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《中国科学院地质与地球物理研究所2001学术论文汇编(第二卷)》 2001年
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Indosinian Foreland Fold-and-Thrust Belt Bordering Yunnan and Guangxi,China

【摘要】:正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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