THE YITONG GRABEN-THE STRUCTURAL FEATURES AND EVOLUTION OF A STRIKE-SLIP FAULT BASIN
-
摘要: 伊通地堑是一个主体在海西期褶皱基底上发育起来的第三纪含油气走滑断陷盆地。它具有狭长不对称的地堑结构,断裂构造复杂,发育有正滑动断裂和逆滑动断裂。张扭和压扭共同作用所形成的复合型叠加构造为其主要构造样式。地堑的形成演化经历了初始断陷期、主断陷期和重新活动期3个阶段。地堑在形成过程中,由于边界断裂的限制造成应力不均匀分布,导致地堑内部东西差异沉降和南北隆凹相间,沉降中心和沉积中心随着断裂活动期次的不同而发生迁移。Abstract: The Yitong Graben is a Tertiary petroliferous strike-slip fault basin developed on the Hercynian fold basement.It has long and narrow asymmetric graben structure.Its fault structure is complex,developing normal-slip faults and reverse-slip faults.The compound superimposed structure formed by the joint action of tenso-shearing and compresso-shearing is its main structural pattern.The formation and evolution of the graben includes initial fault depression,main fault depression and renew action three stages. During the formation of the graben,the inhomogeneous distribution of stress due to the restriction of boundary faults resulted in differential subsidence between east and west and uplift and sag interval change from south to north within the graben,the depocenter and the subsidence center migrating with different faulting stages.
-
[1] Allen P A,Allen J R.Basin analysis-principles and applications[M].Oxford London:Blackwell Scientific Publication,1990.115-140. [2] 王义天,李继壳.走滑断层作用的有关构造[J].地质科技情报,1999,18(3):30-34. [3] 王燮培,费琪,张家桦.石油勘探构造分析[M].湖北武汉:中国地质大学出版社,1990.132-172. [4] 陈发景.裂谷构造的形成、演化和油气分布[J].地质科技情报,1984,3(3,4):89-94,91-96. [5] 王燮培,等.中国含油气盆地中花状构造的发现及其石油地质意义[J].地质科技情报,1989,8(2):59-65. [6] Hao Fang,Chen Jianyu,Sun Yongchuan,et al.Application of organic facies studies to sedimentary basin analysis-a case study from the Yitong Graben[J].Organic Geochemistry,1993,19: 27-43. [7] Xie Xinong,et al.Depositional model and tectonic evolution of tertiary transform extensional basin in northeast China-case study on Yitong and Damintun Graben[J].Journal of China University of Geosciences,1997,36(8):771-784. [8] 李思田.论沉积盆地分析系统[J].地球科学,1992,17(增刊):31-39. [9] 孙自明,等.三塘湖盆地构造特征与有利勘探方向[J].石油实验地质,2001,23:23-26. -
计量
- 文章访问数: 869
- HTML全文浏览量: 82
- PDF下载量: 610
- 被引次数: 0
下载:
苏公网安备32021102000780号