Distribution and geological control of mud volcanoes and other fluid/free gas seepage features in the Mediterranean Sea and nearby Gulf of Cadiz
Autor: | Laurent Camera, Silvia Ceramicola, Jean Mascle, Daniel Praeg, Flore Mary, Stéphanie Dupré, Laetitia Brosolo |
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Přispěvatelé: | Géoazur (GEOAZUR 7329), Université Côte d'Azur (UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud])-Centre National de la Recherche Scientifique (CNRS)-Observatoire de la Côte d'Azur, Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), Istituto Nazionale di Geofisica e di Oceanografia Sperimentale (OGS), Division technique INSU/SDU (DTI), Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur, COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD [France-Sud]) |
Jazyk: | angličtina |
Rok vydání: | 2014 |
Předmět: |
Accretionary wedge
Pockmark [SDU.STU]Sciences of the Universe [physics]/Earth Sciences Environmental Science (miscellaneous) Geotechnical Engineering and Engineering Geology Oceanography Seafloor spreading Paleontology Tectonics Mediterranean sea Continental margin 13. Climate action Passive margin Earth and Planetary Sciences (miscellaneous) 14. Life underwater Geomorphology Geology Mud volcano |
Zdroj: | Geo-Marine Letters Geo-Marine Letters, Springer Verlag, 2014, 34 (2-3), pp.89-110. ⟨10.1007/s00367-014-0356-4⟩ Geo-Marine Letters, 2014, 34 (2-3), pp.89-110. ⟨10.1007/s00367-014-0356-4⟩ Geo-marine Letters (0276-0460) (Springer), 2014-06, Vol. 34, N. 2-3, P. 89-110 |
ISSN: | 0276-0460 1432-1157 |
DOI: | 10.1007/s00367-014-0356-4⟩ |
Popis: | International audience; Existing knowledge on the distribution of mud volcanoes (MVs) and other significant fluid/free gas-venting features (mud cones, mud pies, mud-brine pools, mud carbonate cones, gas chimneys and, in some cases, pockmark fields) discovered on the seafloor of the Mediterranean Sea and in the nearby Gulf of Cadiz has been compiled using regional geophysical information (including multibeam coverage of most deepwater areas). The resulting dataset comprises both features proven from geological sampling, or in situ observations, and many previously unrecognized MVs inferred from geophysical evidence. The synthesis reveals that MVs clearly have non-random distributions that correspond to two main geodynamic settings: (1) the vast majority occur along the various tectono-sedimentary accretionary wedges of the Africa-Eurasia subduction zone, particularly in the central and eastern Mediterranean basins (external Calabrian Arc, Mediterranean Ridge, Florence Rise) but also along its westernmost boundary in the Gulf of Cadiz; (2) other MVs characterize thick depocentres along parts of the Mesozoic passive continental margins that border Africa from eastern Tunisia to the Levantine coasts, particularly off Egypt and, locally, within some areas of the western Mediterranean back-arc basins. Meaningfully accounting for MV distribution necessitates evidence of overpressured fluids and mud-rich layers. In addition, cross-correlations between MVs and other GIS-based data, such as maps of the Messinian evaporite basins and/or active (or recently active) tectonic trends, stress the importance of assessing geological control in terms of the presence, or not, of thick seals and potential conduits. It is contended that new MV discoveries may be expected in the study region, particularly along the southern Ionian Sea continental margins. |
Databáze: | OpenAIRE |
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