Sphalerites in EH chondrites. I - Textural relations, compositions, diffusion profiles, and pressure-temperature histories

Details Sphalerites in EH chondrites. I - Textural relations, compositions, diffusion profiles, and pressure-temperature histories Sphalerites in EH chondrites. I - Textural relations, compositions, diffusion profiles, and pressure-temperature histories

Jul 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989gecoa..53.1657e&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 53, July 1989, p. 1657-1668. Research supported by DFG.

Computer Science

8

Chondrites, Meteoritic Composition, Textures, Zincblende, Electron Microscopy, Inhomogeneity, Iron Compounds, Petrography, Pressure Gradients, Sulfur Compounds, Thermal Diffusion, Trace Elements, Meteorites, Sphalerite, E Chondrites, Texture, Composition, Diffusion, Pressure, Temperature, Thermal History, Qingzhen, Yamato Meteorites, Yamato 691, Indarch, Iron Sulfide, Samples, Meteorite, Photomicrographs, Laboratory Studies, Barometry, Procedure, Petrography, Mineralogy, Chemistry, Concentration

Scientific paper

The textural relations, compositions, and FeS-concentration profiles within individual grains of sphalerite-bearing assemblages were examined in the Qingzhen, Yamato 691, and Indarch EH chondrites, and the applicability of the results for the determination of the pressure-temperature (P-T) history of EH chondrites was investigated. The P-T isopleths were calculated for all analyzed sphalerites in Qingzhen and Yamato 691 (i.e., primary, cores, rims, and secondary sphalerite), using the equation of Hutchison and Scott (1983). Results of this study indicate that sphalerites in Qingzhen and Yamato 691 were formed in the solar nebula under very similar conditions but were metamorphosed at different P-T conditions and at differnt times.

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