海洋地质前沿2024，Vol.40Issue(7)：25-35,11.DOI:10.16028/j.1009-2722.2023.243
渤海湾盆地辽东-渤东凸起构造带地质结构与形成演化
Geological architecture and tectonic evolution of Liaodong-Bodong Uplift tectonic belt,Bohai Bay Basin
摘要
Abstract
To clarify the formation and evolution process of Liaodong-Bodong Uplift tectonic belt and its rela-tionship with oil and gas in Bohai Bay Basin,by combining the latest three-dimensional seismic data in the study area,the tectonic characteristics and the uplift time of the tectonic belt was analyzed in detail,the structural de-formation characteristics were compared,and the difference in the uplift time was determined,based on which the formation type and evolution model of the tectonic belt was established.It is considered that the Bodong Low Up-lift in the tectonic belt is mainly controlled by the extensional fault,while the Liaodong Uplift is mainly con-trolled by the early extensional fault and the late strike slip fault.Except for the Liaodong Fault,all the main faults in the tectonic belt started to move in the sedimentary period of the Kongdian Formation and the fourth member of Shahejie Formation,or the Sha-4 Member for short,and the peak period is from the sedimentary period of Sha-3 Member and Dongying Formation,and the fault activity was relatively weak after the deposition of Guantao Formation.The uplift time of the tectonic belt rose gradually from south to north:Bodong Low Uplift rose at the end of the deposition of the Sha-4 Member,the southern section of Liaodong Uplift rose at the end of the depos-ition of the Sha-3 Member,and the northern section of Liaodong Uplift rose at the end of the deposition of the third member of Dongying Formation(or Dong-3 Member in short).The tectonic evolution could be divided into six stages:sedimentary period the Kongdian Formation to Sha-4 Member,sedimentary period of the Sha-3 Mem-ber,sedimentary period of the Sha 1 and 2 Members,sedimentary period of the Dong 3 Member,the end of the Dongying Formation,and the present.The tectonic evolution is closely related to the migration and accumulation of oil and gas.The formation time of the tectonic belt before that of the main hydrocarbon generation and expul-sion period of the peripheral hydrocarbon generation depression,which is conducive to the accumulation of oil and gas near the tectonic belt.It was easy for oil and gas to accumulate in the bulge area of Bodong low uplift con-trolled by extensional fault,and for oil and gas to accumulate in the slope area controlled by strike slip fault.关键词
渤海湾盆地/辽东-渤东凸起构造带/地质结构/隆升时间/构造演化Key words
Bohai Bay Basin/Liaodong-Bodong Uplift tectonic belt/geological architecture/uplift time/tecton-ic evolution分类
海洋科学引用本文复制引用
吴斌..渤海湾盆地辽东-渤东凸起构造带地质结构与形成演化[J].海洋地质前沿,2024,40(7):25-35,11.基金项目
国家科技重大专项课题"中国近海富烃凹陷优选与有利勘探方向预测"(2016ZX05024-002) （2016ZX05024-002）
"十四五"国家重大科技项目"近海重点潜在富烃洼陷评价技术"(KJGG2022-0301) （KJGG2022-0301）
