Geochemistry of Yamato-82192, -86032 and -793274 lunar meteorites

スポンサーリンク

概要

• 論文の詳細を見る

• The major and trace element compositions of lunar meteorites Yamato (Y)-82192,Y-86032 and Y-793274 were determined by neutron activation analysis. Y-82192 and Y-86032 are anorthositic lunar meteorites rich in Al_2O_3 and CaO and poor in FeO, MgO and incompatible elements. Although these meteorites are similar in composition to each other and other anorthositic lunar meteorites, they are distinct in several key compositional characteristics. Y-793274 is a basaltic lunar meteorite rich in FeO, MgO, Sc, Cr, Co, and incompatible elements and poor in Al_2O_3 and CaO compared to anorthositic lunar meteorites. It is similar in many ways to lunar meteorite EET87521 which is also a basaltic breccia. It is distinct from EET87521 in its higher proportion of highland material, its meteoritic contamination and regolith glass, and in the composition of its dominant basalt component. Y-793274 contains 65-75% magnesian VLT basalt, while EET87521 consists of ferroan VLT basalt. The eleven lunar meteorites probably represent eight distinct falls. Four are anorthositic and four are basaltic. This 50-50 proportion of highlands-mare material contrasts strongly with the 83-17 proportion derived from photogeologic mapping. The dominance of VLT basalt among lunar meteorites contrasts with its scarcity among Apollo samples. The resolution of these discrepancies awaits further studies of basaltic lunar meteorites and further discoveries of new lunar meteorites.

• 国立極地研究所の論文

著者

• Lipschutz Michael

  Departmet of Chemistry, Purdue University

• Wang Ming-sheng

  Dept. Of Chemistry Purdue University

• Lindstrom Marilyn

  Sn2 Planetary Materials Nasa Johnson Space Center

• Lipschutz Michael

  Dept. of Chemistry, Purdue University

• Wang Ming-Sheng

  Department of Chemistry, Purdue University

• Lindstrom Marilyn

  Mail Code SN2, NASA Johnson Space Center

• Mittlefehdt David

  Lockheed Engineering and Science Co.,2400 NASA

• Martinez Rene

  Lockheed Engineering and Science Co., 2400 NASA

• Martinez Rene

  Lockheed Engineering And Science Co. 2400 Nasa

• Wang Ming-sheng

  Department Of Chemistry Purdue University

• Mittlefehdt David

  Mail Code C23 Lockheed Martin Smss

• Lipschutz Michael

  Dept. Of Chemistry Purdue University

• Lipschutz Michael

  Department Of Chemistry Brwn-wthr Chemistry Bldg. Purdue University

関連論文

• Possible thermal metamorphism on the C, G, B, and F asteroids detected from their reflectance spectra in comparison with carbonaceous chondrites
• Geochemistry of and alteration phases in martian lherzolite Y-793605
• Geochemistry and origin of achondritic inclusions in Yamato-75097, -793241 and -794046 chondrites
• Geochemistry of Yamato-82192, -86032 and -793274 lunar meteorites
• New petrographic and trace element data on thermally metamorphosed carbonaceous chondrites
• Labile trace elements in lunar meteorite Yamato-86032
• Labile trace elements and cosmogenic radionuclides in chondritic hosts of three consortium igneous inclusions
• Petrography, mineralogy and trace element chemistry of Yamato-86029, Yamato-793321 and Lewis Cliff 85332: Aqueous alteration and heating events
• Volatile chalcophile, siderophile and lithophile trace elements in lunar meteorite Yamato-82192
• Yamato-791197: A volatile trace element rich lunar highlands sample from Antarctica
• Consortium study of labile trace elements in some Antarctic carbonaceous chondrites: Antarctic and non-Antarctic meteorite comparisons
• Trace element contents of selected Antarctic meteorites-II: Comparison with non-Antarctic specimens

もっと見る 閉じる

スポンサーリンク