Triassic tectonics of the southern margin of the South China Block

Abstract : Middle Triassic orogens are widespread around and inside the South China Block (SCB). The southern peripheral belts that develop from northwest to southeast, namely Jinshajiang, Ailaoshan, NW Vietnam, NE Vietnam, Yunkai and Hainan exhibit striking similarities, with Permian–Early Triassic magmatic arc, ophiolitic mélange, northeast- to north-directed synmetamorphic ductile nappes, and fold-and-thrust belt. These collisional belts result from oceanic, then continental subduction of the SCB below Indochina. Eastward of Hainan Island, a Triassic suture is hypothesized offshore of the SCB. Within the SCB, the Xuefengshan is a Middle Triassic intracontinental orogen with northwest-directed folds and thrusts, and an intracrustal ductile décollement. This orogen accommodated the Middle Triassic continental subduction of the western part of the SCB below the eastern part. At variance to the generally accepted models, the inter- and intracontinental Triassic orogens of the SCB are interpreted here as the result of south-directed subductions of the SCB.
Complete list of metadatas

Cited literature [4 references]  Display  Hide  Download

https://hal-insu.archives-ouvertes.fr/insu-01188798
Contributor : Nathalie Pothier <>
Submitted on : Monday, August 31, 2015 - 3:22:20 PM
Last modification on : Wednesday, May 15, 2019 - 3:58:04 AM
Long-term archiving on : Tuesday, December 1, 2015 - 10:41:57 AM

File

CR Trias V2 15-00073R1.pdf
Files produced by the author(s)

Identifiers

Citation

Michel Faure, Wei Lin, Yang Chu, Claude Lepvrier. Triassic tectonics of the southern margin of the South China Block. Comptes Rendus Géoscience, Elsevier Masson, 2016, 348, pp.5-14. ⟨10.1016/j.crte.2015.06.012⟩. ⟨insu-01188798⟩

Share

Metrics

Record views

533

Files downloads

360