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| Main Authors: | , , , , , , , , , , , , , , , , , , , |
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| Format: | Dataset Open Access |
| Language: | en |
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PANGAEA
2015
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| Subjects: | |
| Online Access: | https://doi.org/10.1594/PANGAEA.853893 |
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| _version_ | 1867170469158846464 |
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| author | Hensen, Christian Scholz, Florian Nuzzo, Marianne Valadares, Vasco Gràcia, Eulàlia Terrinha, Pedro Liebetrau, Volker Kaul, Norbert Silva, Sonia Martinez-Loriente, Sara Bartolome, Rafael Piñero, Elena Magalhães, Vitor H Schmidt, Mark Weise, Stephan M Cunha, Marina Ribeiro Hilário, Ana Perea, Hector Rovelli, Lorenzo Lackschewitz, Klas Sven |
| author_facet | Hensen, Christian Scholz, Florian Nuzzo, Marianne Valadares, Vasco Gràcia, Eulàlia Terrinha, Pedro Liebetrau, Volker Kaul, Norbert Silva, Sonia Martinez-Loriente, Sara Bartolome, Rafael Piñero, Elena Magalhães, Vitor H Schmidt, Mark Weise, Stephan M Cunha, Marina Ribeiro Hilário, Ana Perea, Hector Rovelli, Lorenzo Lackschewitz, Klas Sven |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | We report on newly discovered mud volcanoes located at about 4500 m water depth 90 km west of the deformation front of the accretionary wedge of the Gulf of Cadiz, and thus outside of their typical geotectonic environment. Seismic data suggest that fluid flow is mediated by a >400-km-long strike-slip fault marking the transcurrent plate boundary between Africa and Eurasia. Geochemical data (Cl, B, Sr, 87Sr/86Sr, Delta18O, DeltaD) reveal that fluids originate in oceanic crust older than 140 Ma. On their rise to the surface, these fluids receive strong geochemical signals from recrystallization of Upper Jurassic carbonates and clay-mineral dehydration in younger terrigeneous units. At present, reports of mud volcanoes in similar deep-sea settings are rare, but given that the large area of transform-type plate boundaries has been barely investigated, such pathways of fluid discharge may provide an important, yet unappreciated link between the deeply buried oceanic crust and the deep ocean. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_853893 |
| institution | PANGAEA |
| language | en |
| publishDate | 2015 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Strike-slip faults mediate the rise of crustal-derived fluids and mud volcanism in the deep sea Hensen, Christian Scholz, Florian Nuzzo, Marianne Valadares, Vasco Gràcia, Eulàlia Terrinha, Pedro Liebetrau, Volker Kaul, Norbert Silva, Sonia Martinez-Loriente, Sara Bartolome, Rafael Piñero, Elena Magalhães, Vitor H Schmidt, Mark Weise, Stephan M Cunha, Marina Ribeiro Hilário, Ana Perea, Hector Rovelli, Lorenzo Lackschewitz, Klas Sven We report on newly discovered mud volcanoes located at about 4500 m water depth 90 km west of the deformation front of the accretionary wedge of the Gulf of Cadiz, and thus outside of their typical geotectonic environment. Seismic data suggest that fluid flow is mediated by a >400-km-long strike-slip fault marking the transcurrent plate boundary between Africa and Eurasia. Geochemical data (Cl, B, Sr, 87Sr/86Sr, Delta18O, DeltaD) reveal that fluids originate in oceanic crust older than 140 Ma. On their rise to the surface, these fluids receive strong geochemical signals from recrystallization of Upper Jurassic carbonates and clay-mineral dehydration in younger terrigeneous units. At present, reports of mud volcanoes in similar deep-sea settings are rare, but given that the large area of transform-type plate boundaries has been barely investigated, such pathways of fluid discharge may provide an important, yet unappreciated link between the deeply buried oceanic crust and the deep ocean. |
| title | Strike-slip faults mediate the rise of crustal-derived fluids and mud volcanism in the deep sea |
| topic | |
| url | https://doi.org/10.1594/PANGAEA.853893 |