Reconstructing High-resolution Deep-sea Environmental Change: Inorganic Geochemical Proxy Methods of Cold-water Bamboo Corals |
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Authors: | Haowen Dang Xiaolin Ma Ce Yang Haiyan Jin Zhimin Jian |
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Institution: | 1.State Key Laboratory of Marine Geology, Tongji University, Shanghai 200092,China;2.State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi’an 710061,China |
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Abstract: | The cold-water bamboo coral, dwelling in the depths of global seas, is characterized by the “bamboo-like” skeletal structure of alternating calcite internodes and gorgonin nodes, and has “tree-ring-like” concentric growth rings transversally. Paleoceanograhic reconstructions using bamboo coals would fill the geographic and temporal gaps of traditional means. In this work, the inorganic geochemical proxy methods for bamboo coral are introduced, including Mg/Ca for ambient temperature, Ba/Ca for seawater nutrient content, and δ11B for seawater pH. Also, the potential influences of vital effect on the proxy reconstructions are briefly discussed. With the recent findings of deep-sea bamboo coral forests in the western Pacific region, a new territory of bamboo coral paleoceanography is opened for the scientists from the nearby countries. |
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Keywords: | Cold-water bamboo coral Inorganic geochemical proxy High-resolution reconstruction |
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