FN Archimer Export Format PT J TI Campagne Nodco 2: Reconnaissance de plusieurs sites d'encroutements cobaltiferes dans les Tuamoto u(Polynesie francaise) OT (Nodco 2 Cruise: Potential area for the occurrence of cobalt rich ferromanganese crusts in the Tuamotou Archipelago (French Polynesia).) BT AF LE SUAVE, R AS 1:; FF 1:; IF 0.662 TC 0 UR https://archimer.ifremer.fr/doc/00268/37952/36033.pdf LA French DT Article CR NODCO 2 BO Jean Charcot AB The Taumotou Archipelago, is considered as a potential area for the occurrence of cobalt rich ferromanganese crusts. A detailed seismic and seabeam survey carried out on the northern extension of the plateau has identified topographic highs along 2 main structural directions N 80E and N 150E. In this area, two sites have been surveyed with seabeam, 3.5 kc, and SAR side looking sonar; in addition, dredging and bottom photographs survey have been performed. For all the polymetallic crusts sampled dredged between 1,600 and 600 m, we confirm the enrichment in cobalt as a depth function; the increase in cobalt content is maximum at the outer part of the samples. PY 1990 SO Oceanologica Acta, Special issue SN 0399-1784 PU Gauthier-Villars ID 37952 ER EF