Drivers for late Paleozoic to early Mesozoic orogenesis in South China

Constraints from the sedimentary record

Lisha Hu, Yuansheng Du, Peter A. Cawood, Yajun Xu, Wenchao Yu, Yanhui Zhu, Jianghai Yang

Research output: Contribution to journalArticleResearchpeer-review

25 Citations (Scopus)

Abstract

Unconformity bound Permo-Triassic successions in the Qinfang Basin, South China Craton, reflect tectonic processes associated with tectonothermal activity along the margins of the craton. The provenance record of these successions, based on modal analysis, geochemical composition, detrital zircon U-Pb ages, and paleocurrent data indicate derivation from the adjoining Precambrian Yunkai massif and surrounding Paleozoic sedimentary units. The quartz dominated nature of the siliciclastic units, along with their high Th/Sc and Zr/Sc ratios indicate a recycled orogen source. Detrital zircons from Late Permian to Early Triassic samples display major age groups at 1100-800. Ma, 650-500. Ma, 480-420. Ma, with subordinate age groups at 2800-2400. Ma, 1900-1600. Ma and 1400-1200. Ma. Late Triassic sandstones show a similar detrital zircon age pattern as well as a 300-250. Ma age group. Integration of this provenance data with regional geological information suggests that the unconformity at the base of the Permian succession is related to subduction of the Paleo-Tethys ocean to the south of the craton, whereas the major driver for Triassic tectonic activity corresponds with terrane accretion and the termination of Paleo-Tethys Ocean subduction along the southwest margin of the craton.

Original languageEnglish
Pages (from-to)107-120
Number of pages14
JournalTectonophysics
Volume618
DOIs
Publication statusPublished - 31 Mar 2014
Externally publishedYes

Keywords

  • Detrital record
  • Permian-Triassic tectonic event
  • Provenance analysis
  • Qinfang Basin
  • South China Craton

Cite this

Hu, Lisha ; Du, Yuansheng ; Cawood, Peter A. ; Xu, Yajun ; Yu, Wenchao ; Zhu, Yanhui ; Yang, Jianghai. / Drivers for late Paleozoic to early Mesozoic orogenesis in South China : Constraints from the sedimentary record. In: Tectonophysics. 2014 ; Vol. 618. pp. 107-120.
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Drivers for late Paleozoic to early Mesozoic orogenesis in South China : Constraints from the sedimentary record. / Hu, Lisha; Du, Yuansheng; Cawood, Peter A.; Xu, Yajun; Yu, Wenchao; Zhu, Yanhui; Yang, Jianghai.

In: Tectonophysics, Vol. 618, 31.03.2014, p. 107-120.

Research output: Contribution to journalArticleResearchpeer-review

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T1 - Drivers for late Paleozoic to early Mesozoic orogenesis in South China

T2 - Constraints from the sedimentary record

AU - Hu, Lisha

AU - Du, Yuansheng

AU - Cawood, Peter A.

AU - Xu, Yajun

AU - Yu, Wenchao

AU - Zhu, Yanhui

AU - Yang, Jianghai

PY - 2014/3/31

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AB - Unconformity bound Permo-Triassic successions in the Qinfang Basin, South China Craton, reflect tectonic processes associated with tectonothermal activity along the margins of the craton. The provenance record of these successions, based on modal analysis, geochemical composition, detrital zircon U-Pb ages, and paleocurrent data indicate derivation from the adjoining Precambrian Yunkai massif and surrounding Paleozoic sedimentary units. The quartz dominated nature of the siliciclastic units, along with their high Th/Sc and Zr/Sc ratios indicate a recycled orogen source. Detrital zircons from Late Permian to Early Triassic samples display major age groups at 1100-800. Ma, 650-500. Ma, 480-420. Ma, with subordinate age groups at 2800-2400. Ma, 1900-1600. Ma and 1400-1200. Ma. Late Triassic sandstones show a similar detrital zircon age pattern as well as a 300-250. Ma age group. Integration of this provenance data with regional geological information suggests that the unconformity at the base of the Permian succession is related to subduction of the Paleo-Tethys ocean to the south of the craton, whereas the major driver for Triassic tectonic activity corresponds with terrane accretion and the termination of Paleo-Tethys Ocean subduction along the southwest margin of the craton.

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