塔里木盆地西北缘柯坪冲断带的构造变形特征  

STRUCTURAL DEFORMATION CHARACTERISTICS OF THE KALPIN THRUST BELT ON THE NORTHWESTERN MARGIN OF THE TARIM BASIN

作　　者：马德明 陈江力[2] 曾昌民[3] 尚新璐[3] 师骏[3] 张现军[3] 敬兵[3] 

机构地区：[1]中国石油东方地球物理公司综合物化探事业部,河北涿州072751 [2]中国石油四川石油管理局地球物理勘探公司,四川成都610213 [3]中国石油塔里木油田分公司勘探开发研究院,新疆库尔勒841000

出　　处：《地质力学学报》2007年第4期340-347,共8页Journal of Geomechanics

摘　　要：柯坪冲断带位于塔里木盆地的西北缘，是南天山南缘冲断系统的一部分。根据野外实际考察和地震剖面解释，总结了该冲断带的构造变形特征：发育于古生界、以寒武系膏盐层为主滑脱层、叠瓦状冲断、暴露式冲断前锋、断层传播褶皱、前展式冲断、形成于上新世——第四纪。根据平衡剖面的恢复，柯坪冲断带的构造缩短量最小为29．1％～40．7％。The Kalpin thrust belt, located at the NW margin of the Tarim basin, is a part of the southern South Tianshan marginal thrust system. On the basis of field investigation and seismic section interpretation, the Kalpin thrust belt has the following structural deformation characteristics： the thrust belt occurs in Paleozoic strata; the major detachment fault occurs in a Middle Cambrian gypsum-salt layer; the thrust sheets are imbricate; various thrust fronts are subaerially exposed; fault propagation folding and piggyback thrusting are found; and the thrust belt formed during .the Pliocene-Holocene According to the reconstructed balanced section, the minimal shortening rate of the thrust belt is 29.1%-40.7 %.

关 键 词：柯坪冲断带 塔里木 南天山 地震剖面 平衡剖面 构造变形 

分 类 号：P542.3[天文地球—构造地质学]