Comparing the Upper Triassic Deep-sea Flysch of the Shannan Terrane with the Coeval Shallow Shelf Sediments of the Tethys Himalaya, Southern Tibet

L. I. Xianghui, Frank Mattern

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

The provenance and paleogeography of the Upper Triassic deep-sea flysch Langjiexue Group (LG) of the Shannan Terrane in the northeastern Himalaya orogen, south of Yarlung Zangbo, have been disputed in recent years since its affinity to the Tethys Himalaya was suspected during the early 2000s. Based on the earlier discoveries of the Upper Permian–Triassic basalts and mafic dykes from the LG and of coeval detrital zircons from the Qulonggongba Formation (QF) in shallow shelf sediments of the Tethys Himalaya, the previous viewpoints on the basin and tectonics of the LG have been recently rejected. We compared the two units of the Upper Triassic, and our results reveal a number of differences, discrepancies, and inconsistencies in the debate, raising crucial questions on the postulation and provenance model of the remote Gondwanide Orogen for the LG. It is suggested that more observations and evidence are needed to further improve the paleogeographic understanding and relationship of the two units.

Original languageEnglish
Pages (from-to)348-354
Number of pages7
JournalActa Geologica Sinica
Volume95
Issue number2
DOIs
Publication statusPublished - Apr 2021
Externally publishedYes

Keywords

  • flysch
  • Late Triassic
  • paleogeography
  • sedimentology
  • Shannan Terrane
  • shelf sediment
  • Tethys
  • Tibet

ASJC Scopus subject areas

  • Geology

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