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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2005
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| Online Access: | https://doi.org/10.1594/PANGAEA.707898 |
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| _version_ | 1867170455105830912 |
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| author | Teichert, Barbara M A Torres, Marta E Bohrmann, Gerhard Eisenhauer, Anton |
| author_facet | Teichert, Barbara M A Torres, Marta E Bohrmann, Gerhard Eisenhauer, Anton |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | ODP Leg 204, which drilled at Hydrate Ridge, provides unique insights into the fluid regime of an accretionary complex and delineates specific sub-seafloor pathways for fluid transport. Compaction and dewatering due to smectite-illite transition increase with distance from the toe of the accretionary prism and bring up fluids from deep within the accretionary complex to sampled depths (<= 600 mbsf). These fluids have a distinctly non-radiogenic strontium isotope signature indicating reaction with the oceanic basement. Boron isotopes are also consistent with a deep fluid source that has been modified by desorption of heavy boron as clay minerals change from smectite to illite. One of three major horizons serves as conduit for the transport of mainly fluid. Our results enable us to evaluate fluid migration pathways that play important roles on massive gas hydrate accumulations and seepage of methane-rich fluids on southern Hydrate Ridge. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_707898 |
| institution | PANGAEA |
| language | en |
| publishDate | 2005 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Strontium and boron geochemistry of ODP sites at Hydrate Ridge, eastern Pacific Ocean Teichert, Barbara M A Torres, Marta E Bohrmann, Gerhard Eisenhauer, Anton 168-1026C; 168-1027C; 204-1244C; 204-1245; 204-1248; 204-1251B; COMPCORE; Composite Core; DRILL; Drilling/drill rig; Joides Resolution; Juan de Fuca Ridge, North Pacific Ocean; Leg168; Leg204; North Pacific Ocean; Ocean Drilling Program; ODP ODP Leg 204, which drilled at Hydrate Ridge, provides unique insights into the fluid regime of an accretionary complex and delineates specific sub-seafloor pathways for fluid transport. Compaction and dewatering due to smectite-illite transition increase with distance from the toe of the accretionary prism and bring up fluids from deep within the accretionary complex to sampled depths (<= 600 mbsf). These fluids have a distinctly non-radiogenic strontium isotope signature indicating reaction with the oceanic basement. Boron isotopes are also consistent with a deep fluid source that has been modified by desorption of heavy boron as clay minerals change from smectite to illite. One of three major horizons serves as conduit for the transport of mainly fluid. Our results enable us to evaluate fluid migration pathways that play important roles on massive gas hydrate accumulations and seepage of methane-rich fluids on southern Hydrate Ridge. |
| title | Strontium and boron geochemistry of ODP sites at Hydrate Ridge, eastern Pacific Ocean |
| topic | 168-1026C; 168-1027C; 204-1244C; 204-1245; 204-1248; 204-1251B; COMPCORE; Composite Core; DRILL; Drilling/drill rig; Joides Resolution; Juan de Fuca Ridge, North Pacific Ocean; Leg168; Leg204; North Pacific Ocean; Ocean Drilling Program; ODP |
| url | https://doi.org/10.1594/PANGAEA.707898 |