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现代地质 ›› 2006, Vol. 20 ›› Issue (3): 429-435.

• 石油地质学 • 上一篇    下一篇

四川盆地北部大巴山山前带构造样式与变形机制

汪泽成,赵文智,徐安娜,李登华,崔 瑛   

  1. 中国石油勘探开发研究院,北京100083
  • 收稿日期:2005-12-23 修回日期:2006-03-05 出版日期:2006-03-20 发布日期:2006-03-20
  • 作者简介:汪泽成,男,高级工程师,博士,1966年出生,石油地质学专业,主要从事石油与天然气地质综合研究。
  • 基金资助:

    国家“973”项目(2001CB209100)

Structure Styles and Their Deformation Mechanisms of Dabashan Foreland Thrust Belt in the North of Sichuan Basin

WANG Ze-cheng, ZHAO Wen-zhi, XU An-na, LI Deng-hua, CUI Ying   

  1. Research Institute of Petroleum Exploration and Development, PetroChina,Beijing100083,China
  • Received:2005-12-23 Revised:2006-03-05 Online:2006-03-20 Published:2006-03-20

摘要:

利用最新的地震和地表地质资料,对四川盆地北部大巴山山前构造进行综合解释。按构造样式差异,将大巴山山前构造带划分出3个构造带:通江—黄金口西NW向潜伏断褶带、五宝场—铁山坡NW—NE向构造交汇带及温泉井—奉节近EW向构造带;其对应的前缘构造样式分别为反冲断层型、褶皱滑脱型及双向冲断—褶皱型。中生代以来的构造变形主要有2期:印支晚期,以NE向褶皱作用为主;燕山中、晚期—喜马拉雅期,以NW向冲断—褶皱作用为主。大巴山前缘构造受不同方向挤压应力联合作用的控制。

关键词: 大巴山前陆盆地, 构造样式, 构造叠加, 冲断—褶皱

Abstract:

By means of the latest seismic data and surface geology, structure styles of Dabashan foreland thrust belt are comprehensively interpreted. According to  the difference in  their styles, three structure belts can be determined:NW buried thrust belt of Tongjiang-Huangjinkou,NW-NE intersection belt of Wubaochang-Tieshanpo,and EW structure belt of Wenquanjing-Fengjie. Correspondingly, front structure styles can be divided into 3 types: back-thrust fault type, folded detachment fault type, and vis-à-vis thrust faulted fold type. There are two main stages of structure deformations since Mesozoic. The first one is Late Indo-Sinian epoch, mainly forming NE folds; the other is Mid-Late Yanshan to Himalaya, mostly developing NW thrust faults. Multi-stages stacked structure deformations are very obvious, and controlled by combined pressure stress in different directions.

Key words: Dabashan foreland basin, structure style, stacked structure, thrust faulted-fold

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