10.1594/PANGAEA.730524
Gingele, Franz
Franz
Gingele
Schmieder, Frank
Frank
Schmieder
von Dobeneck, Tilo
Tilo
von Dobeneck
0000-0002-0087-4053
Petschick, Rainer
Rainer
Petschick
Rühlemann, Carsten
Carsten
Rühlemann
Sedimentology of the Rio Grande Rise area
PANGAEA
1999
Gravity corer (Kiel type)
M23/2
M29/2
Meteor (1986)
Geosciences, University of Bremen (GeoB)
1993-03-05T00:00:00/1994-07-30T00:00:00
en
Supplementary Publication Series of Datasets
10.1029/1998PA900012
6 datasets
application/zip
Creative Commons Attribution 3.0 Unported
Surface sediment samples and three gravity cores from the eastern terrace of the Vema Channel, the western flank of the Rio Grande Rise, and the Brazilian continental slope were investigated for physical properties, grain size, and clay mineral composition. Discharge of the Rio Doce is responsible for kaolinite enrichments on the slope south of 20° and at intermediate depths of the Rio Grande Rise. The long-distance advection of kaolinite with North Atlantic Deep Water from lower latitudes is of minor importance as evidenced by low kaolinite/chlorite ratios on the Mid-Atlantic Ridge. Cyclic variations of kaolinite/chlorite ratios in all our cores, with maxima in interglacials, are attributed to low-and high-latitude forcing of paleoclimate on the Brazilian mainland and the related discharge of the Rio Doce. A long-term trend toward more arid and 'glacial' conditions from 1500 ka to present is superimposed on the glacial-interglacial cyclicity.
Supplement to: Gingele, Franz; Schmieder, Frank; von Dobeneck, Tilo; Petschick, Rainer; Rühlemann, Carsten (1999): Terrigenous flux in the Rio Grande Rise area during the last 1.5 Ma: evidence of deepwater advection or rapid response to continental rainfall patterns. Paleoceanography, 14(1), 84-95
-45.51999999999998
-38.80166666666662
-30.4516666666666
-28.648333333333
Argentine Basin
Rio Grande Rise