High resolution optically stimulated luminescence dating of a sediment core from the southwestern Sea of Okhotsk

Publication: Research - peer-reviewJournal article – Annual report year: 2012

  • Author: Sugisaki, S.

    Grad Univ Adv Studies, Natl Inst Polar Res, Dept Polar Sci, Sch Multidisciplinary Sci, Japan

  • Author: Buylaert, J. P.

    Radiation Physics, Center for Nuclear Technologies, Technical University of Denmark, Frederiksborgvej 399, 4000, Roskilde, Denmark

  • Author: Murray, A. S.

    Aarhus University, Denmark

  • Author: Harada, N.

    Japan Agcy Marine Earth Sci & Technol, Res Inst Global Change, Japan

  • Author: Kimoto, K.

    Japan Agcy Marine Earth Sci & Technol, Res Inst Global Change, Japan

  • Author: Okazaki, Y.

    Japan Agcy Marine Earth Sci & Technol, Res Inst Global Change, Japan

  • Author: Sakamoto, T.

    Japan Agcy Marine Earth Sci & Technol, Inst Biogeosci, Japan

  • Author: Iijima, K.

    Japan Agcy Marine Earth Sci & Technol, Explorat Res Promot Grp, Submarine Resources Res Project, Japan

  • Author: Tsukamoto, S.

    Leibniz Inst Appl Geophys Geochronol & Isotope Hy, Germany

  • Author: Miura, H.

    Grad Univ Adv Studies, Natl Inst Polar Res, Dept Polar Sci, Sch Multidisciplinary Sci, Japan

  • Author: Nogi, Y.

    Grad Univ Adv Studies, Natl Inst Polar Res, Dept Polar Sci, Sci Multidisciplinary Sci, Japan

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Optically stimulated luminescence (OSL) dating is now widely accepted as a chronometer for terrestrial sediment. More recently, it has been suggested that OSL may also be useful in the dating of deep-sea marine sediments. In this paper, we test the usefulness of high resolution quartz OSL dating in application to a 19 m marine sediment core (MR0604-PC04A) taken from the southwestern Sea of Okhotsk, immediately to the north of Hokkaido, Japan. Fine-grained quartz (4 to 11 mu m) was chosen as the dosimeter, and a single-aliquot regenerative-dose protocol was used for the determination of equivalent dose (D-e), with stimulation by both infrared and blue light. The suitability of the measurement procedure was confirmed using dose recovery tests. A high resolution record (similar to 2 OSL ages/m) identified clear sedimentation rate changes down the core. The OSL ages are significantly dependent on the water content model chosen; two alternative interpretations are discussed, and the geologically preferred model identified. However, ages resulting from the observed (non-modeled) water content lie closest to the available radiocarbon ages (in the range back to 20 ka). Our OSL ages confirm the known high sedimentation rates in this locality, and for the first time demonstrate clear differences in sedimentation rate before, during and after deglaciation. Although the apparent accuracy of single sample ages is not always consistent with expectations, average ages are accurate, and our data show that OSL dating can be a powerful method for establishing high resolution marine chronologies.
Original languageEnglish
JournalG3: Geochemistry, Geophysics, Geosystems
Publication date2012
Volume13
PagesQ0AA22
Number of pages20
ISSN1525-2027
DOIs
StatePublished
CitationsWeb of Science® Times Cited: 2

Keywords

  • GEOCHEMISTRY, RADIOCARBON AGE CALIBRATION, REGENERATIVE-DOSE PROTOCOL, ICE-RAFTED DEBRIS, SINGLE-ALIQUOT, NORTH PACIFIC, THERMO-LUMINESCENCE, DELTA-O-18 RECORDS, QUARTZ SAMPLES, DIATOM RECORDS, CHINESE LOESS
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