黔南地区古生代正断层对构造特征的制约  

Constraints of Paleozoic Normal Faults on Structural Characteristics in South Guizhou

作　　者：崔敏[1,2] 汤良杰[1,2] 郭彤楼[3] 田海芹[3] 

机构地区：[1]中国石油大学盆地与油藏研究中心,北京102249 [2]中国石油大学油气资源与探测国家重点实验室,北京102249 [3]中国石化勘探南方分公司,四川成都610041

出　　处：《现代地质》2009年第3期409-413,共5页Geoscience

基　　金：国家“973”计划项目(2005CB422107);国家自然科学基金项目(40672143);高等学校博士学科点专项科研基金项目(200804250001)

摘　　要：黔南地区发育东西向的古生代正断层以及南北向的中、新生代逆冲断层和褶皱。通过对地层、褶皱和断层的平面展布、野外地质调查以及地震剖面的解释,结合雪峰隆起的逆冲推覆特征,研究黔南地区古生代正断层对构造特征的制约作用。研究结果表明东西向的古生代正断层在中、新生代的构造变形过程中起构造转换带的作用。通过建立区内构造转换带的几何学模型,对地震线上的构造变形特征进行了解释。在构造转换带(正断层)附近,断层上盘逆冲推覆不明显;在远离断层处,逆冲断层和与断层相关的褶皱发育。随着距离断层面越来越远,构造转换带(正断层)下盘地层的逆冲推覆特征逐渐消失。The east-west Paleozoic normal faults are well developed in South Guizhou, as well as the Mesozoic and Cenozoic of the north-south thrust faults and folds. According to the planar distribution of the strata, fold and fault, field observation and interpretation of seismic profiles, the constraints of Paleozoic normal faults on structural characteristics are studied, combined with the thrust of Xuefeng Uplift. The results show that the Paleozoic east-west normal faults took effect as the transfer zone during the process of Mesozoic and Cenozoic deformation. The structural characteristics of seismic section are interpreted by the geometry model of transfer zone established in this region. The fault displacement increases around the fault plane in the hanging wall of the transfer zone （normal fault）. Conversely, the fault displacement decreases along the distance from fault plane in the footwall of transfer zone （ normal fault） or vanish.

关 键 词：构造转换带 正断层 构造继承 构造特征 雪峰隆起 黔南地区 

分 类 号：TE121.2[石油与天然气工程—油气勘探]