FN Archimer Export Format PT J TI Deep-water mass source and dynamic associated with rapid climatic variations during the last glacial stage in the North Atlantic: A multiproxy investigation of the detrital fraction of deep-sea sediments BT AF BALLINI, M KISSEL, C COLIN, C RICHTER, T AS 1:1;2:1;3:2;4:3; FF 1:;2:;3:;4:; C1 Lab Sci Climat & Environm, Unite Mixte CEA CNRS, F-91198 Gif Sur Yvette, France. Univ Paris 11, Lab Interact & Dynam Environm Surface, F-91405 Orsay, France. Royal Netherlands Inst Sea Res, NL-1790 AB Den Burg, Netherlands. C2 LSCE, FRANCE UNIV PARIS 11, FRANCE INST SEA RESEARCH (NIOZ), NETHERLANDS IF 2.384 TC 30 UR https://archimer.ifremer.fr/doc/00235/34585/33077.pdf LA English DT Article CR IMAGES 1-MD101 IMAGES V LEG 1-MD114 IMAGES V LEG 4-MD114 BO Marion Dufresne DE ;glacial period;Dansgaard-Oeschger cycles;North Atlantic;bottom water circulation;magnetic properties;clay minerals AB [1] In order to investigate North Atlantic Deep Water (NADW) dynamics and variability during the last glacial stage, a very high resolution multiproxy analysis of the detrital fraction of sediments deposited during Heinrich event 4 and Dansgaard-Oeschger cycles 8 and 7 has been conducted on three deep-sea cores. These cores are distributed along the path of the North Atlantic Deep Water from the Faeroe Shetland Channel to the Reykjanes ridge and the Irminger basin. The concentration in fine-grained magnetites, the Ti-content, and the smectite percentage within the clay minerals show similar and coeval fluctuations at each site and are comparable from one site to the other. This is the imprint of the detrital fraction originating from the northern basaltic provinces and transported to the studied sites. The average grain size in the fine fraction indicates a transport by deep-sea currents. Therefore the observed fluctuations illustrate changes in the vigor of the bottom currents associated with the NADW with weak currents during cold periods ( Heinrich 4 and stadials) and reactivation of the bottom circulation during interstadials. PY 2006 PD FEB SO Geochemistry Geophysics Geosystems SN 1525-2027 PU Amer Geophysical Union VL 7 IS 2 / Q02N01 UT 000235993000001 BP 1 EP 16 DI 10.1029/2005GC001070 ID 34585 ER EF