贝尔凹陷苏德尔特构造带的形成与演化  

The formation and evolution of Sudeerte tectonic belt in Beier depression

作　　者：谢昭涵[1,2,3] 鲜地 罗静爽 杨宝泉 乐靖 王少波[6] 

机构地区：[1]东北石油大学CNPC断裂控藏研究室,黑龙江大庆163318 [2]东北石油大学"非常规油气成藏与开发"省部共建国家重点实验室培育基地,黑龙江大庆163318 [3]黑龙江省科技创新团队"断裂变形、封闭性及流体运移",黑龙江大庆163318 [4]中海油研究总院,北京100028 [5]大庆油田有限责任公司第二采油厂,黑龙江大庆163256 [6]中国石油大港油田公司勘探开发研究院,天津300280

出　　处：《中国地质》2016年第4期1266-1279,共14页Geology in China

基　　金：高等学校博士学科点专项科研基金项目“海拉尔-塔木察格盆地被动裂谷盆地成因机制研究”(20112322120002);“断层变形、封闭性及与流体运移”科技创新团队(已批复,批号暂无);东北石油大学研究生创新科研项目“贝尔凹陷断裂演化特征及控藏作用”(YJSCX2015-004NEPU)资助~~

摘　　要：苏德尔特构造带是海拉尔盆地贝尔凹陷的重要油气聚集带之一。使用平衡剖面技术和基于斜向剪切模型的人字形桁架法对苏德尔特构造带及其两侧的贝西断陷和贝中断陷进行了详细的构造几何学和运动学解析,认为在南屯期近SN向伸展,形成近EW向断陷盆地群之后,又叠加了大磨拐河组早期的短时间NW向伸展,以及此后的坳陷沉降,才形成了苏德尔特构造带特殊的构造样式。贝中断陷的东侧边界断层是整个贝尔凹陷在大磨拐河组早期伸展的主干边界断层,并且断层面具有坡坪式特征。苏德尔特构造带是发育于第一阶断坪上部的"滚动背斜",是重力和边界断层几何形态共同控制的结果,形成机制属于重力影响下的横弯褶皱作用,而非侧向挤压引起的纵弯褶皱作用。The Sudeerte tectonic belt is one of the most important hydrocarbon accumulations in Beier depression of Hailar basin.From the detailed structural geometry and kinematics analysis of Sudeerte tectonic belt and peripheral Beixi subdepression andBeizhong subdepression using balanced section technique and herringbone truss method based on inclined shear model, the authorsdetected that the special structure style was caused by a series of extensions： the direction of extension in Nantun Formation wasnearly NW- striking, forming an EW- trending rift basin group, then the direction changed to northwest in a short period of earlyDamoguaihe Formation stretching and continued thermal depression to the present. The boundary faults in the east of Beizhongsubdepression were the major boundary faults of Beier depression in the extension of early Damoguaihe Formation, and show aramp-flat listric feature. Sudeerte tectonic belt is ＂roll-over anticline＂ formed in the upper part of the first fault floor due to thecombined effect of gravity and geometry of boundary fault. It is thus held that the mechanism of anticline type of Sudeerte tectonicbelt is bending fold rather than buckle fold.

关 键 词：贝尔凹陷 苏德尔特构造带 构造演化 坡坪式断层 滚动背斜 

分 类 号：P618.13[天文地球—矿床学]