Repeated magmatic buildup and deep “hot zones” in continental evolution: The Cadomian crust of Iran
作者: Hadi Shafaii MoghadamQ.L. LiW.L. GriffinR.J. SternO. IshizukaH. HenryF. LucciS.Y. O'ReillyG. Ghorbani
作者单位: 1State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences, Beijing 100029, China
2School of Earth Sciences, Damghan University, Damghan 36716-41167, Iran
3Arc Centre of Excellence for Core to Crust Fluid Systems and GEMOC ARC National Key Centre, Dept. of Earth and Planetary Sciences, Macquarie University, NSW 2109, Australia
4Geosciences Dept. University of Texas at Dallas, Richardson, TX 75083-0688, USA
5Japan Agency for Marine-Earth Science and Technology, 2-15 Natsushimacho, Yokosuka, Kanagawa, 237-0061, Japan
6Geological Survey of Japan/AIST, Tsukuba, Ibaraki, 305-8567, Japan
7Dipartimento di Scienze, Sezione Scienze Geologiche, Università “Roma Tre”, 1-00146 Rome, Italy
刊名: Earth and Planetary Science Letters, 2020, Vol.531
来源数据库: Elsevier Journal
DOI: 10.1016/j.epsl.2019.115989
关键词: Continental crustMagmatic flare-upHot zoneCadomianIran
原始语种摘要: Abstract(#br)The generation and differentiation of continental crust by arc magmatism is strongly influenced by episodes of high magmatic flux (“flare-ups”). Magmatic flare-ups encourage the development of deep crustal hot zones where magmatic differentiation and density stratification combine to form the upper felsic and lower mafic continental crust. Such processes, which are responsible for the construction of continental arc crust, are prolonged events, which build a ∼30-40 km arc crust over tens of million years (∼100 Myr). New zircon U-Pb data reveal that the construction of Cadomian crust from NE Iran occurred over ∼15 ± 0.3 Myr. However, compiled zircon U-Pb ages reveal a prolonged magmatic flare-up of ∼45 Myr; ∼570 to 525 Ma. Basement outcrops in NE Iran expose lower- and upper...
全文获取路径: Elsevier  (合作)
影响因子:4.349 (2012)

  • crust 外壳
  • magmatic 岩浆的
  • continental 大陆的
  • zircon 锆石
  • mafic 镁铁质的
  • magmatism 岩浆酌
  • flare 太阳耀斑
  • geochemical 地球化学的
  • igneous 火成的
  • construction 构造