Porosity, permeability, trace elements, and carbon-oxygen isotopes at DSDP Hole 77-536
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| Auteurs principaux: | , , |
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
1984
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| _version_ | 1867167669849948160 |
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| author | Halley, Roberet B Pierson, B J Schlager, Wolfgang |
| author_facet | Halley, Roberet B Pierson, B J Schlager, Wolfgang |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | Talus deposits recovered from Site 536 show evidence of aragonite dissolution, secondary porosity development, and calcite cementation. Although freshwater diagenesis could account for the petrographic features of the altered talus deposits, it does not uniquely account for isotopic or trace-element characteristics. Also, the hydrologic setting required for freshwater alteration is not easily demonstrated for the Campeche Bank. A mixing-zone model does not account for the available trace-element data, but does require somewhat less drastic assumptions about the size of the freshwater lens. Although a seawater (bottom-water) alteration model requires no hydrologic difficulties, unusual circumstances are required to account for the geochemical characteristics of the talus deposits using this model. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_809141 |
| institution | PANGAEA |
| language | en |
| publishDate | 1984 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Porosity, permeability, trace elements, and carbon-oxygen isotopes at DSDP Hole 77-536 Halley, Roberet B Pierson, B J Schlager, Wolfgang 77-536; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Gulf of Mexico/SLOPE; Leg77 Talus deposits recovered from Site 536 show evidence of aragonite dissolution, secondary porosity development, and calcite cementation. Although freshwater diagenesis could account for the petrographic features of the altered talus deposits, it does not uniquely account for isotopic or trace-element characteristics. Also, the hydrologic setting required for freshwater alteration is not easily demonstrated for the Campeche Bank. A mixing-zone model does not account for the available trace-element data, but does require somewhat less drastic assumptions about the size of the freshwater lens. Although a seawater (bottom-water) alteration model requires no hydrologic difficulties, unusual circumstances are required to account for the geochemical characteristics of the talus deposits using this model. |
| title | Porosity, permeability, trace elements, and carbon-oxygen isotopes at DSDP Hole 77-536 |
| topic | 77-536; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Gulf of Mexico/SLOPE; Leg77 |
| url | https://doi.org/10.1594/PANGAEA.809141 |