地质力学学报2012，Vol.18Issue(1)：22-31,10.
苏北盆地海安凹陷现今构造应力场特征及构造样式
FEATURES OF PRESENT STRUCTURAL STRESS FIELD AND STRUCTURAL PATTERN IN HAIAN DEPRESSION, JIANGSU OILFIELD
摘要
Abstract
In this paper, the present structural stress field of T4?reflection layer, the mechanic characteristics and structural active patterns of the second-level fault at the boundary of sub-depression and the third- and forth-level faults within sub-depression in Haian depression were analyzed. The direction of the present maximum principal stress is about NE 70? The present maximum principal stress is about 50 MPa and the present minimum principal stress is about 30 MPa. By the present structural stress field finite element numerical modeling, we found that the second-level faults at the boundary of sub-depression are characteristic of tensile activity or tensile-shear activity which is in both clockwise and counter-clockwise, and that the activity features vary along the different part of a fault. The third- and forth-level faults within sub-depression have the same activity features as the second-level faults. In addition, some third- and forth-level faults also have compressive or compressive-shearing activity features.关键词
现今构造应力场/构造样式/海安凹陷/苏北盆地Key words
present structural stress field/ structural pattern/ Haian depression/ Subei Basin分类
天文与地球科学引用本文复制引用
王章青,李华东,杜二鹏..苏北盆地海安凹陷现今构造应力场特征及构造样式[J].地质力学学报,2012,18(1):22-31,10.基金项目
中国石化江苏石油勘探局科研项目(编号:JS10004) （编号:JS10004）
