OceanRep
Strike-slip faults mediate the rise of crustal-derived fluids and mud volcanism in the deep sea.
Hensen, Christian , Scholz, Florian, Nuzzo, Marianne, Valadares, V., Gracia, E., Terrinha, P., Liebetrau, Volker, Kaul, N., Silva, S., Martinez-Loriente, S., Bartolome, R., Pinero, Elena, Magalhaes, V. H., Schmidt, Mark
, Weise, S. M., Cunha, M., Hilario, A., Perea, H., Rovelli, L. and Lackschewitz, Klas
(2015)
Strike-slip faults mediate the rise of crustal-derived fluids and mud volcanism in the deep sea.
Geology, 43
(4).
pp. 339-342.
DOI 10.1130/G36359.1.
Preview |
Text
Geology-2015-Hensen.pdf - Published Version Available under License Creative Commons: Attribution 3.0. Download (2MB) | Preview |
Abstract
We report on newly discovered mud volcanoes located at ∼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, δ18O, δD) 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.
Document Type: | Article |
---|---|
Additional Information: | WOS:000352097900022 |
Keywords: | AUV Abyss; RV METEOR; M86/5; IBERIAN MARGIN; CADIZ; GULF; RIDGE; CHEMISTRY; DIAPIRISM; EVOLUTION; ISOTOPE; AFRICA; WATERS |
Research affiliation: | HGF-UFZ OceanRep > GEOMAR > FB2 Marine Biogeochemistry > FB2-MG Marine Geosystems OceanRep > GEOMAR > FB4 Dynamics of the Ocean Floor > FB4-MUHS |
Refereed: | Yes |
Open Access Journal?: | No |
Publisher: | GSA (Geological Society of America) |
Related URLs: | |
Projects: | TRANSFLUX, SHAKE, SWIMGLO, MODELINK, FLOWS |
Expeditions/Models/Experiments: | |
Date Deposited: | 30 Mar 2015 08:04 |
Last Modified: | 24 Oct 2019 11:09 |
URI: | https://oceanrep.geomar.de/id/eprint/28379 |
Actions (login required)
![]() |
View Item |

Copyright 2023 | GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel | All rights reserved
Questions, comments and suggestions regarding the GEOMAR repository are welcomed
at bibliotheksleitung@geomar.de !