Pliocene to Recent mud diapirism and related mud volcanoes in the Alboran Sea (western Mediterranean)

Author(s): Talukder, A. R.; Comas, M. C.; Soto, J. L.
Author Affiliation(s): Primary:
Universidad de Granada, Instituto Andaluz de Ciencias de la Tierra, Granada, Spain
Other:
University of Adelaide, Australia
Aberswyth University of Wales, United Kingdom
University of Brunei Darussalam, Brunei
Volume Title: Subsurface sediment mobilization
Volume Author(s): van Rensbergen, Pieter, editor; Hillis, Richard R.; Maltman, Alex J.; Morley, Christopher K.
Source: Geological Society Special Publications, Vol.216, p.443-459; Subsurface sediment mobilization, Ghent, Belgium, Sept. 2001, edited by Pieter van Rensbergen, Richard R. Hillis, Alex J. Maltman and Christopher K. Morley. Publisher: Geological Society of London, London, United Kingdom. ISSN: 0305-8719. ISBN: 1-86239-141-6 CODEN: GSLSBW
Note: In English. 68 refs.; illus., incl. sects., geol. sketch map
Summary: High resolution and multichannel seismic profiles depict the Pliocene to Recent evolution of the mud diapirism in the West Alboran Basin (WAB) and its relationship with the Miocene diapir province that occupies the WAB depocentre. During the early to middle Miocene period of basin extension (16 to 9 Ma), normal faulting triggered the diapirism from mobile overpressured shale containing olistostromes. Plio-Quaternary diapirism evolved as a second main stage of diapiric activity and developed throughout the subsequent contractive tectonic evolution of the basin (9 Ma to Holocene). Mud volcanoes, discovered to the south of the WAB, developed on the flank of Recent diapirs as a consequence of the rise of fluidized sediments through diapiric bodies and/or through fractures connecting with deeper diapirs. During the Pliocene to Recent, some diapirs stopped ascending, leading to the production of collapse structures on their tops due to lateral subsurface mud migration and/or fluid escape. Other cylindrical shaped diapirs continued rising and produced mud volcanoes on the sea floor. All the studied volcanoes seem to be currently inactive. Two major pulses of diapiric rise have been distinguished during the Pliocene to Recent contractive evolution of the basin.
Year of Publication: 2003
Research Program: ODP Ocean Drilling Program
Key Words: 06 Petrology, Sedimentary; 20 Geophysics, Applied; Acoustical methods; Alboran Sea; Basins; Bottom features; Cenozoic; Clastic sediments; Depositional environment; Diapirs; Emplacement; Genesis; Geophysical methods; Geophysical profiles; Geophysical surveys; High-resolution methods; Intrusions; Leg 161; Marine environment; Marine sediments; Mechanism; Mediterranean Sea; Mud volcanoes; Neogene; ODP Site 976; Ocean Drilling Program; Ocean floors; Pliocene; Quaternary; Reflection methods; Sedimentary basins; Sedimentary structures; Sediments; Seismic methods; Seismic profiles; Seismic stratigraphy; Sequence stratigraphy; Shelf environment; Side-scanning methods; Soft sediment deformation; Sonar methods; Stratigraphic units; Surveys; Tectonostratigraphic units; Tertiary; Unconformities; West Mediterranean
Coordinates: N350000 N370000 W0033000 W0060000
Record ID: 2004078165
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