Cenozoic structural deformation and dynamic processes of the Bohai Bay basin province, China
Cenozoic structural deformation and dynamic processes of the Bohai Bay basin province, China
复制标题
渤海湾盆地新生代构造变形与动力过程
DOI：
10.1016/j.marpetgeo.2009.08.012
复制
发表时间：
2010-04-01
影响因子：
4.2
通讯作者：
Yang, Qiao
中科院分区：
文献类型：
--
作者：
Qi, Jiafu;Yang, Qiao
渤海湾盆地省的新生代构造可细分为11个伸展体系和3个走滑体系。伸展体系由正断层和转换断层组成。正断层主要呈北北东向和北东向展布，其产状在不同构造环境中有所变化。古近纪裂谷亚盆地发育在很可能是生长断层的正断层的上盘。新近纪 - 第四纪地层沉积在裂谷亚盆地和地垒中，形成了一个统一的盆地省。伸展体系被3个北北东向的右旋走滑体系（断裂带）叠加。尽管在某些剖面中走滑断裂带的主位移带（PDZ）仅发育在基底和盆地下部地层中，但盆地上部地层的构造变形特征也表明它们是涉及基底的右旋走滑断裂带。根据断层与沉积地层的关系，伸展体系主要发育于古新世中期至渐新世晚期，而走滑体系主要发育于渐新世至中新世。随着伸展变形减弱，走滑变形加剧。伸展变形源于热地幔物质上涌引起的水平拉张，而走滑变形可能与板块运动引起的区域应力场有关。（C）2009爱思唯尔有限公司。保留所有权利。
Cenozoic structures in the Bohai Bay basin province can be subdivided into eleven extensional systems and three strike-slip systems. The extensional systems consist of normal faults and transfer faults. The normal faults predominantly trend NNE and NE, and their attitudes vary in different tectonic settings. Paleogene rifting sub-basins were developed in the hanging walls of the normal faults that were most likely growth faults. Neogene-Quaternary sequences were deposited in both the rifting sub-basins and horsts to form a unified basin province. The extensional systems were overprinted by three NNE-trending, right-lateral strike-slip systems (fault zones). Although the principal displacement zones (PDZ) of the strike-slip fault zones are developed only in the basement and lower basin sequences in some cross sections, the structural deformation characteristics of the upper basin sequences also indicate that they are basement-involved, right-lateral strike-slip fault zones. According to the relationships between faults and sedimentary sequences, the extensional systems were mainly developed from the middle Paleocene to the late Oligocene, whereas the strike-slip systems were mainly developed from the Oligocene to the Miocene. Strike-slip deformation was intensified as extensional deformation was weakened. Extensional deformation was derived from horizontal tension induced by upwelling of hot mantle material, whereas strike-slip deformation was probably related to a regional stress field induced by plate movement. (C) 2009 Elsevier Ltd. All rights reserved.