Computer Science
Scientific paper
Dec 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982polre..25...78c&link_type=abstract
(Symposium on Antarctic Meteorites, 7th, Tokyo, Japan, Feb. 19, 20, 1982) National Institute of Polar Research, Memoirs, Special
Computer Science
Meteorites, Antarctic Meteorites, Metal, Enrichment, Mesosiderites, Rkp Meteorites, Rkpa79015, Samples, Meteorite, Laboratory Studies
Scientific paper
A 10.0 kg iron-rich meteorite (RKPA79015) and four silicate-rich fragments (RKPA80229, 80246, 80258, and 80263) are individuals from a new Antarctic mesosiderite. The silicate minerals present are orthopyroxene of uniform composition (Wo2En74FS24) and calcium-rich plagiclase of somewhat variable composition (An56-An94). Pigeonite and olivine have been looked for and not found. Chromite containing Al2O3 7.0 percent, MgO 1.8 percent, MnO 1.6 percent, and TiO2 0.5 percent is present, as is merrillite. Analysis of the metallic component gave 9.87 percent Ni, 0.52 percent Co, 0.15 percent P, and 2.14 percent FeS. Metallic areas consist of polycrystalline kamacite with grain boundaries containing cloudy taenite and schreibersite. Cloudy taenite areas have thick borders of tetrataenite. These metallographic associations indicate a low-temperature cooling history identical to that of well known mesosiderites.
Clarke Roy S.
Mason Brian
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