地质学报2025，Vol.99Issue(5)：1538-1553,16.DOI:10.19762/j.cnki.dizhixuebao.2023462
珠江口盆地白云凹陷周缘凸起成因差异及意义
The differences and significance in the genesis of the peripheral uplift of the Baiyun sag,Pearl River Mouth basin
摘要
Abstract
The Baiyun sag,located in the Zhu 2 depression of the central Pearl River Mouth basin,has undergone a complex evolution from a Mesozoic active continental margin to a Cenozoic passive continental margin.Recent expansion of oil and gas exploration targets to deeper buried hills necessitates a comprehensive understanding of the structure and genesis of these uplifts.This study employs 3D seismic and borehole data to analyze the structural characteristics of uplifts around the Baiyun sag and investigate their formation processes.Our findings reveal distinct genesis for these uplifts,categorized into three types:the Panyu low uplift,mainly controlled by Mesozoic thrust faults;the Yunkai low uplift,jointly controlled by Meso-Cenozoic faulting;and the Yundong low uplift,mainly governed by Cenozoic extensional faults.This diversity in uplift structures is related to the degree and type of interaction between Meso-Cenozoic faults.Mesozoic pre-existing faults determined the complexity of the basement structure,while subsequent Cenozoic faulting,both inheriting and modifying these pre-existing faults,resulted in the observed variety of uplift structures.Late-stage magmatism and fault modification further enriched this diversity.Furthermore,we investigated reservoir formation conditions in buried hills,identifying weathering,faulting,and magmatism-related fractures as the main reservoir spaces that exhibit regular planar distributions.Therefore,by studying the differences in uplift genesis,we can not only investigate the interactions between pre-existing and late extensional faults but also provide a structural basis for understanding reservoir formation and evaluating exploration targets in buried hills.关键词
白云凹陷/南海北部珠江口盆地/凸起成因/先存断层/潜山Key words
Baiyun sag/Pearl River Mouth basin in the northern South China Sea margin/genesis of uplift/pre-existing fault/buried hill引用本文复制引用
官伟,吴哲,马云杰,刘池洋,彭光荣,黄雷,宋立军,梁超,李鑫,张丽丽,李洪博..珠江口盆地白云凹陷周缘凸起成因差异及意义[J].地质学报,2025,99(5):1538-1553,16.基金项目
本文为国家自然科学基金项目(编号42230815,42272148)资助的成果. （编号42230815,42272148）
