Chemical studies of H chondrites. II - Weathering effects in the Victoria Land, Antarctic population and comparison of two Antarctic populations with non-Antarctic falls

Details Chemical studies of H chondrites. II - Weathering effects in the Victoria Land, Antarctic population and comparison of two Antarctic populations with non-Antarctic falls Chemical studies of H chondrites. II - Weathering effects in the Victoria Land, Antarctic population and comparison of two Antarctic populations with non-Antarctic falls

Mar 1987

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987gecoa..51..741d&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 51, March 1987, p. 741-754.

Other

10

Antarctic Regions, Chondrites, Geochemistry, Meteoritic Composition, Trace Elements, Petrology, Thermal Shock, Volatility, Weathering, Meteorites, Stony Meteorites, H Chondrites, Geochemistry, Weathering, Antarctic Meteorites, Neutron Activation Analysis, Rnaa, Siderophiles, Lithophiles, Chalcophiles, Trace Elements, Catalog, Yamato Meteorites, Depletion, Samples, Meteorite, Composition, Concentration, Manganese 53, Shock Effects, Parent Bodies, Laboratory Studies, Experiments, Procedure, Data, Alteration,

Scientific paper

The authors report RNAA data for 14 siderophile, lithophile and chalcophile volatile/mobile trace elements in interior portions of 45 different H4-6 chondrites (49 samples) from Victoria Land, Antarctica and 5 H5 chondrites from the Yamato Mts., Antarctica. Relative to H5 chondrites of weathering types A and B, all elements are depleted (10 at statistically significant levels) in extensively weathered (types B/C and C) samples. Chondrites of weathering types A and B seem compositionally uncompromised and as useful as contemporary falls for trace-element studies. When data distributions for these 14 trace elements in non-Antarctic H chondrite falls and unpaired samples from Victoria Land and from the Yamato Mts. (Queen Maud Land) are compared statistically, numerous significant differences are apparent. These and other differences give ample cause to doubt that the various sample populations derive from the same parent population. The observed differences do no reflect weathering, chance or other trivial causes: a preterrestrial source must be responsible.

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