Shallow and submarine identifications of gas hydrate in the Makran accretionary prism, northern Arabian Sea

ZHANG Zhen; DENG Xiguang; YAO Huiqiang; YU Miao; WANG Haifeng; XIAO Huizhong; CHENG Yuan

doi:10.12097/j.issn.1671-2552.2023.01.003

2023 Vol. 42, No. 1

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ZHANG Zhen, DENG Xiguang, YAO Huiqiang, YU Miao, WANG Haifeng, XIAO Huizhong, CHENG Yuan. 2023. Shallow and submarine identifications of gas hydrate in the Makran accretionary prism, northern Arabian Sea. Geological Bulletin of China, 42(1): 27-40. doi: 10.12097/j.issn.1671-2552.2023.01.003

Citation:

ZHANG Zhen, DENG Xiguang, YAO Huiqiang, YU Miao, WANG Haifeng, XIAO Huizhong, CHENG Yuan. 2023. Shallow and submarine identifications of gas hydrate in the Makran accretionary prism, northern Arabian Sea. Geological Bulletin of China, 42(1): 27-40. doi: 10.12097/j.issn.1671-2552.2023.01.003

Shallow and submarine identifications of gas hydrate in the Makran accretionary prism, northern Arabian Sea

1.
Key Laboratory of Marine Mineral Resources, Ministry of Natural Resources/Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou 510075, Guangdong, China
2.
National Engineering Research Center for Gas Hydrate Exploration and Development, Guangzhou 510075, Guangdong, China

More Information

Corresponding author: DENG Xiguang, dengxg68@163.com

Received Date: 10 November 2020

Revised Date: 20 May 2021

Publish Date: 15 January 2023

Abstract

Abstract

The Makran accretionary prism located in the northern Arabian Sea is formed by the subduction of the Arabian plate beneath the Eurasian plate in a northerly direction at low speed and low angle,and there are abundant gas hydrate resources in the accretionary prism. Based on the high-resolution multi-channel seismic data,sub-bottom profile and multi-beam echo sounding data acquired by China in 2019, combined with the former investigation results,this paper discusses the shallow and submarine identifications of gas hydrate in the Makran accretionary prism. The seismic identifications mainly include bottom simulating reflector(BSR)and acoustic blank zone. The topographic and geomorphic signs include submarine pockmark,submarine slump,mound,mud volcano and cold seeps system. The water body signs mainly is flare. Gas hydrate samples have been drilled at the stations with water depth of 1000 m and 2900 m respectively. The abundant hydrate identifications of Makran accretionary prism may be related to the low velocity and low angle subduction geological background,which makes the hydrate identifications in this area show the characteristics of active continental and passive continental margins. Based on the distribution characteristics of identifications in the study area,the anticlinal ridges and theiradjacent areas in the central and western parts of accretionary prism are the gas hydrates prospective areas.
- Makran accretionary prism /
- gas hydrate /
- seismic identification /
- topographic and geomorphic sign /
- water body sign /

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References

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