地质科学2011，Vol.46Issue(2)：426-444,19.
伸展盆地复杂断块运动学平面复原——以渤海湾盆地廊坊-固安断陷为例
Map-view restoration of kinematics of complex fault-blocks in extensional basin :Insights from the Langfang-Gu'an fault-sag in Bohaiwan Gulf Basin, China
摘要
Abstract
This paper uses map-view restoration of Langgu fault-sag to study the characteristic of the fault blocks in fault-blocks in extensional basin. According to the segments of Daxing fault, the study area is divided into three zones: southwest zone, middle zone and northeast zone.According to the characteristic of fault-blocks' rotation, middle zone is divided into middle-south zone and middle-east zone. The movement of each zone is different. After the map-view restoration of the fault-blocks of Paleogene in Langgu sag, we have found that, the fault-blocks in southwest zone mainly rotate by clockwise, and the direction of displacement is southeast to northwest; in middle zone, the fault-blocks in middle-south zone mainly rotate by clockwise while in middle-east zone by anticlockwise, and the direction of displacement is northwest to southeast, and the displacement decreases from middle to the tips; in northeast zone, the faultblocks mainly rotate by anticlockwise except that in second member of Shahejie group, and the direction displacement is nearly south to north. The direction of displacement in southwest zone and northeast zone is nearly similar but different from that in middle-east zone, which we think has relation with the segments of Daxing fault. The different rotation between middle-south zone and middle-east zone results from the unbalanced stress which decreases from middle to the tips.关键词
廊固凹陷/伸展盆地/大兴断层/古近系/平面恢复/复杂断块/平面运动Key words
Langgu sag/ Extensional basin/ Daxing fault/ Paleogene/ Map-view restoration/ Complex fult-bloeks/ Movement in plane分类
天文与地球科学引用本文复制引用
桂宝玲,何登发,闫福旺,张文君..伸展盆地复杂断块运动学平面复原——以渤海湾盆地廊坊-固安断陷为例[J].地质科学,2011,46(2):426-444,19.基金项目
国家重点基础研究发展计划项目(编号:2006CB202300)和国家自然科学基金重点项目(编号:40739906)资助. （编号:2006CB202300）
