SEISMIC CHARACTERISTICS OF QUATERNARY MASS TRANSPORT DEPOSITS IN QIONGDONGNAN BASIN

WANG Dawei; WU Shiguo; DONG Dongdong; YAO Genshun; CAO Quanbin

doi:10.3724/SP.J.1140.2009.03069

2009 Vol. 29, No. 3

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Article navigation > Marine Geology & Quaternary Geology > 2009 > 29(3): 69-74

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WANG Dawei, WU Shiguo, DONG Dongdong, YAO Genshun, CAO Quanbin. SEISMIC CHARACTERISTICS OF QUATERNARY MASS TRANSPORT DEPOSITS IN QIONGDONGNAN BASIN[J]. Marine Geology & Quaternary Geology, 2009, 29(3): 69-74. doi: 10.3724/SP.J.1140.2009.03069

Citation:

WANG Dawei, WU Shiguo, DONG Dongdong, YAO Genshun, CAO Quanbin. SEISMIC CHARACTERISTICS OF QUATERNARY MASS TRANSPORT DEPOSITS IN QIONGDONGNAN BASIN[J]. Marine Geology & Quaternary Geology, 2009, 29(3): 69-74. doi: 10.3724/SP.J.1140.2009.03069

SEISMIC CHARACTERISTICS OF QUATERNARY MASS TRANSPORT DEPOSITS IN QIONGDONGNAN BASIN

1 Key Lab of Marine Geology & Environment, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China;
2 Hangzhou Institute of Petroleum Geology, CNPC, Hangzhou 310013, China

Received Date: 23 February 2009

Revised Date: 28 April 2009

Abstract

Abstract

Mass transport deposits (MTDs)are widely distributed in Quaternary sedimentary sequences of the continental slope in the Qiongdongnan basin, South China Sea. MTDs are a sediment transport mechanism often occurring in the outer-shelf/upper-slope area. MTDs include slide, slump and debris flow. Based on the high resolution deepwater three-dimension seismic data, seismic amplitude and coherence data are obtained. Through the seismic profile, structural map and time slice of target strata, profile characteristics and internal structure of MTDs are revealed. MTDs are characteristic of seismic reflection of mound, hummocky, chaotic, low amplitude and poor continuity. Folds and thrust faults which are attributed to plastic deformation structures occur in MTDs, and folds occur in the main part, thrust faults in the toe part. The high sedimentation rate of Quaternary sequence and the location in the earthquake belt are the trigger mechanism of MTDs in the study area.
- deepwater basin /
- outer-shelf/upper-slope /
- mass transport deposits /
- Qiongdongnan basin

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References

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