Rhenium-osmium isotopes and highly siderophile elements in ultramafic rocks from the Eoarchean Saglek Block, northern Labrador, Canada: implications for Archean mantle evolution
作者: Akira IshikawaKatsuhiko SuzukiKenneth D. CollersonJingao LiuD. Graham PearsonTsuyoshi Komiya
作者单位: 1Department of Earth Science and Astronomy, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo 153-8902, Japan
2Research and Development Center for Submarine Resources, Japan Agency for Marine Earth Science and Technology (JAMSTEC), Yokosuka 236-0016, Japan
3School of Earth and Environmental Sciences, University of Queensland, Brisbane, Qld 4072, Australia
4Department of Earth and Atmospheric Sciences, University of Alberta, Edmonton T6G 2E3, Canada
5State Key Laboratory of Geological Processes and Mineral Resources, China University of Geosciences, Beijing 100083, China
刊名: Geochimica et Cosmochimica Acta, 2017
来源数据库: Elsevier Journal
DOI: 10.1016/j.gca.2017.07.023
关键词: Highly siderophile elementRe-Os systematicsPeridotiteKomatiiteMantleEarly ArcheanLate accretion
英文摘要: Abstract(#br)We determined highly siderophile element (HSE: Os, Ir, Ru, Pt, Pd, and Re) concentrations and 187 Os/ 188 Os ratios for ultramafic rocks distributed over the Eoarchean gneiss complex of the Saglek-Hebron area in northern Labrador, Canada in order to constrain to what extent variations in HSE abundances are recorded in Early Archean mantle that have well-resolved 182 W isotope anomalies relative to the present-day mantle (∼+11ppm: Liu et al., 2016). The samples analysed here have been previously classified into two suites: mantle-derived peridotites occurring as tectonically-emplaced slivers of lithospheric mantle, and metakomatiites comprising mostly pyroxenitic layers in supracrustal units dominated by amphibolites. Although previous Sm-Nd and Pb-Pb...
全文获取路径: Elsevier  (合作)
影响因子:3.884 (2012)

  • ultramafic 超镁铁质的
  • northern 北方的
  • osmium 
  • accretion 附加体
  • Canada 加拿大
  • mantle 地幔
  • systematics 分类学
  • evolution 进化
  • elements 初步
  • highly 高度地