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2. High-resolution and high-precision correlation of dark and light layers in the Quaternary hemipelagic sediments of the Japan Sea recovered during IODP Expedition 346

Author

Tada, Ryuji, Irino, Tomohisa, Ikehara, Ken, Karasuda, Akinori, Sugisaki, Saiko, Xuan, Chuang, Sagawa, Takuya, Itaki, Takuya, Kubota, Yoshimi, Lu, Song, Seki, Arisa, Murray, Richard W., Alvarez-Zarikian, Carlos, Anderson, William T., Bassetti, Maria Angela, Brace, Bobbi J., Clemens, Steven C., da Costa Gurgel, Marcio H., Dickens, Gerald R., Dunlea, Ann G., Gallagher, Stephen J., Giosan, Liviu, Henderson, Andrew C.G., Holbourn, Ann E., Kinsley, Christopher W., Lee, Gwang Soo, Lee, Kyung Eun, Lofi, Johanna, Lopes, Christina I.C.D., Saavedra-Pellitero, Mariem, Peterson, Larry C., Singh, Raj K., Toucanne, Samuel, Wan, Shiming, Zheng, Hongbo, Ziegler, Martin, Stratigraphy and paleontology, Stratigraphy & paleontology, Stratigraphy and paleontology, Stratigraphy & paleontology, Department of Earth and Planetary Science [Tokyo], The University of Tokyo (UTokyo), Hokkaido University [Sapporo, Japan], Geological survey of Japan/AIST, Natl Museum Nat & Sci, Dept Geol, Ibaraki, Japan., Caltech Division of Engineering and Applied Science, California Institute of Technology (CALTECH), Centre de Formation et de Recherche sur les Environnements Méditérranéens (CEFREM), Université de Perpignan Via Domitia (UPVD)-Centre National de la Recherche Scientifique (CNRS), Department of Earth, Environmental and Planetary Sciences [Providence], Brown University, Department of Geology and Geophysics, Woods Hole Oceanographic Institution (WHOI), Géosciences Montpellier, Université des Antilles et de la Guyane (UAG)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), Technip Stone & Webster, Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), Institute of Oceanology [China], University of Freiburg [Freiburg], Graduate School of Science [Tokyo], The University of Tokyo (UTokyo)-The University of Tokyo (UTokyo), Massachusetts Institute of Technology. Department of Earth, Atmospheric, and Planetary Sciences, and Kinsley, Christopher William

Subjects
Quaternary sediments, Paleomagnetism, High-resolution age model, 010504 meteorology & atmospheric sciences, Expedition 346, Earth and Planetary Sciences(all), 010502 geochemistry & geophysics, 01 natural sciences, Isotopes of oxygen, IODP, Inter-site correlation, Sedimentary depositional environment, Paleontology, 14. Life underwater, [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography, U1430, 0105 earth and related environmental sciences, U1426, U1425, U1424, Stable isotope ratio, lcsh:QE1-996.5, lcsh:Geography. Anthropology. Recreation, Japan Sea, Drilling, lcsh:Geology, lcsh:G, 13. Climate action, Interglacial, General Earth and Planetary Sciences, IODP Expedition 346, Quaternary, Deposition (chemistry), Geology
Abstract

The Quaternary hemipelagic sediments of the Japan Sea are characterized by centimeter- to decimeter-scale alternation of dark and light clay to silty clay, which are bio-siliceous and/or bio-calcareous to a various degree. Each of the dark and light layers are considered as deposited synchronously throughout the deeper (> 500 m) part of the sea. However, attempts for correlation and age estimation of individual layers are limited to the upper few tens of meters. In addition, the exact timing of the depositional onset of these dark and light layers and its synchronicity throughout the deeper part of the sea have not been explored previously, although the onset timing was roughly estimated as ~ 1.5 Ma based on the result of Ocean Drilling Program legs 127/128. Consequently, it is not certain exactly when their deposition started, whether deposition of dark and light layers was synchronous and whether they are correlatable also in the earlier part of their depositional history. The Quaternary hemipelagic sediments of the Japan Sea were drilled at seven sites during Integrated Ocean Drilling Program Expedition 346 in 2013. Alternation of dark and light layers was recovered at six sites whose water depths are > ~ 900 m, and continuous composite columns were constructed at each site. Here, we report our effort to correlate individual dark layers and estimate their ages based on a newly constructed age model at Site U1424 using the best available paleomagnetic datum and marker tephras. The age model is further tuned to LR04 δ18O curve using gamma ray attenuation density (GRA) since it reflects diatom contents that are higher during interglacial high-stands. The constructed age model for Site U1424 is projected to other sites using correlation of dark layers to form a high-resolution and high-precision paleo-observatory network that allows to reconstruct changes in material fluxes with high spatio-temporal resolutions. [Figure not available: see fulltext.].

Published
2018
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6. Yancheva et al. reply

Author

Yancheva, Gergana, primary, Nowaczyk, Norbert R., additional, Mingram, Jens, additional, Dulski, Peter, additional, Schettler, Georg, additional, Negendank, Jörg F. W., additional, Liu, Jiaqi, additional, Sigman, Daniel M., additional, Peterson, Larry C., additional, and Haug, Gerald H., additional

Published
2007
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