| 青藏高原中部色林错—伦坡拉逆冲推覆构造系统 |
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| 关键词:Paleogene depression Lunpola Basin Silin Co Basin thrust central Tibetan Plateau |
| 基金项目:中国地质调查局地质矿产调查评价项目“羌塘盆地油气地质构造保存条件研究”(编号: 1212011221111)；“西藏羌塘盆地油气地质构造保存条件调查”(编号: 12120115000901) |
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| The Siling Co–Lunpola Thrust Systems in the Central Tibetan Plateau |
| Field geological survey and seismic reflection profiling have revealed three regional thrust systems in the Siling Co–Lunpola Paleogene depression and its adjacent areas. Each thrust system consists of reverse faults, thrust sheets, nappes, structural windows and folds. The Serbug Co–Zajiazangbu thrust, the Northern Lunpola duplex thrust and the Siling Co–Wuru Co thrust were formed along the Bangoin–Nujiang Suture, the northern Lunpola Basin and the northern margin of the Lhasa Block, respectively. The minimal displacement of each thrust system is estimated to be 38~50 km. Southward thrust occurred on the southern margin of the Qiangtang Block, and northward thrust occurred on the northern margin of the Lhasa Block. Such tectonic movement resulted in intense folding of the Lunpola Basin and the Paleogene lacustrine strata, forming the Lunpola syncline as wide as 20 km. The Siling Co–Lunpola thrust was initiated in Late Cretaceous and intensified in the Paleogene, and the frontier thrust and lower detachment faults were formed in the late Paleogene–Early Miocene. The Paleogene thrust along the Bangoin–Nujiang Suture controlled the sedimentary depression, the hydrocarbon source rock evolution, and the formation and preservation of oil reservoirs in the Lunpola and Siling Co Basins. |
| WU Zhen-han,ZHAO Zhen,YE Pei-sheng,JI Chang-jun.2016.The Siling Co–Lunpola Thrust Systems in the Central Tibetan Plateau[J].Acta Geoscientica Sinica,37(4):441-448. |
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