海洋地质前沿2024，Vol.40Issue(3)：1-13,13.DOI:10.16028/j.1009-2722.2023.085
渤海海域印支期构造变形分带性及其特征的数值模拟研究
Numerical simulation study on the zonation of Indosinian tectonic deformation and its characteristics in the Bohai Sea
摘要
Abstract
The Indosinian movement laid the foundation for the formation of the present-day tectonic pattern in the Bohai Sea,which led to the formation of three major recoil zones within the Bohai Sea.The pre-existing faults and slip sheets within the Bohai Sea basement may have played an important role in this process,but the mechan-ism of how they affect the tectonic deformation and zonation characteristics of the Indochina in the Bohai Sea is not clear.In order to address these questions,this paper presents a detailed study of the tectonic deformation dur-ing the Indosinian period in the Bohai Sea based on seismic section data combined with the 2D thermodynamic numerical simulation code LaMEM.The simulation results reveal that,under the condition of pre-existing faults,when there is no slip layer in the basement or it is not stepped in the Bohai Sea,the three recoil centers will not be formed in the Bohai Sea;but when the slip layer in the basement is stepped in the southwestern part of the Bohai Sea,Bozhong Sag and Liaodong Sag,the stress is transmitted through the slip layer in the basement and the three recoil centers are formed in the Bohai Sea.The three recoil centers and lead to the development of large-scale re-coil faults and fold deformation inside the Bohai Sea,which is in good agreement with the seismic profile.The nu-merical simulation results confirm that the pre-existing faults and slip layers in the basement are important factors controlling the tectonic zonation and tectonic deformation characteristics in the Bohai Sea.At the same time,the multi-reverse center evolution model also provides an important reference to explain the formation and evolution process of present-day Longmen Mountains and Sichuan Basin.关键词
渤海海域/印支期/先存断层/滑脱层/构造分带性/数值模拟Key words
Bohai Sea area/Indosinian/pre-existing faults/detachment/tectonic deformation/numerical simula-tion分类
海洋科学引用本文复制引用
王迪,戴黎明,吴昊明,张参,李法坤,董昊,王亮亮..渤海海域印支期构造变形分带性及其特征的数值模拟研究[J].海洋地质前沿,2024,40(3):1-13,13.基金项目
崂山实验室科技创新项目"基于数字孪生的全球深时地貌重塑与资源环境预测"(LSKJ202204400) （LSKJ202204400）
国家自然科学基金(42176064,91958214,42121005) （42176064,91958214,42121005）
山东省泰山学者攀登计划(tspd20210305) （tspd20210305）
青岛市创新领军人才计划项目(19-3-2-19-zhc) （19-3-2-19-zhc）
中央高校基本科研业务费专项项目(202161011) （202161011）
