秦南‒石臼坨凸起中生代伸展断层继承性及其对潜山形成的控制作用  

Origin and Evolution of Mesozoic Extensional Faults and Their Control on Buried-hills in the Qinnan-Shijiutuo Uplift

作　　者：杨宇 赵淑娟[1,2] 朱文森 王晨杰 张江涛 戴黎明 李法坤[1,2] 占华旺 李金月 李三忠 YANG Yu;ZHAO Shujuan;ZHU Wensen;WANG Chenjie;ZHANG Jiangtao;DAI Liming;LI Fakun;ZHAN Huawang;LI Jinyue;LI Sanzhong(Frontiers Science Center for Deep Ocean Multispheres and Earth System,MOE Key Lab of Submarine Geosciences and Prospecting Techniques,College of Marine Geosciences,Ocean University of China,Qingdao 266100,Shandong,China;Laboratory for Marine Mineral Resources,Laoshan Laboratory,Qingdao 266237,Shandong,China;CNOOC China Limited,Tianjin Branch,Tianjin 300452,China)

机构地区：[1]深海圈层与地球系统教育部前沿科学中心,海底科学与探测技术教育部重点实验室,中国海洋大学海洋地球科学学院,山东青岛266100 [2]崂山实验室,海洋矿产资源评价与探测技术功能实验室,山东青岛266237 [3]中海石油(中国)有限公司天津分公司,天津300452

出　　处：《大地构造与成矿学》2025年第2期285-297,共13页Geotectonica et Metallogenia

基　　金：崂山实验室科技创新项目(LSKJ202204400);中国海洋石油有限公司项目(CCL2021TJT0NST0525)联合资助。

摘　　要：为探明秦南‒石臼坨凸起区域中生代的构造演化,并为渤海海域潜山油气的勘探与开发提供理论支持,本文通过对研究区最新三维地震数据进行深入构造解析和对典型地震剖面进行平衡恢复,揭示研究区伸展断层的继承性活动及其对潜山的控制作用。研究发现,印支期近SN向挤压形成NWW-近EW向的逆冲推覆断层,这些断层在燕山早期持续活动,并在燕山中期发生负反转。近SN向的伸展导致太古宇基底的裂离,以及石南凹陷、秦南凹陷和427凹陷的初始形成。以石东断裂为界,可以将研究区分为东西两侧,在印支期,西侧表现为叠瓦式逆冲,东侧则为对冲构造样式。在燕山中期,伸展断层的继承性活动导致西侧表现为向南的单向拆离,而东侧则是以428构造为界的反向拆离。Exploring the tectonic evolution of the Qinnan-Shijiutuo Uplift during the Mesozoic could provide a theoretical basis for the oil and gas exploration of buried-hills in the Bohai Sea area.Based on the detailed structural analysis of the latest 3D seismic data and the balanced restoration of typical seismic profiles,we revealed the inherited activity of extensional faults and their control on buried-hills in the study area.The results showed that the NWW-EW trending thrust-nappe faults were formed by the nearly North-South compression during the Indosinian period.These faults continued thrusting during the early Yanshanian period,and were negative inverted during the middle Yanshanian period.The nearly North-South extension generated the separation of the Archean basement and the initial formation of the Shinan,Qinnan and 427 sags.The Shidong Fault was the boundary fault between the western and eastern parts which were characterized by imbricate thrusting faults and ramp faults during the Indosinian period,respectively.During the middle Yanshanian period,the inheritance activity of extensional faults led to a uniform southward detachment in the western part and an opposite detachment bounded by the 428 structure in the eastern part.

关 键 词：伸展拆离 渤海海域 中生代 继承改造 构造演化 

分 类 号：P548[天文地球—构造地质学]