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Tectonics and mud volcano development in the Gulf of Cádiz

Medialdea Cela, Teresa and Somoza Losada, Luis and Pinheiro, Luis Menezes and Fernández Puga, Mª Carmen and Vázquez Garrido, Juan Tomás and León Buendía, Ricardo and Ivanov, M.K. and Magalhaes, Vitor Hugo and Díaz del Río Español, Víctor and Vegas, Ramón (2009) Tectonics and mud volcano development in the Gulf of Cádiz. Marine geology, 261 . pp. 48-63. ISSN 0025-3227

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Abstract

Many structures associated with fluid escape, including mud volcanoes, mud-carbonate mounds, pockmarks
and slides, have been identified and characterized in the Gulf of Cádiz. Most of the mud volcanoes following
NE–SW and NW–SE main trends are found at 350–2000 m depth in the eastern domain of the Gulf of Cádiz,
which corresponds to the Betic–Rifean Margin. Scattered mud volcanoes have also been recognized on the
lower slope at 2300–3900 m depth. The major tectonic structures are thrust faults, extensional faults, strikeslip
faults and diapirs. All these tectonic structures have provided escape pathways for overpressured
material and fluids or have favoured upward fluid movement along the sedimentary column and eventually
the build up of mud volcanoes. In this work we present images of the mud volcano plumbing systems and the
relationship between regional tectonics and mud volcano development. Seismic profiles acquired during the
TASYO 2000 and MVSEIS/TTR-15 cruises are used to image and interpret the link between the mud volcano
edifices and the subsurface tectonic structures.


Item Type:Article
Uncontrolled Keywords:Mud volcanoes; Hydrocarbon seeps; Fluid venting; Diapirism; Tectonics; Gulf of Cadiz
Subjects:Sciences > Geology > Geodynamics
ID Code:16746
Deposited On:17 Oct 2012 11:57
Last Modified:17 Oct 2012 11:57

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