Pleistocene deep-sea sediment in ODP Hole 1149A, Nadezhda Basin; sources, alteration, and age controls (0-800 ka)

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doi: 10.2973/odp.proc.sr.185.012.2003
Author(s): Urbat, Michael; Pletsch, Thomas
Ocean Drilling Program, Leg 185, Shipboard Scientific Party, College Station, TX
Author Affiliation(s): Primary:
University of Cologne, Department of Geology, Cologne, Federal Republic of Germany
Other:
Boston University, United States
Ocean Drilling Program, United States
University of North Carolina, United States
University of Michigan, United States
University of Southampton, United Kingdom
University of Leicester, United Kingdom
Université de Lausanne, Switzerland
ODP/Naturalia et Biologia, France
Oregon State University, United States
Lamont-Doherty Earth Observatory, United States
Goteborgs Universitet, Sweden
Tokyo Institute of Technology, Japan
Université Louis Pasteur, France
University of Kansas, United States
University of Rhode Island, United States
Consiglio Nazionale delle Ricerche, Italy
Christian-Albrechts-Universität zu Kiel, Federal Republic of Germany
Scripps Institution of Oceanography, United States
University of Wyoming, United States
Washington University, United States
Volume Title: Proceedings of the Ocean Drilling Program; scientific results, Izu-Mariana Margin; covering Leg 185 of the drilling vessel JOIDES Resolution; Hong Kong, People's Republic of China, to Yokohama, Japan; Sites 801 and 1149; 12 April-14 June 1999
Volume Author(s): Ludden, John N., editor; Plank, Terry; Escutia, Carlota; Abrams, Lewis J.; Alt, Jeffrey C.; Armstrong, Robin N.; Barr, Samantha; Bartolini, Annachiara; Cairns, Graeme; Fisk, Martin R.; Guèrin, Gilles; Haveman, Shelley A.; Hirono, Tetsuro; Honnorez, José; Kelley, Katherine A.; Larson, Roger L.; Lozar, Francesca M.; Murray, Richard W.; Pletsch, Thomas K.; Pockalny, Robert A.; Rouxel, Olivier; Schmidt, Angelika; Smith, David C.; Spivack, Arthur J.; Staudigel, Hubert; Steiner, Maureen B.; Valentine, Robert B.
Source: Proceedings of the Ocean Drilling Program; scientific results, Izu-Mariana Margin; covering Leg 185 of the drilling vessel JOIDES Resolution; Hong Kong, People's Republic of China, to Yokohama, Japan; Sites 801 and 1149; 12 April-14 June 1999, John N. Ludden, Terry Plank, Carlota Escutia, Lewis J. Abrams, Jeffrey C. Alt, Robin N. Armstrong, Samantha Barr, Annachiara Bartolini, Graeme Cairns, Martin R. Fisk, Gilles Guèrin, Shelley A. Haveman, Tetsuro Hirono, José Honnorez, Katherine A. Kelley, Roger L. Larson, Francesca M. Lozar, Richard W. Murray, Thomas K. Pletsch, Robert A. Pockalny, Olivier Rouxel, Angelika Schmidt, David C. Smith, Arthur J. Spivack, Hubert Staudigel, Maureen B. Steiner and Robert B. Valentine; Ocean Drilling Program, Leg 185, Shipboard Scientific Party, College Station, TX. Proceedings of the Ocean Drilling Program, Scientific Results (CD ROM), Vol.185, 21p. Publisher: Texas A&M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 1096-2514
Note: In English. Available only on CD-ROM in PDF format and on the Web in PDF or HTML. 18 refs.CD-ROM, ISSN 1096-2514; WWW, ISSN 1096-7451; illus.
Summary: We employed several approaches to refine age estimates for the late Pleistocene sedimentary section recovered from Ocean Drilling Program Hole 1149A, which is located in the abyssal plain of the Nadezhda Basin in the northwest Pacific Ocean. Our study is based on a combination of paleo- and rock magnetic as well as geochemical-mineralogic Xray fluorescence and X-ray diffraction data measured on 300 pairs of samples. These were taken at high resolution (1 sample per 3-5 k.y.) from the uppermost 32 m in Hole 1149A, which covers the Brunhes Chron and extends into the Matuyama Chron. This section provides an expanded record of eolian dust (supplied from the Asian continent), of changing volcanic ash input, and of siliceous plankton accumulation, with recurrent diagenetic intervals in a deep-sea environment. We used normative calculations on the basis of Al and Cr contents to discriminate between the major groups of components (terrigenous, volcanogenic, biogenic, and diagenetic) in combination with our magnetic results. The magnetic signal in Hole 1149A is driven dominantly by the varying inputs of eolian dispersed ash and terrigenous dust. A glacial- interglacial influence on the record is established by a correlation of the CaO record from Hole 1149A to the SPECMAP δ18O composite curve. Despite the generally excellent paleomagnetic properties of the sediment, there is no record of polarity events during the Brunhes Chron to allow construction of further age tie points nor is the record suitable for relative paleointensity stratigraphy. Several intervals are characterized by dramatic changes in rock magnetic parameters and adjacent enrichments in diagenetic minerals. These intervals correspond to paleoredox boundaries, where suboxic conditions promoted the destruction of the primary magnetic signal and the precipitation of rhodochrosite (MnCO3).
Year of Publication: 2006
Research Program: ODP Ocean Drilling Program
Key Words: 24 Surficial Geology, Quaternary Geology; Alteration; Brunhes Chron; Cenozoic; Deep-sea environment; Diagenesis; Geochemistry; Isotope ratios; Isotopes; Leg 185; Lithostratigraphy; Magnetic properties; Magnetostratigraphy; Marine environment; Marine sediments; Matuyama Chron; Mineral composition; Nadezhda Basin; North Pacific; Northwest Pacific; O-18/O-16; ODP Site 1149; Ocean Drilling Program; Oxygen; Pacific Ocean; Paleomagnetism; Pleistocene; Quaternary; Sediments; Stable isotopes; Upper Cenozoic; Upper Quaternary; West Pacific
Coordinates: N312030 N312030 E1432100 E1432100
Record ID: 2006060884
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