Variation of the phase composition of C2 chondrites on heating

Details Variation of the phase composition of C2 chondrites on heating Variation of the phase composition of C2 chondrites on heating

Aug 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982e%26psl..60....8m&link_type=abstract

Earth and Planetary Science Letters, vol. 60, no. 1, Aug. 1982, p. 8-16.

Computer Science

Carbonaceous Chondrites, High Temperature Tests, Metamorphism (Geology), Electron Probes, Magnetite, Meteoritic Composition, Temperature Effects, X Ray Diffraction

Scientific paper

Moessbauer spectroscopy, X-ray diffraction and electron probe microanalysis are used to determine phase distributions in an investigation of the metamorphism kinetics of the Staroe Boriskino C2 chondrite. The specimens were heated at 450 C in helium atmosphere for 160 minutes, and one of them was subsequently heated to 500 C for 10 minutes. It is found that over the first two minutes, as a result of dehydration, the iron of the phillosilicate is oxidized with the realization of charge compensation through the removal of iron and magnesium cations. Magnetite and forsterite are formed. The sample that underwent additional heating exhibited iron in the olivine structure, the degree of iron oxidation declined, and magnetite disappeared.

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