HR: 0830h
AN: PP51C-0938    [PDF]
TI: Provenance and Age of Sedimentary Particles Accumulating on the Bermuda Rise
AU: * Eglinton, T I
EM: teglinton@whoi.edu
AF: Marine Chemistry & Geochemistry Dept. Woods Hole Oceanographic Inst., MS#4, 360 Woods Hole Rd., Woods Hole, MA 02543 United States
AU: Ohkouchi, N
EM: nohkouchi@whoi.edu
AF: Marine Chemistry & Geochemistry Dept. Woods Hole Oceanographic Inst., MS#4, 360 Woods Hole Rd., Woods Hole, MA 02543 United States
AU: Hayes, J M
EM: jhayes@whoi.edu
AF: Marine Chemistry & Geochemistry Dept. Woods Hole Oceanographic Inst., MS#4, 360 Woods Hole Rd., Woods Hole, MA 02543 United States
AU: Hayes, J M
EM: jhayes@whoi.edu
AF: Marine Geology & Geophysics Dept. Woods Hole Oceanographic Inst., MS#8, 360 Woods Hole Rd., Woods Hole, MA 02543 United States
AU: Keigwin, L D
EM: lkeigwin@whoi.edu
AF: Marine Geology & Geophysics Dept. Woods Hole Oceanographic Inst., MS#8, 360 Woods Hole Rd., Woods Hole, MA 02543 United States
AB: The Bermuda Rise has been a site of sustained paleoceanographic and sedimentological investigation due to its strategic location and the high sediment accumulation rates that characterize this drift deposit. Recently, we have established that fine-grained sediments which serve as the diluent entrain allochthonous organic matter and influence corresponding molecular proxy signatures. In an attempt to further understand the advective processes that lead to spatial and temporal offsets between molecular and microfossil records at this site, as well as their links to past climate variations, we examined in detail down-core molecular and bulk properties spanning the last glacial maximum to the present. We observe strong correspondence between age offsets and sedimentology, and these in turn are linked to known climate perturbations. Possible causes for these relationships are discussed in terms of sources and modes of delivery of fine-grained sediments to the Bermuda Rise, as well as implications for the application of multi-proxy records.
DE: 1055 Organic geochemistry
DE: 3022 Marine sediments--processes and transport
DE: 4267 Paleoceanography
DE: 4806 Carbon cycling
SC: Paleoceanography and Paleoclimatology [PP]
MN: 2003 Fall Meeting