Depth-profiles and surface enrichment of the halogens in four Antarctic H5 chondrites and in two non-Antarctic chondrites

Details Depth-profiles and surface enrichment of the halogens in four Antarctic H5 chondrites and in two non-Antarctic chondrites Depth-profiles and surface enrichment of the halogens in four Antarctic H5 chondrites and in two non-Antarctic chondrites

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993metic..28...98l&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 28, no. 1, p. 98-104.

Computer Science

11

Chondrites, Contamination, Enrichment, Halogens, Meteoritic Composition, Antarctic Regions, Concentration (Composition), Neutron Activation Analysis, Sea Water, Weathering, Meteorites, Antarctic Meteorites, Stony Meteorites, Chondrites, Source, H5 Chondrites, Enrichment, Halogens, Depth, Surface, Alh Meteorites, Allende, Holbrook, L6 Chondrites, Cv3 Chondrites, Samples, Meteorite, Laboratory Studies, Neutron Activation Analysis, Naa, Concentration, Enrichment, Comparison, Contamination, Exposure Age, Proced

Scientific paper

Depth-profiles of F, Cl, Br, and I were determined in four different Antarctic H5 chondrites and two non-Antarctic chondrites. Neutron activation analysis and ion-selective potentiometry were used to study layers removed from the meteorites. Results indicated that Antarctic meteorites have higher concentrations of halogens at the surface than in the interior, with the highest enrichment factors for I and Cl. Measured surface enrichments are not correlated with the degree of weathering. Non-Antarctic meteorites showed similar halogen concentrations. A model based on these results is presented for estimation of the degree of contamination and relation to the duration of exposure at the surface of the Antarctic ice.

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