TY - JOUR T1 - Direct observation of intense turbidity current activity in the Zaire submarine valley at 4000 m water depth A1 - Khripounoff,Alexis A1 - Vangriesheim,Annick A1 - Babonneau,Nathalie A1 - Crassous,Philippe A1 - Dennielou,Bernard A1 - Savoye,Bruno AD - IFREMER, Dept Environm Profond, F-29280 Plouzane, France. AD - IFREMER, Dept Geosci Marines, F-29280 Plouzane, France. UR - https://archimer.ifremer.fr/doc/00000/1419/ DO - 10.1016/S0025-3227(02)00677-1 KW - West equatorial Africa KW - Particle composition KW - Particle flux KW - Zaire channel KW - Turbidity current N2 - A large turbidity current was detected in the Zaire submarine valley at 4000 m water depth. Current meters, turbidimeter and sediment trap deployed on a mooring located in the channel axis, although they were damaged, recorded the signature of a very high energy event. An average velocity of more than 121 cm s-1 was measured 150 m above the channel floor. Coarse sand and plant debris were collected at 40 m height. The turbidity current clearly overflowed the edges of the valley as demonstrated by the large quantity of turbiditic material (464 mg organic carbon m-2 d-1) found in the sediment trap moored 13 km south from the channel axis. Y1 - 2003/03 PB - Elsevier JF - Marine Geology SN - 0025-3227 VL - 194 IS - 3-4 SP - 151 EP - 158 ID - 1419 ER -