Seabed-derived shallow gas features in the southeastern coastal area of Korea

Title
Seabed-derived shallow gas features in the southeastern coastal area of Korea
Author(s)
조진형; 정갑식; 석봉출; 이준호; 이승용; 김성렬
KIOST Author(s)
Cho, Jin Hyung(조진형)Jeong, Kap Sik(정갑식)Jeong, Ji Hye(정지혜)Lee, Seung Yong(이승용)
Publication Year
2008-06-06
Abstract
In the eastern mud-belt of Korea, geophysical and geochemical survey from sedimentary layer and water column were performed to confirm the shallow gas accumulation gas release feature.The active seepage of hydrocarbon gases has been observed by high-resolution (3.5 kHz) seismic profiling both in March and July 2007, occurring through a large number of plumes from the topmost sedimentary layer. The gas seepage appears to be explosive to form craters, although pockmarks are rare. In water column and sediments, the stable carbon isotopes in gases are characterized by large difference between δ13C (-59.8 to -48.6 ‰ PDB) and δ13C (-62.0 to -39.7‰ PDB) values, respectively. The biogenic gases are considered to be generated from high amount of organic carbon (1.5-4.0%) in the sedimentary layer with mixing of small amount of thermogenic gas which derived through faults.
URI
https://sciwatch.kiost.ac.kr/handle/2020.kiost/29902
Bibliographic Citation
Internation Conference on Gas Hydrate 6th, pp.100 - 106, 2008
Publisher
IGCH6
Type
Conference
Language
English
Publisher
IGCH6
Related Researcher
Research Interests

Marine Geology,Marine Geochemistry,Marine Security and Safety Research,해양지질,해양지화학,해양방위

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