Volcanic-controlled basin architecture variation and dynamic sediment filling in the South Lufeng Sag, South China Sea

Zhao，Qian1,2,3; Zhu，Hongtao1,2; Bao，Xueyang3; Peng，Guangrong4; Qiu，Xinwei4; Liu，Qianghu1,2; Li，Min4; Xiao，Zhangbo4

2024-09-01

10.1016/j.marpetgeo.2024.106963

Marine and Petroleum Geology   影响因子和分区

0264-8172

Volcanic-controlled changes of basin architectures and sediments have given rise to diverse and rapidly evolving “dynamic geomorphology,” which poses challenges to successful petroleum development. Nonetheless, the accompanying volcanic deposits and landforms often produce rich and distinct seismic responses within conventional sedimentary layers, offering vital support in addressing this critical issue. Based on this, we compared the volcanic activity stages, evolution of geomorphology, and sediment dispersal processes to determine the process of basinal evolution by analyzing the episodes and distribution of volcanic-related deposits, sub-stages, seismic facies, and attributes of deposits of the South Lufeng Sag in the Pearl River Mouth Basin, South China Sea. The widespread development of strong amplitude attributes and chaotic reflection variance cube attribute spatial perspectives reveal the evolution of both intrusive and effusive facies in the lower Wenchang Formation across three stages of volcanic activity. The seismic amplitude difference of the andesite and andesitic tuff unveils the transition of the depositional pathway from north to south in the west depression with change of depocenters, lays the foundation for the dynamic geomorphic evolution of the “transitional basin” in the region. In the middle Huizhou-Lufeng uplift, the chaotic reflection with weak amplitude and obvious diapir structures revealed by andesite constrain the distribution of sedimentary space and the transformation of sedimentary pathways within the basin, and the evolution process of the “restricted basin” is summarised in terms of sedimentary filling processes. The seismic amplitude differences of basalt and andesitic tuff - related sediments in the east depression record the process of transformation from a single sedimentary channel to multi-pathway transport, which is summarised as the evolutionary model of the “diffusive basin”. This study offers a meticulous exploration into the evolutionary trajectory of dynamic geomorphology and sedimentary accumulation in a basin regulated by volcanic activity. The findings pave the way for the extensive application of this methodology in petroleum development across various geographic regions.

Basinal architecture Sedimentary filling progress South Lufeng Sag Volcanic activity

SCI ; EI

英语

通讯

20242616316772

Architecture ; Gasoline ; Geomorphology ; Petroleum deposits ; Petroleum prospecting ; Sedimentology ; Sediments ; Seismology ; Volcanoes

Buildings and Towers:402 ; Geology:481.1 ; Geomorphology:481.1.1 ; Soil Mechanics and Foundations:483 ; Seismology:484 ; Earthquake Measurements and Analysis:484.1 ; Petroleum Deposits:512.1 ; Petroleum Deposits : Development Operations:512.1.2 ; Liquid Fuels:523

GEOSCIENCES

2-s2.0-85196665466

Scopus

1.Key Laboratory of Tectonics and Petroleum Resources,China University of Geoscience,Ministry of Education,Wuhan,430074,China
2.School of Earth Resources,China University of Geosciences,Wuhan,430074,China
3.Department of Earth and Space Sciences,Southern University of Science and Technology,Shenzhen,518055,China
4.Shenzhen Branch of CNOOC Ltd.,Shenzhen,518052,China

Zhao，Qian,Zhu，Hongtao,Bao，Xueyang,et al. Volcanic-controlled basin architecture variation and dynamic sediment filling in the South Lufeng Sag, South China Sea[J]. Marine and Petroleum Geology,2024,167.

Zhao，Qian.,Zhu，Hongtao.,Bao，Xueyang.,Peng，Guangrong.,Qiu，Xinwei.,...&Xiao，Zhangbo.(2024).Volcanic-controlled basin architecture variation and dynamic sediment filling in the South Lufeng Sag, South China Sea.Marine and Petroleum Geology,167.

Zhao，Qian,et al."Volcanic-controlled basin architecture variation and dynamic sediment filling in the South Lufeng Sag, South China Sea".Marine and Petroleum Geology 167(2024).