Sedimentary responses of tectonic events in Miocene, western margin of South China Sea: a case study of Wan'an Basin

ZHANG Daojun; HE Yunlong; LU Biyu; WANG Yahui; LIU Juan; YANG Yunliu; XIAO Hongyi

doi:10.11781/sysydz202104638

Volume 43 Issue 4

Jul. 2021

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Article Navigation > PETROLEUM GEOLOGY & EXPERIMENT > 2021 > 43(4): 638-647

ZHANG Daojun, HE Yunlong, LU Biyu, WANG Yahui, LIU Juan, YANG Yunliu, XIAO Hongyi. Sedimentary responses of tectonic events in Miocene, western margin of South China Sea: a case study of Wan'an Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2021, 43(4): 638-647. doi: 10.11781/sysydz202104638

Citation:

ZHANG Daojun, HE Yunlong, LU Biyu, WANG Yahui, LIU Juan, YANG Yunliu, XIAO Hongyi. Sedimentary responses of tectonic events in Miocene, western margin of South China Sea: a case study of Wan'an Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2021, 43(4): 638-647. doi: 10.11781/sysydz202104638

Citation:

ZHANG Daojun, HE Yunlong, LU Biyu, WANG Yahui, LIU Juan, YANG Yunliu, XIAO Hongyi. Sedimentary responses of tectonic events in Miocene, western margin of South China Sea: a case study of Wan'an Basin[J]. PETROLEUM GEOLOGY & EXPERIMENT, 2021, 43(4): 638-647. doi: 10.11781/sysydz202104638

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Sedimentary responses of tectonic events in Miocene, western margin of South China Sea: a case study of Wan'an Basin

doi: 10.11781/sysydz202104638

1.
Zhanjiang Branch, CNOOC Limited, Zhanjiang, Guangdong 524057, China
2.
Hubei Key Laboratory of Marine Geological Resources, China University of Geosciences, Wuhan, Hubei 430074, China
3.
Key Laboratory of Tectonics and Petroleum Resources of Ministry of Education, China University of Geosciences, Wuhan, Hubei 430074, China

Received Date: 2020-07-20
Rev Recd Date: 2021-05-18
Publish Date: 2021-07-28

Abstract

Abstract

The Wan'an Basin is located on the southwestern margin of the South China Sea, and its unique tectonic position has made its filling evolution an important window to study the expansion of the southwest submarine basin and the strike-slip faults on the western margin. Based on the results of core analysis, correlation of core and seismic reflections, and seismic facies, the characteristics of the infilling of the Wan'an Basin and the sedimentary responses to tectonic events in Miocene were studied. Four main sedimentary facies related to hydrocarbon reservoirs have been developed in the basin during Miocene, including delta, turbidite fan, carbonate platform and reef. In the Early Miocene, delta facies was widespread in the study area. During the Middle Miocene, delta facies developed only in the western part of the Wan'an Basin, and carbonate platform deposits began to develop in the eastern part. And turbidite fan, sourced from the western part, began to develop in the Late Miocene. The southwestern sub-basin of the South China Sea stopped expanding at the end of the Early Miocene and the strike-slip fault activities on the western margin of the South China Sea at the end of the Middle Miocene formed two important tectonic unconformity interfaces, which played an important role in constraining the Miocene sedimentary filling in the Wan'an Basin.
- sedimentary evolution,
- tectonic events,
- Miocene,
- Wan'an Basin,
- western margin of South China Sea

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Sedimentary responses of tectonic events in Miocene, western margin of South China Sea: a case study of Wan'an Basin

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Sedimentary responses of tectonic events in Miocene, western margin of South China Sea: a case study of Wan'an Basin

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