豫西南一带晚白垩世盆地构造特征及发展演化  

Tectonic Features and Evolution of Late Cretaceous basin in Southwest area of Henan Province

作　　者：张发梁 周世全[2] 

机构地区：[1]河南栾川县蒙克老安沟铅锌矿,河南洛阳471000 [2]河南省地质矿产勘查开发局第一地质勘查院,河南南阳473000

出　　处：《资源导刊（地球科技版）》2013年第9期4-7,共4页

摘　　要：豫西南一带的晚白垩世盆地分布于东秦岭造山带内，在后遣山阶段形成的一系列NW—SE向中新生代地壳表层断陷一拉分盆地，被配置在不同的大地构造单元之上，主要类型有断陷式、断坳式和混合型5种盆地。盆地两侧或一侧发育长期活动的走滑剪切大断裂，边界可划分为断裂、角度不整合和复合边界5种。盆内发育不同尺度的正断层、褶皱，并有不同程度的扩张。盆地形成于总体挤压、局部引张的构造应力场中，并经历了多次挤压、拉张的转换，具有我国东部中新生代成盆机制与发展演化的特点。Located in eastern Qinling Mountain orogenic belt, late cretaceous basin in southwest area of Henan Province forms a series of NW-SE to Cenozoic crustal surface rifting pull-apart basins in the post orogenic stage. Configured on the different tectonic units, three main types of late cretaceous basin are fault depression, depression type and mixed type. Strike slip shear fault basin develops along both sides or one side of long activity and its boundary can be divided into the following three types： fault, unconformity and complex boundary. Normal faults, folds of different scales develop in the basin and they share varying degrees of expansion. Since it is formed in the structure stress field of overall extrusion and partial extension and has experienced a number of compressions, tensile conversion, the basin presents Cenozoic basin mechanism and evolution characteristics.

关 键 词：东秦岭造山带 断陷盆地 类型 构造特征 中新生代 

分 类 号：P544.4[天文地球—构造地质学]