Paleogene tectonic evolution controls on sequence stratigraphic patterns in the Fushan sag, northern South China Sea

Wang, Guanhong, Wang, Hua, Gan, Huajun, Liu, Entao, Xia, Cunyin, Zhao, Yingdong, Chen, Shanbin and Zhang, Chengcheng (2016) Paleogene tectonic evolution controls on sequence stratigraphic patterns in the Fushan sag, northern South China Sea. Journal of Earth Science, 27 4: 654-669. doi:10.1007/s12583-015-0645-5

Author Wang, Guanhong
Wang, Hua
Gan, Huajun
Liu, Entao
Xia, Cunyin
Zhao, Yingdong
Chen, Shanbin
Zhang, Chengcheng
Title Paleogene tectonic evolution controls on sequence stratigraphic patterns in the Fushan sag, northern South China Sea
Journal name Journal of Earth Science   Check publisher's open access policy
ISSN 1674-487X
Publication date 2016-08-01
Year available 2016
Sub-type Article (original research)
DOI 10.1007/s12583-015-0645-5
Open Access Status Not yet assessed
Volume 27
Issue 4
Start page 654
End page 669
Total pages 16
Place of publication Wuhan, Hubei, China
Publisher China University of Geosciences
Language eng
Subject 1900 Earth and Planetary Sciences
Abstract Tectonism is of extreme importance to sequence stratigraphic patterns in continental sedimentary basins, affecting both the architectures and internal makeup of sequences. Sequence stratigraphic framework of the Paleogene system in the Fushan sag, northern South China Sea, was built using 3D and 2D seismic data, complemented by drilling cores and well logs data. One first-order, three second-order and seven third-order sequences were identified. Analysis of paleotectonic stress field, unconformities and subsidence history showed that the Paleogene tectonic evolution presented significant characteristics of multistage and episode, and can be divided into three stages: rifting stage I (initial rifting period), rifting stage II (rapid subsidence period), rifting stage III (fault-depressed diversionary period). Partition of the west and east in tectonic activity was obvious. The west area showed relatively stronger tectonic activity than the east area, especially during the rifting stage II. Episodic rifting and lateral variations in tectonic activity resulted in a wide variety of structural slope break belts, which controlled both the sequence architectures and interval makeup, and strongly constrained the development of special facies zones or sand bodies that tended to form hydrocarbon accumulation. This paper classifies the genetic types of slope break belts and their relevant sequence stratigraphic patterns within the Fushan sag, and further discusses the tectonic evolution controls on sequence stratigraphic patterns, which suggests that vertical evolution paths of structural slope break belts and relevant sequence stratigraphic patterns as a response to the Paleogene tectonic evolution were strongly controlled by sag margin types and lateral variations of tectonic activity.
Keyword Fushan sag
Sequence stratigraphic pattern
South China Sea
Structural slope break belt
Tectonic evolution
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: School of Earth Sciences Publications
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