海洋地质与第四纪地质2026，Vol.46Issue(2)：97-109,13.DOI:10.16562/j.cnki.0256-1492.2025112101
东海陆架盆地瓯江凹陷断裂发育特征及其动力学机制
Fault development characteristics and dynamic mechanism of the Oujiang Sag in the East China Sea Shelf Basin
摘要
Abstract
The Oujiang Sag in the East China Sea shelf basin is an important area of oil and gas exploration,and research on its fault system and formation mechanism is of great significance for understanding regional tectonic evolution and hydrocarbon accumulation.Based on the latest collected 2D multi-channel seismic data in the area,we investigated the fault development and its formation dynamic mechanism using seismic data interpretation and balanced section restoration technology.Results show that the Oujiang Sag has a geological structure characteristic of a half-graben faulted depression in the"east faulting and west overlapping"pattern,and developed mainly two types of faults,namely depression-controlling faults and secondary faults.Depression-controlling faults controlled the development morphology of the sag,while secondary faults dominated the structural style within the sag.Fault development could be divided into early,middle,and late stages,and the activity intensity weakened gradually from the Late Mesozoic to the Cenozoic.Affected by the superposition of multi-stage tectonic processes including the subduction of the Pacific Plate and the collision between the Indian Ocean Plate and the Eurasian Plate,the evolution of the Oujiang Sag has experienced 4 distinct stages,i.e.,rifting,depression,uplift,and stable subsidence,which ultimately shaped the current tectonic framework.This study deepened our understanding of the structural deformation characteristics of the Oujiang Sag,revealed the dynamic controlling factors of fault development,and provided important theoretical support for the exploration of Mesozoic-Cenozoic oil and gas resources in the area.关键词
断裂特征/构造演化/动力学机制/瓯江凹陷/东海陆架盆地Key words
fault characteristics/tectonic evolution/dynamic mechanism/Oujiang Sag/East China Sea shelf basin分类
海洋科学引用本文复制引用
周亚美,梁杰,杨艳秋,庞玉茂,杨传胜,廖晶,宋俊兰..东海陆架盆地瓯江凹陷断裂发育特征及其动力学机制[J].海洋地质与第四纪地质,2026,46(2):97-109,13.基金项目
国家自然科学基金面上基金"基于深反射地震探测研究壳幔作用控制下的盆地时空差异发育——以东海陆架盆地为例"(42576076) （42576076）
崂山实验室自立科技创新项目课题"中国海域重点盆地发育时空差异及其深部过程"(LSKJ202203401) （LSKJ202203401）
中国地质调查局地质调查项目"我国东部海域油气资源调查评价"(DD20240087,DD202403020) （DD20240087,DD202403020）
山东省自然科学基金重大基础研究项目"全球微板块编图计划及东南亚微板块汇聚的深部耦合效应"(ZR2021ZD09) （ZR2021ZD09）
