Geochemistry of sediment pore water from Well GMGS2-09 in the southeastern Pearl River Mouth Basin, South China Sea: An indication of gas hydrate occurrence

LAI Yijun; YANG Tao; LIANG Jinqiang; ZHANG Guangxue; SU Pibo; FANG Yunxin

doi:10.16562/j.cnki.0256-1492.2018010201

Marine Geology & Quaternary Geology > 2019 > 39(3): 135-142. > DOI: 10.16562/j.cnki.0256-1492.2018010201

LAI Yijun, YANG Tao, LIANG Jinqiang, ZHANG Guangxue, SU Pibo, FANG Yunxin. Geochemistry of sediment pore water from Well GMGS2-09 in the southeastern Pearl River Mouth Basin, South China Sea: An indication of gas hydrate occurrence[J]. Marine Geology & Quaternary Geology, 2019, 39(3): 135-142. DOI: 10.16562/j.cnki.0256-1492.2018010201

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Geochemistry of sediment pore water from Well GMGS2-09 in the southeastern Pearl River Mouth Basin, South China Sea: An indication of gas hydrate occurrence

1.
School of Earth Sciences and Engineering, Nanjing University, Nanjing 210046, China
2.
Collaborative Innovation Center of South China Sea Studies, Nanjing University, Nanjing 210046, China
3.
Guangzhou Marine Geological Survey, Guangzhou 510075, China

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Received Date: January 01, 2018
Revised Date: January 17, 2018

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Abstract

Abstract

Geochemistry of pore water of marine sediments playes an important role in gas hydrate research. In order to detect the gas hydrater-bearing layers, geochemical characteristics and their implications for buried gas hydrates are studied with pore water collected from the Site GMGS2-09 in the southeastern part of the Pearl River Mouth Basin. Cations, anions, hydrogen and oxygen isotopic compositions are analyzed and studied upon previous researches. Chloride anomalies coupled with increased δ¹⁸O in pore water are observed at the depths of 9~17 meter, in which gas hydrate is recovered, 47 meter and 100 meter, which may indicate the presences of gas hydrate-bearing layers. Besides, gas hydrate saturation calculated indicates that it is 50% in depth of 17 m, and about 20% in depth of 47 m and 100 m.
- gas hydrate,
- pore water,
- geochemistry,
- Pearl River Mouth Basin

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References (45)

References

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