Curtin University Homepage
  • Library
  • Help
    • Admin

    espace - Curtin’s institutional repository

    JavaScript is disabled for your browser. Some features of this site may not work without it.
    View Item 
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item
    • espace Home
    • espace
    • Curtin Research Publications
    • View Item

    The Early Permian active continental margin and crustal growth of the Cathaysia Block: In situ U–Pb, Lu–Hf and O isotope analyses of detrital zircons

    Access Status
    Fulltext not available
    Authors
    Li, X.
    Li, Zheng-Xiang
    He, B.
    Li, W.
    Li, Q.
    Gao, Y.
    Wang, Xuan-Ce
    Date
    2012
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Li, X. and Li, Z. and He, B. and Li, W. and Li, Q. and Gao, Y. and Wang, X. 2012. The Early Permian active continental margin and crustal growth of the Cathaysia Block: In situ U–Pb, Lu–Hf and O isotope analyses of detrital zircons. Chemical Geology. 328: pp. 195-207.
    Source Title
    Chemical Geology
    DOI
    10.1016/j.chemgeo.2011.10.027
    ISSN
    0009-2541
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/9738
    Collection
    • Curtin Research Publications
    Abstract

    Late Permian to Triassic (“Indosinian-aged”) orogenesis and associated magmatism are widespread in southeastern China, but their causes and significance to the regional geodynamic evolution are highly controversial. We report in this study integrated in situ U–Pb, Hf and O isotope analyses of detrital zircons from the Middle to Late Permian sediments in southeastern China, and use these data to decipher the sedimentary provenances, regional magmatic barcode and crustal evolution processes. A total of 409 concordant U–Pb zircon analyses on five sedimentary samples exhibits four major age peaks at ca 1870 Ma, ca 445 Ma, ca 370 Ma and ca 280 Ma, one “broad” age group of ca 1180–960 Ma, and two subordinate peaks at ca 2530 Ma and ca 800 Ma. All the Archean-aged detrital zircons are oval in shape with clear abrasive imprints, indicating long-distance transport and/or multi-cycled sedimentary processing from unknown Archean sources. In contrast, detrital zircons of the remaining age groups are mostly euhedral to subhedral crystals, suggesting short-distance transport. Zircon ages of ca 1870 Ma, ca 1180–960 Ma, ca 800 Ma, ca 445 Ma and ca 280 Ma are coeval with exposed magmatic rocks in the Cathaysia Block of southeastern China. The ubiquitous existence of ca 280 Ma detrital zircons in the studied sediments implies a widespread occurrence of Early Permian magmatic rocks in southeastern China coastal region.In situ Hf and O isotope analyses of detrital zircons reveal periods with growth of juvenile continental crust at ca 1870 Ma, ca 1400 Ma, ca 1140–940 Ma, ca 445 Ma and c. 280 Ma, alternating with reworking and recycling of continental crust at ca 1200 Ma, ca 830 Ma and ca 370 Ma. The ca 280 Ma detrital zircons display coherent, negative correlations between εHf(T) and δ18O values, indicating that their igneous source rocks probably formed with reworking of ancient supracrustal materials by mantle-derived magmas in an active continental margin. This interpreted ca 280 Ma magmatic event in an active continental margin is coincident with the remarkable change in regional palaeogeography from a carbonate platform in Carboniferous-earliest Permian time to an elongated uplift along the southeastern coastal regions in mid-Early Permian. Therefore, the early Indosinian tectonism and magmatism in southeastern South China most likely reflect the formation of a continental arc by the subduction of the Paleo-Pacific plate in the Early Permian.

    Related items

    Showing items related by title, author, creator and subject.

    • Triassic sedimentation and postaccretionary crustal evolution along the Solonker suture zone in Inner Mongolia, China
      Li, S.; Wilde, Simon; He, Z.; Jiang, X.; Liu, R.; Zhao, L. (2014)
      Detrital zircon U-Pb dating of the Xingfuzhilu Formation in southern Inner Mongolia yields a maximum depositional age of around 220 Ma. The predominantly Permian and Triassic zircons are characterized by oscillatory zoning ...
    • Precambrian evolution of the Tarim Block and its tectonic affinity to other major continental blocks in China: New clues from U-Pb geochronology and Lu-Hf isotopes of detrital zircons
      Li, Zheng-Xiang; Qiu, N.; Chang, J.; Yang, X. (2015)
      The Tarim Block, one of the largest Precambrian cratonic blocks in East Asia, is located in northwestern China. The Precambrian formation and evolution of the Tarim Block, and its tectonic affinity to other major continental ...
    • Mid-Neoproterozoic angular unconformity in the Yangtze Block revisited: Insights from detrital zircon U-Pb age and Hf-O isotopes
      Yang, C.; Li, X.; Wang, Xuan-Ce; Lan, Z. (2015)
      Middle Neoproterozoic sedimentary rocks are widespread in the South China Block, especially around the periphery of the Yangtze Block. They are separated into the Sibao and Danzhou groups (and their equivalents) by a ...
    Advanced search

    Browse

    Communities & CollectionsIssue DateAuthorTitleSubjectDocument TypeThis CollectionIssue DateAuthorTitleSubjectDocument Type

    My Account

    Admin

    Statistics

    Most Popular ItemsStatistics by CountryMost Popular Authors

    Follow Curtin

    • 
    • 
    • 
    • 
    • 

    CRICOS Provider Code: 00301JABN: 99 143 842 569TEQSA: PRV12158

    Copyright | Disclaimer | Privacy statement | Accessibility

    Curtin would like to pay respect to the Aboriginal and Torres Strait Islander members of our community by acknowledging the traditional owners of the land on which the Perth campus is located, the Whadjuk people of the Nyungar Nation; and on our Kalgoorlie campus, the Wongutha people of the North-Eastern Goldfields.