| Indosinian Foreland Fold-and-Thrust Belt Bordering Yunnan and Guangxi, China |
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| 作者姓名： | WU Genyao Institute of Geology and Geophysics Chinese Academy of Sciences Beijing |
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| 作者单位： | WU Genyao Institute of Geology and Geophysics，Chinese Academy of Sciences，Beijing 100029 |
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| 摘 要： | 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.
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Indosinian Foreland Fold-and-Thrust Belt Bordering Yunnan and Guangxi, China |
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| Authors: | WU Genyao Institute of Geology and Geophysics Chinese Academy of Sciences Beijing |
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| Abstract: | 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. |
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| Keywords: | thrust-nappe structure foreland fold-and-thrust belt palaeotethysides border between Yunnan and Guangxi |
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