Mineralogy, chemistry, and noble gas contents of Adzhi-Bogdo- an LL3-6 chondritic breccia with L-chondritic and granitoidal clasts

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Erscheinungsjahr:
1993
Medientyp:
Text
Beschreibung:
  • Adzhi-Bogdo is an ordinary chondrite regolith breccia (LL3-6) which fell on 1949 October 30 in Gobi Altay, Mongolia. The rock consists of submm- to cm-sized fragments embedded in a fine-grained matrix. The polymict breccia contains various types of clasts, some of which must be of foreign origin. Components of the breccia include chondrules, melt rock clasts, achondritic textures, and alkali-granitoids. Based on the bulk chemical composition, Adzhi-Bogdo is an ordinary chondrite. The concentrations of Fe and Ni are somewhat intermediate between L- and LL- chondrites. The contents of solar gases indicate that Adzhi-Bogdo is a regolith breccia. Most of the solar He and probably a part of the solar Ne of Adzhi-Bogdo has been lost. It is suggested that Adzhi-Bogdo experienced an (impact-induced) thermal event early in its history, because most of the radiogenic Ar is retained.
Lizenz:
  • info:eu-repo/semantics/closedAccess
Quellsystem:
Forschungsinformationssystem der UHH

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oai:www.edit.fis.uni-hamburg.de:publications/3041c02f-c293-433d-b9e7-5bd56d66b5a8