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羌塘-三江构造-地层大区的古生代-中生代沉积盆地和构造演化受特提斯洋的控制.通过综合分析前人对羌塘-三江地区大量岩石地层、生物地层、同位素年代学及构造学等研究资料,对羌塘-三江构造-地层大区各分区古生代-中生代的沉积盆地类型进行了划分,并分析了各个沉积盆地的形成和演化过程,探讨了该区的大地构造演化:早古生代该区主体属于大洋环境;晚古生代随着特提斯洋向南东、北东方向的俯冲,该区开始发育一系列活动陆缘沉积盆地,产生金沙江弧后洋、澜沧江弧后洋和甘孜-理塘弧后洋,形成多岛洋弧盆系;中生代,随着特提斯洋向北东的俯冲消减,弧后洋逐渐闭合,羌塘-三江地区发生大规模弧-弧、弧-陆碰撞增生,逐渐转化成陆.随着白垩纪特提斯洋的闭合,印度板块与中国西部碰撞、造山,羌塘-三江地区发育陆内盆地.
The Paleozoic-Mesozoic sedimentary basins in the Qiangtang-Sanjiang tectono-stratigraphic zone and their tectonic evolution are controlled by the Tethys Ocean.Based on the comprehensive analysis of previous studies on the massive lithostratigraphy, biostratigraphy, isotopic chronology and tectonics in the Qiangtang-Sanjiang area And other research data, the types of sedimentary basins in the Paleozoic-Mesozoic sediments of each division of the Qiangtang-Sanjiang structural-stratigraphic zone are divided, and the formation and evolution of each sedimentary basin are analyzed. The evolution of the tectonic evolution in this area is discussed: the Paleozoic In the Late Paleozoic, with the tectonic subduction of the Tethys Ocean to the south and east and northeast, a series of active continental margin sedimentary basins began to develop in this area, resulting in arc Houyang, Lancang Arc and Yangzi and Ganzi - Litang arc after ocean, the formation of multi-oceanic arc basin system; Mesozoic, with the Tethys ocean to the north-easterly subduction reduction, arc Houyang gradually closed, Qiangtang - Sanjiang area of large-scale arc-arc, arc- After the collision of the continental collision with the western China, the orogeny and the Qiangtang-Sanjiang area developed intracontinental basins.