HR: 0800h
AN: OS21A-1518    [Abstracts]
TI: Paleocurrent analysis and physical properties of deep-sea mud cores collected from NW Pacific and Northern Gulf of Mexico
AU: * Suzuki, T
EM: takahiro7211@yahoo.co.jp
AF: Master Program in Science and Technology, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, Tsukuba, Iba 305-8572 Japan
AU: Kawamura, K
EM: kichiro@fgi.or.jp
AF: Fukada Geological Institute, 2-13-12 Honkomagome, Bunkyouku, Tokyo, Japan, Tokyo, Tok 113-0021 Japan
AU: Ogawa, Y
EM: yogawa@arsia.geo.tsukuba.ac.jp
AF: Doctoral Program in Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, Japan, Tsukuba, Iba 305-8572 Japan
AU: Flemings, P B
EM: flemings@geosc.psu.edu
AF: Department of Geosciences Pennsylvania State University, 307 Deike Building University Park PA 16802-2714 USA, PA, 16802-2714 United States
AU: Behrmann, J H
EM: jan.behrmann@geologie.uni-freiburg.de
AF: Albert-Ludwigs-Universit„t Freiburg Geologisches Institut, Albertstrasse 23b 79104 Freiburg Germany, Albertstrasse, 79104 Germany
AU: John, C M
EM: cjohn@es.ucsc.edu
AF: Department of Earth Sciences University of California, Santa Cruz, 1156 High Street Santa Cruz CA 95064 USA, CA, 95064 United States
AU: Hirano, N
EM: nhirano@geo.titech.ac.jp
AF: Earth and Planetary Science, Tokyo Institute of Technology, 2-12-1 Oookayama, Meguroku, Tokyo, Japan, Tokyo, Tok 152-8551 Japan
AU: Abe, N
EM: abenatsu@jamstec.go.jp
AF: Institute for Research on Earth Evolution, Japan-Agency for Marine Earth Science and Technology, 2-15 Natsushimatyou, Yokosukasi, Kanagawa, Japan, Kanagawa, Kan 237-0016 Japan
AB: We collected three m-long piston cores of mud during the Kairei cruise (KR04-08 and KR05-10) of Japan Marine Science and Technology Center in 2004 and 2005 from the NW Pacific between Honshu and Shatsky Rise; aside the Fukahori Knoll and Yukawa Knoll. Another set of mud cores, 234.5 m long, was collected during the JOIDES Resolution cruise (IODP Exp308, site U1322) in 2005 from the Ursa Basin located at the eastern levee of the Mississippi Canyon, northeastern Gulf of Mexico of about 1000 m depth. Our study purpose is to know the flow direction by mud particle arrangement by thin section and scanning electron microscope (SEM) and anisotropy of magnetic susceptibility (AMS) data. The data from the NW Pacific indicate weak preferred orientation from SW to NE, suggesting weak bottom current. This is supported by erosional moat to NE direction around the Fukahori Knoll. In the Gulf of Mexico we can know the flow directions of river plumes, turbidity currents, etc., and we can know whether the flows come from the main entry point in the basin or they are derived from the others of the basin. The other basic features of the core sediments are lithology, sedimentary structures, and porosity, together with paleocurrent analysis.
DE: 1518 Magnetic fabrics and anisotropy
DE: 1525 Paleomagnetism applied to tectonics: regional, global
DE: 4558 Sediment transport (1862)
DE: 4863 Sedimentation (1861)
SC: Ocean Sciences [OS]
MN: Fall Meeting 2005