Constraint on the spatial distribution of the Early and Middle Jurassic units within the Nakatsugawa Complex of the North Kitakami Belt by detrital zircon U–Pb dating

DOI Web Site Web Site 26 References Open Access
  • OSAKA Masashi
    Faculty of International Resource Sciences, Akita University
  • AOKI Shogo
    Graduate School of International Resource Sciences, Akita University AIST, Geological Survey of Japan, Research Institute for Geo-Resources and Environment
  • UCHINO Takayuki
    AIST, Geological Survey of Japan, Research Institute of Geology and Geoinformation
  • FUKUYAMA Mayuko
    Graduate School of Engineering Science, Akita University

Bibliographic Information

Other Title
  • 砕屑性ジルコンU–Pb 年代測定による北部北上帯中津川コンプレックスにおける前期及び中期ジュラ紀ユニット分布の制約

Search this article

Abstract

<p>Previous detrital zircon U–Pb and fossil studies of the terrigenous rocks in the southwestern unit (Nakatsugawa Complex) of the North Kitakami Belt have suggested that the unit was formed during the Early to Middle Jurassic. In this study, we additionally performed detrital zircon U–Pb dating of two sandstones in the southwest part of the Nakatsugawa Complex (sample OM-07 and OM-06) for constraining the spatial distribution of the Early and Middle Jurassic units of the complex. As a result, those two samples showed youngest cluster ages of the middle and late Early Jurassic (183.3 ± 1.0 Ma in OM-07 and 176.7 ± 1.6 Ma in OM-06), respectively. Combining data from this and previous studies, we conclude that the unit from the southwestern margin to the location of OM-06 in the complex was formed during the Early Jurassic, while its northeastern part was formed during the Middle Jurassic. Moreover, it seems that the Nakatsugawa Complex has been formed without a significant age gap.</p>

Journal

References(26)*help

See more

Related Projects

See more

Keywords

Details 詳細情報について

Report a problem

Back to top