U–Pb zircon geochronology in the western part of the Rayner Complex, East Antarctica

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Author(s)

    • HORIE Kenji
    • National Institute of Polar Research|Department of Polar Science, The Graduate University for Advanced Studies (SOKENDAI)|Research and Development Center for Ocean Drilling Science, JAMSTEC
    • HOKADA Tomokazu
    • National Institute of Polar Research|Department of Polar Science, The Graduate University for Advanced Studies (SOKENDAI)
    • MOTOYOSHI Yoichi
    • National Institute of Polar Research|Department of Polar Science, The Graduate University for Advanced Studies (SOKENDAI)
    • SHIRAISHI Kazuyuki
    • National Institute of Polar Research|Department of Polar Science, The Graduate University for Advanced Studies (SOKENDAI)
    • HIROI Yoshikuni
    • Department of Earth Sciences, Graduate School of Science, Chiba University

Abstract

U–Pb zircon geochronology was applied to nine metasedimentary samples collected from Mt. Yuzhnaya, Condon Hills, and Mt. Lira in the inland region of the Rayner Complex of western Enderby Land, East Antarctica, in order to define the eastern limits of the western Rayner Complex that underwent the Pan–African metamorphism and to evaluate potential source areas of metasedimentary rocks. Condon Hills and Mt. Lira revealed metamorphic ages of ~ 894 and ~ 934 Ma, respectively, which are consistent with previously reported metamorphism in association with Rayner Structural Episode (RSE). Mt. Yuzhnaya samples affected by the RSE contain zircon grains rejuvenated during 590–570 Ma, which indicates that the Pan–African reworking can be extended up to Mt. Yuzhnaya. On the other hand, the Condon Hills samples include Archean detritus, and the age peaks from 3850 to 2491 Ma are the oldest components in the Rayner Complex of western Enderby Land. There is no evidence of reworked Napier Complex rocks in the studied Rayner samples.

Journal

  • Journal of Mineralogical and Petrological Sciences

    Journal of Mineralogical and Petrological Sciences 111(2), 104-117, 2016

    Japan Association of Mineralogical Sciences

Codes

  • NII Article ID (NAID)
    130005150437
  • Text Lang
    ENG
  • ISSN
    1345-6296
  • Data Source
    J-STAGE 
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