A new type of oxidized and pre-irradiated micrometeorite
作者: Carole CordierBastian BaeckerUlrich OttLuigi FolcoMario Trieloff
作者单位: 1Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, IRD, IFSTTAR, ISTerre, 38000 Grenoble, France
2Institut für Geowissenschaften, Klaus-Tschira-Labor für Kosmochemie, Universität Heidelberg, Im Neuenheimer Feld 234-236, 69120 Heidelberg, Germany
3Max-Planck-Institut für Chemie, Hahn-Meitner-Weg 1, 55128 Mainz, Germany
4Magyar Tudományos Akadémia Atommagkutató Intézet, Bem tér 18/c, 4026 Debrecen, Hungary
5Dipartimento di Scienze della Terra, Università di Pisa, Via S. Maria 53, 65126 Pisa, Italy
刊名: Geochimica et Cosmochimica Acta, 2018, Vol.233 , pp.135-158
来源数据库: Elsevier Journal
DOI: 10.1016/j.gca.2018.04.010
关键词: MicrometeoriteInterplanetary dustCK chondritesOxidationNoble gasesCosmogenic Ne and ArPre-irradiation
英文摘要: Abstract(#br)This paper investigates the mineralogy and noble gas composition of a unique micrometeorite from the Transantarctic Mountains, #45c.29. The magnetite rim and the particle interior with olivine, pyroxene and magnetite relict grains (30–250 µm in size) set in a vesicular mesostasis are typical features of coarse-grained, partially melted micrometeorites. Particle #45c.29 stands out from other micrometeorites of this type by the texture of the mesostasis made of abundant plagioclase and augite laths, the remarkably high Ni contents in magnetite and olivine relict grains, and by the similarly high abundance of cosmogenic noble gases ( 21 Ne cos up to 1.62 × 10 −7 cm 3 STP/g and 38 Ar up to 7.2 × 10 −8 cm 3 STP/g). The high Ni content of Fa 26 olivine relict grains (NiO ∼ 0.65...
全文获取路径: Elsevier  (合作)
影响因子:3.884 (2012)

  • micrometeorite 微陨石
  • oxidized 被氧化的
  • irradiation 照射
  • gases 气体