(PO4)2, farringtonite (Mg, Fe)3(PO4)2, and brianite Na2CaMg(PO4)2 in iron meteorites are reported. The sarcopside in Duel Hill (1854) (IVA-Anom) contains less than 0.1 mole % Mn3(PO4)2 and more nearly approaches the Fe-rich end member than does any previously reported natural occurrence. This identification of farringtonite in Barranca Bianca (IIE) is the first report of this mineral in a meteorite group other than the pallasites. |
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