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金沙江带位于中咱地块和昌都地块之间 ,保存有各种构造背景的沉积物 .这些地层呈断片产出 ,而不是连续地层 .我们选择滇西北拖顶—霞若地区 ,对金沙江带被动陆缘地层断片进行了地质填图研究 ,对各地层断片的时代和沉积环境进行了分析 .在此基础上 ,恢复了金沙江带被动陆缘的地层层序 .根据新的层序 ,将被动陆缘的演化历史划分为 4个阶段 :大陆拉张阶段 (晚泥盆世至晚石炭世 )、复杂陆缘盆地阶段 (早二叠世 )、洋 -陆转化阶段 (晚二叠世至中三叠世 )和同造山盆地阶段 (晚三叠世 ) .
The Jinshajiang belt is located between the Zhongzan block and the Qamdo block, where sediments of various tectonic settings are preserved, and these strata are shown as slices instead of continuous strata. We select the top-Xiaoruo area in northwest Yunnan, According to the geological mapping of the fault fragments in the passive continental margin of the river belt and the analysis of the epoch and depositional environment of the various stratigraphic fragments, the stratigraphic sequence of the passive margin of the Jinshajiang belt is restored. According to the new sequence , The evolutionary history of passive continental margin is divided into four stages: continental extension (Late Devonian to Late Carboniferous), complex continental basin (Early Permian), ocean-continent transition (late Permian Mesozoic to Middle Triassic) and the same orogenic basin stage (Late Triassic).