Book ; Online: Methane concentrations in sediments of ODP sites 186-1150 and 186-1151, supplementary data to: Ijiri, Akira; Tsunogai, Urumu; Gamo, Toshitaka; Nakagawa, Fumiko; Sakamoto, Tatsuhiko; Saito, Saneatsu (2009): Enrichment of adsorbed methane in authigenic carbonate concretions of the Japan Trench. Geo-Marine Letters, 29(5), 301-308
2009
Abstract: Substantial amounts of adsorbed methane were detected in authigenic carbonate concretions recovered from sedimentary layers from depths between 245 and 1,108 m below seafloor during Ocean Drilling Program Leg 186 to ODP sites 1150 and 1151 on the deep- ... ...
Abstract | Substantial amounts of adsorbed methane were detected in authigenic carbonate concretions recovered from sedimentary layers from depths between 245 and 1,108 m below seafloor during Ocean Drilling Program Leg 186 to ODP sites 1150 and 1151 on the deep-sea terrace of the Japan Trench. Methane contents were almost two orders of magnitude higher in the concretions (291-4,528 nmol/g wet wt) than in the surrounding bulk sediments (5-93 nmol/g wet wt), whereas methane/ethane ratios and stable carbon isotopic compositions were very similar. Carbonate content of surrounding bulk sediments (0.02-3.2 wet wt%) and methane content of the surrounding bulk sediments correlated positively. Extrapolation of the carbonate contents of bulk sediments suggests that 100 wt% carbonate would correspond to 1,886?732 nmol methane per g bulk sediment, which is similar to the average value observed in the carbonate concretions (1,321?1,067 nmol/g wet wt, n = 13). These data support the hypothesis that, in sediments, adsorbed hydrocarbon gases are strongly associated with authigenic carbonates. |
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Language | English |
Dates of publication | 2009-9999 |
Size | Online-Ressource |
Publisher | PANGAEA - Data Publisher for Earth & Environmental Science |
Publishing place | Bremen/Bremerhaven |
Document type | Book ; Online |
Note | This dataset is supplement to doi:10.1007/s00367-009-0143-9 |
DOI | 10.1594/PANGAEA.772945 |
Database | Library catalogue of the German National Library of Science and Technology (TIB), Hannover |
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