Extensive impact melting on the H-chondrite parent asteroid during the cataclysmic bombardment of the early solar system: Evidence from the achondritic meteorite Dar al Gani 896 1 1 Associate editor: W. U. Reimold
作者: Luigi FolcoPhilip A. BlandMassimo D’OrazioIan A. FranchiSimon P. KelleySergio Rocchi
作者单位: 1Museo Nazionale dell’Antartide, Via Laterina 8, 53100 Siena, Italy
2Department of Earth Science and Engineering, Royal School of Mines, Imperial College, Prince Consort Road, London SW7 2BP, United Kingdom UK
3Dipartimento di Scienze della Terra, Università di Pisa, Via S. Maria 53, 56126 Pisa, Italy
4Planetary and Space Sciences Research Institute, Milton Keynes, MK7 6AA, United Kingdom UK
5Department of Earth Sciences, Open University, Milton Keynes, MK7 6AA, United Kingdom UK
刊名: Geochimica et Cosmochimica Acta, 2003, Vol.68 (10), pp.2379-2397
来源数据库: Elsevier Journal
DOI: 10.1016/j.gca.2003.11.023
原始语种摘要: Abstract(#br)DaG 896 is an olivine-rich microporphyritic rock of komatiitic composition. Both the olivine composition (Fa 17.5±2.1 , [Mn/Mg] = 0.0061) and the bulk oxygen isotopic composition (δ 17 O = +2.55, δ 18 O = +3.50) indicate that DaG 896 is a sample of the H-chondrite parent body. The bulk chemistry shows an H-chondritic distribution of lithophile elements, whereas chalcophile and siderophile elements are strongly depleted, indicating formation through whole-rock melting (or nearly so) of H-chondrite material, nearly complete loss of the metal plus sulfide component, and crystallization without significant igneous fractionation. Superheated, severely shocked chondritic relics (∼10 vol%), typically in the form of corroded lithic fragments <100 μm in size intimately distributed...
全文获取路径: Elsevier  (合作)
影响因子:3.884 (2012)

  • impact 冲击碰撞
  • chondrite 球粒陨石
  • settling 沉陷
  • asteroid 小行星
  • during 在的期间
  • cataclysmic 洪水的
  • bombardment 轰击
  • parent 母体
  • melting 熔化
  • solar 太阳