Shallow seismic facies characteristics of the modern underwater delta of the Yangtze River

WANG Yuan; YAN Xuexin; WANG Zhihua; ZHAO Baocheng; ZHAN Qing

doi:10.16562/j.cnki.0256-1492.2017082901

Marine Geology & Quaternary Geology > 2019 > 39(2): 114-122. > DOI: 10.16562/j.cnki.0256-1492.2017082901

WANG Yuan, YAN Xuexin, WANG Zhihua, ZHAO Baocheng, ZHAN Qing. Shallow seismic facies characteristics of the modern underwater delta of the Yangtze River[J]. Marine Geology & Quaternary Geology, 2019, 39(2): 114-122. DOI: 10.16562/j.cnki.0256-1492.2017082901

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Shallow seismic facies characteristics of the modern underwater delta of the Yangtze River

Shanghai Institute of Geological Survey, Shanghai 200072, China

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Received Date: August 28, 2017
Revised Date: May 29, 2018

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Abstract

Abstract

According to the traditional method for seismic facies analysis, geometrical shapes, internal reflection structures, facies boundaries, continuity and amplitude of the shallow strata of the Yangtze River are studied by this paper, upon which seismic facies recognized. Incorporated with borehole data we established the facies framework which includes deltaic deposit, shallow sea deposit and paleo channels of the river. Typical seismic facies of delta front are mainly distributed in the northeastern part of the Yangtze River mouth, and the rest of the area is dominated by shallow marine facies. Shallow marine facies consisting of sand and silt are gradually thinning out towards the mouth. Instead, late Pleistocene basement seismic facies gradually crop out at the mouth, decorated by paleochannel seismic facies. Shallow gas seismic facies always invade into other seismic facies.
- shallow seismic survey,
- reflection structure,
- seismic facies,
- delta deposit,
- depositional setting

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References (22)

References

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Shallow seismic facies characteristics of the modern underwater delta of the Yangtze River