Premium
Indosinian Foreland Fold‐and‐Thrust Belt Bordering Yunnan and Guangxi, China
Author(s) -
Genyao WU
Publication year - 2001
Publication title -
acta geologica sinica ‐ english edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 61
eISSN - 1755-6724
pISSN - 1000-9515
DOI - 10.1111/j.1755-6724.2001.tb00057.x
Subject(s) - geology , foreland basin , ophiolite , subduction , nappe , transpression , fold (higher order function) , obduction , china , convergent boundary , seismology , paleontology , oceanic crust , tectonics , shear zone , geography , mechanical engineering , archaeology , engineering
Recent discoveries of ophiolites indicate that there must be a Palaeotethyan geosuture zone bordering China and Vietnam, which separates the Vietbac block from the South China subcontinent. The Indosinian foreland fold‐and‐thrust belt bordering Yunnan and Guangxi provided further evidence for the palaeotethysides. The oceanic crust was subducted southwestwards while the magmatic arc migrated northeastwards, and the continent‐arc collision occurred in the Late Triassic with the thrusting being extended towards the north or northeast. The features of thrust‐nappe structure are discussed, which proved the continental margin of the Palaeotethyan ocean there to be a complicated one. A face‐to‐face collision occurred first along the NW‐striking segment and then along the ENE‐striking segment accompanied by transpression or oblique thrusting occurring along the NW‐striking one.