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2018•Open Research Online (The Open University)Open access

Fine-Scale Variations in Eucritic Pyroxene FeO/MnO: Process vs. Provenance.

David W. Mittlefehldt, Thomas J. Barrett, L. Le, Z. X. Peng, E. L. Berger, Daniel Kent Ross

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Abstract

Most asteroidal igneous rocks are eucrite-like basalts and gabbros, composed mostly of ferroan low- and high-Ca pyroxenes and calcic plagioclase, plus smaller amounts of silica (most commonly tridymite), ilmenite, chromite, troilite, Ca-phosphate, metal and sometimes ferroan olivine. Eucrite-like mafic rocks are fragments of the crusts of differentiated asteroids, and most are likely from 4 Vesta.

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Most asteroidal igneous rocks are eucrite-like basalts and gabbros, composed mostly of ferroan low- and high-Ca pyroxenes and calcic plagioclase, plus smaller amounts of silica (most commonly tridymite), ilmenite, chromite, troilite, Ca-phosphate, metal and sometimes ferroan olivine. Eucrite-like mafic rocks are fragments of the crusts of differentiated asteroids, and most are likely from 4 Vesta.

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Available abstract

Most asteroidal igneous rocks are eucrite-like basalts and gabbros, composed mostly of ferroan low- and high-Ca pyroxenes and calcic plagioclase, plus smaller amounts of silica (most commonly tridymite), ilmenite, chromite, troilite, Ca-phosphate, metal and sometimes ferroan olivine. Eucrite-like mafic rocks are fragments of the crusts of differentiated asteroids, and most are likely from 4 Vesta.

Key concepts: Pyroxene, Troilite, Geology, Mafic, Geochemistry, Ilmenite, Tridymite, Olivine

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Fine-Scale Variations in Eucritic Pyroxene FeO/MnO: Process vs. Provenance. — Research Paper | ScholarLens