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| 雪峰山西侧贵州地区中生代构造特征及其演化 | |
| 引用本文： | 刘丽萍,李三忠,戴黎明,王岳军,刘博,金宠,张国伟.雪峰山西侧贵州地区中生代构造特征及其演化[J].地质科学,2010,45(1). |
| 作者姓名： | 刘丽萍 李三忠 戴黎明 王岳军 刘博 金宠 张国伟 |
| 作者单位： | 1. 海底科学与探测技术教育部重点实验室,青岛,266100;中国海洋大学海洋地球科学学院,青岛,266100 2. 中国科学院广州地球化学研究所,广州,510640 3. 西北大学,西安,710069 |
| 基金项目： | 中国石化总公司重大科技攻关项目"中国南方(中上扬子)大陆构造与海相油气前景" |
| 摘 要： | 贵州中生代变形主要发生在燕山期,发育三幕褶皱变形、两幕逆冲和三幕走滑。根据区域对比、卷入褶皱的地层和褶皱间的叠加关系,判断三期褶皱的形成顺序依次为近东西向、北东向和南北向,时限在J_3—K_2之间。逆冲推覆构造主要由向北西或西逆冲的近南北向逆冲断层组成,大体与南北向褶皱同时形成;自雪峰构造带西缘向西,依次划分出根部带、中部带和前锋带。但是,在根部带识别出两幕逆冲推覆,其它两带各识别出一幕。走滑断层也有3个方向:东西向、北东向和近南北向。东西向走滑断层呈现出右行压扭的运动学特征,而大多数北东向走滑断层是左行张扭性质的。依据各个方向断层间的切割和限制关系,推测东西向走滑断层最早形成,其次是南北向逆冲断层,北东向走滑断层最晚活动。这些断裂和褶皱特征,总体表现出贵州多重多种复合联合的构造特征,最后,探讨了本区的构造成因模式。 |
| 关 键 词： | 雪峰山 燕山期 褶皱 逆冲推覆 成因模式 |
Structural characteristics and evolution in Guizhou Province,west of Xuefeng Mountain |
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| Liu Liping,Li Sanzhong,Dai Liming,Wang Yuejun,Liu Bo,Jin Chong,Zhang Guowei.Structural characteristics and evolution in Guizhou Province,west of Xuefeng Mountain[J].Chinese Journal of Geology,2010,45(1). | |
| Authors: | Liu Liping Li Sanzhong Dai Liming Wang Yuejun Liu Bo Jin Chong Zhang Guowei |
| Abstract: | The main Mesozoic deformation in the Guizhou Province is Yanshanian three-stage folding,two-stage thrusting and three-stage strike slipping.Three-stage folds of different strikes are divided based on their newest-involved strata in these folds and their superposition relationship.The earliest is nearly EW-striking folds,and the second is NE-striking folds,followed by the N-S-striking folds.The folds formed between Late Jurassic and Late Cretaceous.The thrust fault system consists of the top-to-northwest or top-to-west,NS-striking thrust faults coeval to the NS-striking folds.To the west of west margin of the Xuefeng basement,the thrust belt can be divided into three sections:the root zone,the middle zone and the frontal zone from the east to the west.It underwent two-stage thrusting in root zone.However,there is only one-stage thrusting in the other two zones.Three-stage,differentlyoriented strike-slip faults extend spatially parallel to axes of three folds and temporally later than the equivalent folding,respectively.EW-striking strike-slip faults are dextral and transpressional.However,NE-striking strike-slip faults are almost sinistral and transextenional.According to their intersection and confinement among these faults,it is obvious that EWstriking strike-slip faults occurred at the earliest stage,followed by NS-and NE-striking ones in sequence.At last,a possible dynamic model about deformation in Guizhou is proposed. |
| Keywords: | Xuefeng Mountain Yanshanian Folds Thrust faults Genetic model |
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