Trace element contents of selected Antarctic meteorites-II: Comparison with non-Antarctic specimens

• Main Authors: Swarajranjan Biswas, Thomas M. Walsh, Henry T. Ngo, Michael E. Lipschutz
• Format: Report
• Language: English
• Published: Department of Chemistry, Purdue University/Department ofChemistry, Purdue University/Department of Chemistry, Purdue University/Department of Chemistry, Purdue University 1981
• Subjects: Antarctic; Antarc*; Memoirs of National Institute of Polar Research; Polar Research
• Online Access: https://nipr.repo.nii.ac.jp/?action=repository_uri&item_id=1216; http://id.nii.ac.jp/1291/00001216/; https://nipr.repo.nii.ac.jp/?action=repository_action_common_download&item_id=1216&item_no=1&attribute_id=18&file_no=1

We used radiochemical neutron activation analysis to determine Ag, As, Au, Bi, Cd, Co, Cs, Cu, Ga, In, Rb, Sb, Se, Te, Tl and Zn in interior portions of 5 Antarctic meteorites-ALHA76004 (LL3), ALHA77081 (Acapulco-like), ALHA77219 (mesosiderite?), ALHA77307 (C3V), ALHA78113 (aubrite)-and Acapulco chondrite. Where comparison is possible, all data for these weathering type A and B ALH meteorites and for 4 others agree well with data for corresponding non-Antarctic meteorites. These agreements are at least as good as those involving only non-Antarctic L6 falls demonstrating that type A and at least some type B ALH meteorites provide compositional data yielding important genetic information. As an example, compositions of Acapulco-like chondrites differ from that of a forsterite (F) chondritic inclusion in Cumberland Falls. Therefore, at least two chondritic groups occupy the compositional gap between E and H chondrites.