Abstract
A 324-cm-long sediment core was obtained from Prydz Bay, Antarctica, during the 29th Chinese National Antarctic Research Expedition. Based upon sediment grain size, 14C, TOC, δ13C, and magnetism data, we show that the major magnetic minerals are ferrimagnetic pseudo single domain (PSD)-multi domain (MD) magnetite. Variations in the paleoenvironmental proxy records allow us to define four zones in the core. These zones broadly delineate climatic variations in the region since the late Early Pleistocene, with a warm period, a transitional period, and a cold period. The magnetic particle assemblage varies with glacial-interglacial cycles. Abrupt changes in particle size, TOC content, and magnetism occur at 102–90 cm depth in the core, indicating a sudden warming in the Antarctic region, signaling the onset of the Holocene. We identified three additional climatic signals in the middle part of the core (232–162 cm) that show unexpected cooling events during the warm period in Prydz Bay.
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Acknowledgments
We thank Linggang Tang for assisting with magnetic hysteresis loops and χ–T curve experiments, as well as the scientific staff and the crew of R/V Xuelong during the 29th Chinese National Antarctic Research Expedition.
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Lin, Z., Han, X., Jin, X., Yi, L., Li, Z. (2020). Paleomagnetic and Sedimentary Evidence for the Multi-stage Paleoenvironmental Evolution of Prydz Bay Based on Big Data Analytics. In: Xu, Z., Choo, KK., Dehghantanha, A., Parizi, R., Hammoudeh, M. (eds) Cyber Security Intelligence and Analytics. CSIA 2019. Advances in Intelligent Systems and Computing, vol 928. Springer, Cham. https://doi.org/10.1007/978-3-030-15235-2_17
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