Oxidation during metamorphism of the ordinary chondrites

Details Oxidation during metamorphism of the ordinary chondrites Oxidation during metamorphism of the ordinary chondrites

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993gecoa..57.1105m&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 57, no. 5, p. 1105-1114.

Physics

31

Chondrites, Iron Meteorites, Metamorphism (Geology), Meteoritic Composition, Oxidation, Geophysical Fluids, Olivine, Pyroxenes, Reaction Kinetics, Meteorites, Stony Meteorites, Ordinary Chondrites, Oxidation, Iron, Metamorphism, Composition, Abundance, Olivine, Pyroxene, Metal, Heating, Thermal Effects, Fugacity, Oxygen, Mineralogy, Reduction, Temperature, Graphite, Hypotheses, Vapor, Water, H Chondrites, L Chondrites, Ll Chondrites, Parent Material

Scientific paper

It is suggested that some current concepts about the conditions of metamorphism in ordinary chondrites may be flawed. These meteorites display small systematic variations in the oxidation state of Fe. Evidence is presented that oxidation of Fe is linked to metamorphic grade in types 4-6 ordinary chondrites. This conclusion is at variance with a commonly accepted model for chondrite metamorphism that assumes Fe reduction by graphite.

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