RT Journal Article
T1 Sea floor morphology and Plio-Quaternary sedimentary cover ofthe Mallorca Channel, Balearic Islands, western Mediterranean
A1 Acosta, Juan
A1 Canals, Miquel
A1 Carbó Gorosabel, Andrés
A1 Muñoz, Araceli
A1 Urgeles, R.
A1 Muñoz Martín, Alfonso
A1 Uchupi, E.
AB A complete multibeam coverage of the sea floor of Mallorca Channel, in the western Mediterranean, was recorded duringthe Spanish Exclusive Economic Zone surveys in 1995, 1996 and 1997. These data, combined with previous high-resolutionseismic reflection profiles, allow an assessment of the geomorphology of the area. The channel seafloor is disrupted by a faultcomplex and pockmarks. Motion along the faults split the sea floor into a series of undulations separated by narrow V-shapednotches. Faulting may be a consequence of recent seaward gravitational sliding that occurred along a soft surface at the top of alate Messinian–early Pliocene unit and a late Messinian evaporite. These units have been tilted during recent subsidence of theMallorca Channel at the same time that the insular shelf was uplifted along a fault at the shelf’s edge. The set of pockmarks inthe channel sequence were probably formed by the expulsion of gas of hydrothermal origin, and expulsion may have beenenhanced by the faulting. This gas seepage could be an additional factor leading to sediment instability.
SN 0025-3227
YR 2004
FD 2004
LK https://hdl.handle.net/20.500.14352/52409
UL https://hdl.handle.net/20.500.14352/52409
LA eng
DS Docta Complutense
RD 29 abr 2024