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Climate of the Past An interactive open-access journal of the European Geosciences Union
Clim. Past, 13, 511-531, 2017
https://doi.org/10.5194/cp-13-511-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
Research article
23 May 2017
Sedimentary record from the Canada Basin, Arctic Ocean: implications for late to middle Pleistocene glacial history
Linsen Dong1,2, Yanguang Liu1,2, Xuefa Shi1,2, Leonid Polyak3, Yuanhui Huang1,2, Xisheng Fang1, Jianxing Liu1,2, Jianjun Zou1,2, Kunshan Wang1,2, Fuqiang Sun1, and Xuchen Wang4 1Key Laboratory of Marine Sedimentology and Environmental Geology, First Institute of Oceanography, State Oceanic Administration, Qingdao, 266061, China
2Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266061, China
3Byrd Polar and Climate Research Center, The Ohio State University, Columbus, 43210, USA
4Key Laboratory of Marine Chemistry Theory and Technology, Ocean University of China, Qingdao, 266100, China
Abstract. Sediment core ARC4-BN05 collected from the Canada Basin, Arctic Ocean, covers the late to middle Quaternary (Marine Isotope Stage – MIS – 1–15, ca. 0.5–0.6 Ma) as estimated by correlation to earlier proposed Arctic Ocean stratigraphies and AMS14C dating of the youngest sediments. Detailed examination of clay and bulk mineralogy along with grain size, content of Ca and Mn, and planktic foraminiferal numbers in core ARC4–BN05 provides important new information about sedimentary environments and provenance. We use increased contents of coarse debris as an indicator of glacier collapse events at the margins of the western Arctic Ocean, and identify the provenance of these events from mineralogical composition. Notably, peaks of dolomite debris, including large dropstones, track the Laurentide Ice Sheet (LIS) discharge events to the Arctic Ocean. Major LIS inputs occurred during the stratigraphic intervals estimated as MIS 3, intra-MIS 5 and 7 events, MIS 8, and MIS 10. Inputs from the East Siberian Ice Sheet (ESIS) are inferred from peaks of smectite, kaolinite, and chlorite associated with coarse sediment. Major ESIS sedimentary events occurred in the intervals estimated as MIS 4, MIS 6 and MIS 12. Differences in LIS vs. ESIS inputs can be explained by ice-sheet configurations at different sea levels, sediment delivery mechanisms (iceberg rafting, suspension plumes, and debris flows), and surface circulation. A long-term change in the pattern of sediment inputs, with an apparent step change near the estimated MIS 7–8 boundary (ca. 0.25 Ma), presumably indicates an overall glacial expansion at the western Arctic margins, especially in North America.

Citation: Dong, L., Liu, Y., Shi, X., Polyak, L., Huang, Y., Fang, X., Liu, J., Zou, J., Wang, K., Sun, F., and Wang, X.: Sedimentary record from the Canada Basin, Arctic Ocean: implications for late to middle Pleistocene glacial history, Clim. Past, 13, 511-531, https://doi.org/10.5194/cp-13-511-2017, 2017.
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In this manuscript, we present the results of our study conducted for a sediment core (ARC4-BN05) collected in the Arctic Ocean. Detailed examination of clay and bulk mineralogy along with grain size, content of Ca and Mn, and planktonic foraminiferal numbers in core ARC4–BN05 provides important new information about sedimentary environments and provenance. Based on these proxies, we try to reveal late to middle Pleistocene glacial history.
In this manuscript, we present the results of our study conducted for a sediment core...
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