- Library Home /
- Search Collections /
- Open Collections /
- Browse Collections /
- International Conference on Gas Hydrates (ICGH) (6th : 2008) /
- METHANE BUDGET OF A LARGE GAS HYDRATE PROVINCE OFFSHORE...
Open Collections
International Conference on Gas Hydrates (ICGH) (6th : 2008)
METHANE BUDGET OF A LARGE GAS HYDRATE PROVINCE OFFSHORE GEORGIA, BLACK SEA Haeckel, Matthias; Reitz, Anja; Klaucke, Ingo
Abstract
The Batumi Seep Area, offshore Georgia, Black Sea, has been intensively cored (gravity cores and TV-guided multi-cores) to investigate the methane turnover in the surface sediments. The seep area is characterized by vigorous methane gas bubble emanations. Geochemical analyses show a microbial origin of the methane and a shallow fluid source. Anaerobic methane oxidation rapidly consumes the SO4 2- within the top 5-20 cm, but significant upward fluid advection is not indicated by the porewater profiles. Hence, the Batumi Seep Area must be dominated by methane gas seepage in order to explain the required CH4 flux from below. 1-D transport-reaction modelling constrains the methane flux needed to support the observed SO4 2- flux as well as the rate of near-surface hydrate formation. The model results correlate well with the hydro-acoustic backscatter intensities recorded and mapped bubble release sites using the sonar of a ROV.
Item Metadata
Title |
METHANE BUDGET OF A LARGE GAS HYDRATE PROVINCE OFFSHORE GEORGIA, BLACK SEA
|
Creator | |
Contributor | |
Date Issued |
2008-07
|
Description |
The Batumi Seep Area, offshore Georgia, Black Sea, has been intensively cored (gravity cores
and TV-guided multi-cores) to investigate the methane turnover in the surface sediments. The
seep area is characterized by vigorous methane gas bubble emanations. Geochemical analyses
show a microbial origin of the methane and a shallow fluid source. Anaerobic methane oxidation
rapidly consumes the SO4
2- within the top 5-20 cm, but significant upward fluid advection is not
indicated by the porewater profiles. Hence, the Batumi Seep Area must be dominated by methane
gas seepage in order to explain the required CH4 flux from below. 1-D transport-reaction
modelling constrains the methane flux needed to support the observed SO4
2- flux as well as the
rate of near-surface hydrate formation. The model results correlate well with the hydro-acoustic
backscatter intensities recorded and mapped bubble release sites using the sonar of a ROV.
|
Extent |
124815 bytes
|
Subject | |
Geographic Location | |
Genre | |
Type | |
File Format |
application/pdf
|
Language |
eng
|
Date Available |
2008-09-29
|
Provider |
Vancouver : University of British Columbia Library
|
Rights |
Attribution-NonCommercial-NoDerivatives 4.0 International
|
DOI |
10.14288/1.0041131
|
URI | |
Affiliation | |
Citation |
Haeckel, Matthias; Reitz, Anja; Klaucke, Ingo. 2008. METHANE BUDGET OF A LARGE GAS HYDRATE PROVINCE OFFSHORE GEORGIA, BLACK SEA. Proceedings of the 6th International Conference on Gas Hydrates (ICGH 2008), Vancouver, British Columbia, CANADA, July 6-10, 2008.
|
Peer Review Status |
Unreviewed
|
Copyright Holder |
Haeckel, Matthias
|
Rights URI | |
Aggregated Source Repository |
DSpace
|
Item Media
Item Citations and Data
Rights
Attribution-NonCommercial-NoDerivatives 4.0 International