松辽盆地T11界面的地质属性及其形成机制  

Geological Attributes and Formation Mechanism of T11 Boundary in Songliao Basin

作　　者：宋鹰[1] 阳怀忠[1] 

机构地区：[1]中国地质大学构造与油气资源教育部重点实验室,湖北武汉430074

出　　处：《昆明理工大学学报（理工版）》2010年第1期1-8,13,共9页Journal of Kunming University of Science and Technology(Natural Science Edition)

基　　金：构造与油气资源教育部重点实验室基金资助(项目编号:TPR-2009-15)

摘　　要：以地震剖面的精细构造解释和钻井资料分析为基础,对松辽盆地姚家组毒山口组的底界面T11特征展开详细研究.研究表明:在该界面之下地层内发育了4组微幅隆起褶皱带,且沿该界面发育了的红色古土壤层.这些特征揭示了T11界面是发育在盆地裂后热沉降期内的一个具有挤压背景的区域性角度不整合面.该界面的形成发育与周缘板块重组事件在时间上具有一致性,在成因上具有耦合性.因此,松辽盆地T11界面是晚白垩纪太平洋板块与欧亚板块构造重组事件在松辽盆地内的响应界面.Based on interpretation and analysis of seismic and well drilling data in Songliao Basin, the characteris- tics of T11 and the bottom boundary of Yaojia Formation are elaborately described and studied. The four fold belts （large-scale, broad, low- relief, north- east- north- trending） and thrust systems are distinguished through the analysis. It is indicated through these characteristics that the regional angular unconformity T11 was formed in a compressional regime during the post - rift thermal subsidence of Songliao Basin. T11 boundary was formed dur- ing the period of late Cretaceous （about 88.5Ma）. This is in consistence with the time of a great reorganization of plate tectonic in the Mesozoic time. It is therefore argued that the Tll bottom boundary of Yaojia Formation in Songliao Basin is the responding surface to interaction between Pacific plate and Eurasian plate in late Mesozoic.

关 键 词：松辽盆地 不整合面 地震剖面 

分 类 号：TE121.1[石油与天然气工程—油气勘探]