![](/images/graphics-bg.png)
Gas Hydrate System of Shenhu Area, Northern South China Sea : Geochemical Results
Joint Authors
Yang, Shengxiong
Zhu, Youhai
Holland, Melanie
Schultheiss, Peter
Su, Xin
Lu, Jin'an
Zhang, Guangxue
Liang, Jinqiang
Zhang, Haiqi
Wu, Nengyou
Source
Journal of Geological Research
Issue
Vol. 2011, Issue 2011 (31 Dec. 2011), pp.1-10, 10 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2011-10-01
Country of Publication
Egypt
No. of Pages
10
Main Subjects
Earth Science , Water and Environment
Abstract EN
The drilling recovered high-concentration methane hydrates (maximum 26–48%) in a disseminated form in silty clay sediments in Shenhu area of Pearl River Mouth Basin, South China Sea.
Combining the geochemical data, the gas hydrate-bearing sediments are 10 m to 43 m in thickness and located just above the base of the gas hydrate stability zone.
The methane content is 96.10–99.91% with small amount of ethane and propane.
The baseline chlorinity of pore waters shows 10% lower than that of shallow sediments below and inside the gas hydrate zone.
The methane/ethane ratios are higher than 1000 above the gas hydrate zone and less than 1000 at the interval of gas hydrate zone.
The depth of sulphate methane interface varies from site to site as 17 to 27 mbsf.
These results show that the methane of gas hydrate was mainly originated from microbial activity and the upward methane flux is minor.
This is evidenced by the δC13CH4 values of headspace gases from the gravity piston cores and released gases from pressure cores, which range from −74.3‰ PDB to −46.2‰ PDB, with the majority less than −55%‰ PDB.
The hydrate deposit is a distributed gas hydrate system in Shenhu area.
American Psychological Association (APA)
Wu, Nengyou& Zhang, Haiqi& Yang, Shengxiong& Zhang, Guangxue& Liang, Jinqiang& Lu, Jin'an…[et al.]. 2011. Gas Hydrate System of Shenhu Area, Northern South China Sea : Geochemical Results. Journal of Geological Research،Vol. 2011, no. 2011, pp.1-10.
https://search.emarefa.net/detail/BIM-466640
Modern Language Association (MLA)
Wu, Nengyou…[et al.]. Gas Hydrate System of Shenhu Area, Northern South China Sea : Geochemical Results. Journal of Geological Research No. 2011 (2011), pp.1-10.
https://search.emarefa.net/detail/BIM-466640
American Medical Association (AMA)
Wu, Nengyou& Zhang, Haiqi& Yang, Shengxiong& Zhang, Guangxue& Liang, Jinqiang& Lu, Jin'an…[et al.]. Gas Hydrate System of Shenhu Area, Northern South China Sea : Geochemical Results. Journal of Geological Research. 2011. Vol. 2011, no. 2011, pp.1-10.
https://search.emarefa.net/detail/BIM-466640
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-466640