Forsteritic olivines from angrites and howardites

Details Forsteritic olivines from angrites and howardites Forsteritic olivines from angrites and howardites

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28..953m&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 953.

Other

Olivine, Meteorites, Igneous Rocks, Magnesium, Iron Oxides, Magnesium Oxides

Scientific paper

Angrites and HED (howardites-eucrites-diogenites) meteorites are the oldest known igneous rocks in the solar system; their crystallization ages are around 4.56 Ga. Oxygen isotopes of these meteorites are indistinguishable, and indicate a common parent body. However, detailed comparison of these meteorites has not been performed, especially in olivine mineralogy. Angrite is a unique basaltic achondrite whose mineralogy is distinct from other achondrites. Angrites are enriched in refractory elements, and are mainly composed of fassaitic clinopyroxenes, Ca-rich olivine, and anorthitic plagioclase. We have examined HED meteorites to find Mg-rich olivines as seen in angrites, in order to get insights into the genetic relation between these achondrites.

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