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祁连-柴达木构造域盆地-造山带耦合构造体系 被引量:15

On Basin Orogenic Belt Coupled Structural System in Qilian Qaidam Structural Domain.
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摘要 提出了祁连-柴达木构造域主要盆地与周边山系“既是构造变形间的相互约制,又是物质间的相互补给的双重耦合关系”的新立论。其基本内容为:盆地-造山带耦合构造体系以壳内拆离伸展为动力;盆地深层拆离伸展向造山带楔入(俯冲),为盆地拉张坳陷创造条件;造山带的浅层则以倒退式依次变新向盆地多期次、多层次逆冲-推覆(仰冲)并伴随走滑控制盆地浅层构造变形。壳内物质随水平拆离伸展,沿低速高导层由盆地向造山带转移,由于受造山带地壳增厚效应的约制,物质也随之转为垂直伸展方向转移。形成了盆地深部物质向造山带补给,造山带浅层向盆地提供沉积物源,从而达到盆地-造山带体系的物质平衡。 Zhou Yanru Li Xiangbo Yuan Jianying Zhou Yanru Senior Engineer Petroleum Geology Northwest Institute of Geology CNPC Lanzhou 730020 China .Abstract This paper proposed a new argument that major basins in Qilian-Qaidam structural domain have such dual coupled relations with surrounding mountain systems as not only restrictions to each other among structural deformation but mutual replenish among materials. The main contents are as follows Basin orogenic belt coupled structural system is dominated by separation and extension within crust as its dynamic forces in deep basin the separation or extension was toward orogen to subduction providing necessary conditions for basin's extension depression the shallower strata of orogen were overthrusting napping obduction toward the basin by multiphase and multilevel in the form of going backwards in order and associated with deformation of shallow structures in the slip controlled basins crust materials occurred horizontal separation and extension followed by transition into orogenic belts from low velocity and high conducting layers and by restriction of crust thickening effects in the belts the materials' transition appeared vertical extension shaping the framework of supplementing deep basin's material toward the belts in which shallow strata provided sediments for the basins. Finally the material balances were formed in the basin orogen system.
出处 《新疆石油地质》 CAS CSCD 2000年第5期387-390,共4页 Xinjiang Petroleum Geology
关键词 柴达木盆地 区域构造 盆地 造山带 耦合构造体系 Qaidam basin Qilian Mountains Regional structure Basin Structural system Tectonic evolution Coupling
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