COLLISIONAL STRUCTURES AND BASINAL DEFORMATION IN THE NORTH QAIDAM BASIN
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摘要: 印度板块与亚洲板块在渐新世和中、上新世发生碰撞及持续的榨挤作用,所产生的远程效应,使南祁连造山带的逆冲岩席向柴达木盆地北缘逆冲推覆。在柴达木北部中、新生代盆地发生了二个世代的改造变形。从赛什腾—尕丘前渊断陷带的叠瓦状冲断层与断弯褶皱构造组合,到昆特依斜坡坳陷带的犁式逆掩断层与断展褶皱组合,直至鄂博梁—伊北一带的滑脱断层与滑脱褶皱构造组合,呈现了递进变形的规律。Abstract: As a result of the collision of Indian plate and Asian plate during the Oligocene and the Miocene-Pliocene and the continuing squeezing, the thrust sheets of the South Qilan Orogenic Belt advanced to the northern margin of the Qaidam Basin. The Meso-Cenozoic basin in the North Qaidam underwent two generations of deformation. It was characterized by progressive deformation from the imbricate thrust and fault-folded structures in the Saishenteng-Gaqiu Frontal Faulted Zone to the listric thrust fault and fault-folded structures in the Kunteyi Slope Depression Zone, and then to the decollement fault and fold structures in the Eboliang-Yibei area.
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Key words:
- basinal deformation /
- collisional structure /
- the North Qaidam Basin
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