Chemical and isotopic composition of interstitial waters and hydrocarbon composition at ODP Site 184-1146
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| Main Authors: | , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2003
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| _version_ | 1867167668281278464 |
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| author | Zhu, Youhai Huang, Yongyang Matsumoto, Ryo Wu, Bihao |
| author_facet | Zhu, Youhai Huang, Yongyang Matsumoto, Ryo Wu, Bihao |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Bottom-simulating reflectors were observed beneath the southeastern slope of the Dongsha Islands in the South China Sea, raising the potential for the presence of gas hydrate in the area. We have analyzed the chemical and isotopic compositions of interstitial water, headspace gas, and authigenic siderite concretions from Site 1146. Geochemical anomalies, including a slight decrease of chlorine concentration in interstitial water, substantial increase of methane concentration in headspace gas, and 18O enrichment in the authigenic siderite concretion below 400 meters below seafloor are probably caused by the decomposition of gas hydrate. The low-chlorine pore fluids contain higher molecular-weight hydrocarbons and probably migrate to Site 1146 along faults or bedded planes. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_784852 |
| institution | PANGAEA |
| language | en |
| publishDate | 2003 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Chemical and isotopic composition of interstitial waters and hydrocarbon composition at ODP Site 184-1146 Zhu, Youhai Huang, Yongyang Matsumoto, Ryo Wu, Bihao 184-1146A; 184-1146C; DRILL; Drilling/drill rig; Joides Resolution; Leg184; Ocean Drilling Program; ODP; South China Sea Bottom-simulating reflectors were observed beneath the southeastern slope of the Dongsha Islands in the South China Sea, raising the potential for the presence of gas hydrate in the area. We have analyzed the chemical and isotopic compositions of interstitial water, headspace gas, and authigenic siderite concretions from Site 1146. Geochemical anomalies, including a slight decrease of chlorine concentration in interstitial water, substantial increase of methane concentration in headspace gas, and 18O enrichment in the authigenic siderite concretion below 400 meters below seafloor are probably caused by the decomposition of gas hydrate. The low-chlorine pore fluids contain higher molecular-weight hydrocarbons and probably migrate to Site 1146 along faults or bedded planes. |
| title | Chemical and isotopic composition of interstitial waters and hydrocarbon composition at ODP Site 184-1146 |
| topic | 184-1146A; 184-1146C; DRILL; Drilling/drill rig; Joides Resolution; Leg184; Ocean Drilling Program; ODP; South China Sea |
| url | https://doi.org/10.1594/PANGAEA.784852 |