【摘要】 塔里木、柴达木显生宙盆地演化经历了3个开合旋回,即震旦纪—中泥盆世(Z—D2)开合旋回、晚泥盆世—三叠纪(D3—T)开合旋回和侏罗纪—第四纪(J—Q)构造旋回,可能与古亚洲洋和特提斯洋在不同阶段伸展张裂、俯冲消减和闭合作用有关。塔里木、柴达木显生宙盆地演化可进一步划分为6个演化阶段:震旦纪—早奥陶世为克拉通内裂陷盆地阶段,中奥陶世—中泥盆世为克拉通内挤压盆地阶段熏晚泥盆世—早二叠世为弧后裂陷盆地阶段,晚二叠世—三叠纪为弧后前陆盆地阶段熏侏罗纪—古近纪为前陆盆地阶段,新近纪—第四纪在塔里木前陆盆地性质明显,而在柴达木则表现为强烈挤压坳陷。更多还原

【Abstract】 The Phanerozoic evolution of the Tarim and Qaidam basins has experienced three opening-clos-ing cycles ,i.e. :the Sinian-Middle Devonian ,Late Devonian-Triassic and Jurassic-Quaternary opening-closing cycles.The cyclicity of the basin evolution may be related to extension ,subduction and collision of the Paleo-Asian ocean and Paleo-Tethys ocean in different stages.Six evolutionary stages of the Tarim and Qaidam basin in Phanerozoic time may be recognized-these are :( 1 ) the Sinian-Early Ordovician intra-cratonic extensional basin stage ,( 2 ) the Middle Ordovician-Middle Devonian intra-cratonic compressional basin stage ,( 3 ) the Late Devonian-Early Permian back-arc extensional basin stage ,( 4 ) the Late-Permi-an-Triassic retro-arc foreland basin stage ,( 5 ) the Jurassic-Paleogene foreland basin stage ,and ( 6 ) the Neogene-Quaternary stage of the Tarim foreland basin and Qaidam compressional depression.更多还原