TY - JOUR
T1 - Paleoceanography of the northwestern Pacific during the Albian
AU - Yamamura, Mitsuru
AU - Kawahata, Hodaka
AU - Matsumoto, Katsumi
AU - Takashima, Reishi
AU - Nishi, Hiroshi
PY - 2007/10/22
Y1 - 2007/10/22
N2 - The deep ocean conditions and circulation during the Cretaceous have been characterized mainly by the sediments from the Tethys Sea and the proto-Atlantic Ocean, because sedimentological data from the Pacific basin from that period have been quite limited. Here we present new geochemical measurements from sediments that we collected from two sites in Hokkaido, Japan, that were presumably deposited in the northwest Pacific during the Albian (∼ 112 Ma). The low organic carbon and carbonate contents, combined with other measurements, from our study suggest that the mid-depth northwest Pacific during the time of deposition was corrosive to sedimentary carbonate but oxic. We also use a simple box model of the ocean biogeochemistry to investigate the conditions of carbonate preservation and suggest that the northwest Pacific hydrography was quite distinct from the Tethys Sea and the proto-Atlantic Ocean.
AB - The deep ocean conditions and circulation during the Cretaceous have been characterized mainly by the sediments from the Tethys Sea and the proto-Atlantic Ocean, because sedimentological data from the Pacific basin from that period have been quite limited. Here we present new geochemical measurements from sediments that we collected from two sites in Hokkaido, Japan, that were presumably deposited in the northwest Pacific during the Albian (∼ 112 Ma). The low organic carbon and carbonate contents, combined with other measurements, from our study suggest that the mid-depth northwest Pacific during the time of deposition was corrosive to sedimentary carbonate but oxic. We also use a simple box model of the ocean biogeochemistry to investigate the conditions of carbonate preservation and suggest that the northwest Pacific hydrography was quite distinct from the Tethys Sea and the proto-Atlantic Ocean.
KW - Albian
KW - Box modeling
KW - Circulation
KW - Geochemistry
KW - Northwestern Pacific
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U2 - 10.1016/j.palaeo.2007.07.002
DO - 10.1016/j.palaeo.2007.07.002
M3 - Article
AN - SCOPUS:34548863111
VL - 254
SP - 477
EP - 491
JO - Palaeogeography, Palaeoclimatology, Palaeoecology
JF - Palaeogeography, Palaeoclimatology, Palaeoecology
SN - 0031-0182
IS - 3-4
ER -