花岗岩体的冲断变形——以酒泉盆地东部金佛寺花岗岩为例  

The Thrust Deformation of Pluton: Take the Jinfosi Pluton in Eeasten Jiuquan Basin as an Example

作　　者：吴建勇[1] 唐其升[1] 陈汉林[1] 肖安成[1] 程晓敢[1] 毛启明[1] 

机构地区：[1]浙江大学地球科学系,浙江杭州310027

出　　处：《高校地质学报》2006年第1期22-29,共8页Geological Journal of China Universities

摘　　要：根据对酒泉盆地东部金佛寺花岗岩体野外变形特征调查和地震剖面解释的研究,分析了金佛寺花岗岩体受后期区域构造作用的冲断变形特征,认为该岩体在晚新生代以来发生了强烈的冲断作用,岩体平均推覆距离大于15km。在主冲断层和次级冲断层的控制下,岩体内部发生了强烈的构造变形,形成了复杂的断层传播褶皱。主逆冲断层的下盘掩覆了酒泉盆地中、新生代前陆坳陷的一部分,发育了一受控于深部滑脱断层的断层传播褶皱。This paper analyzes the thrust deformation features of the Jinfosi pluton in the eastern Jiuquan Basin which were controlled by the effect of later regional structure, and presents the deformation mode of the pluton, based on investigating the field deformation features and interpreting the seismic profiles which passed the pluton. The authors consider that Jinfosi pluton was influenced by intensive thrusting action, and the average distance of thrusting was more than 15 km. Controlled by the main thrust fault and secondary thrust faults, the interior pluton was deformed intensively, and a complex fault-propagation fold was formed. Under the main thrust fault is a part of the Mesozoic and Cenozoic foreland depression of Jiuquan Basin.

关 键 词：金佛寺岩体 地震解释 构造变形 甘肃酒泉 

分 类 号：P542[天文地球—构造地质学]