Labile trace elements in lunar meteorite Yamato-86032

• Wang Ming-Sheng

  Department of Chemistry, Purdue University

• Lipschutz Michael E.

  Department of Chemistry, Purdue University

Abstract

Contents of siderophile Au, Co and Sb, mobile Ag, Bi, Cd, In, Se, Te, Tl and Zn and lithophile Cs, Ga, Rb and U were determined by RNAA in samples of the lunar meteorite (anorthositic breccia) Yamato (Y)-86032. Contents of the 4 lithophiles in matrix (, 75AM) and anorthositic clast (, 101AC) are similar to those in samples of the other 3 lunar meteorites. This is consistent with all these anorthositic breccias being from the lunar highlands. Contents of the other 11 elements indicate a micrometeorite component of 2.5±1.1% (Cl-equivalent) in the parent regolith of Y-86032,75AM. This value is unusual for lunar samples and is virtually identical to the value for the paired samples Y-82192/3 found in the same bare ice region, suggesting that these 3 specimens derive from the same lunar region in the same impact. No micrometeorite component is detectable in Y-86032,101AC. Slight compositional differences between Y-82192/3 and Y-86032 indicate that they did not travel Earthward as a single rock. Allan Hills-81005 and Y-791197 each exhibit characteristic siderophile/mobile element patterns indicating deviation from different parent regions in separate events. Hence, the 5 lunar meteorites studied thus far derive from 3 distinct impacts.

Journal

• Proceedings of the NIPR Symposium on Antarctic Meteorites

  Proceedings of the NIPR Symposium on Antarctic Meteorites 3 19-26, 1990-10

  National Institute of Polar Research

Details

• CRID: 1571135651773190528
• NII Article ID: 110000029898
• NII Book ID: AA10784627
• ISSN: 09145621
• Text Lang: en
• Data Source:
  • CiNii Articles