Application of Avaatech X-ray fluorescence core-scanning in Sr/Ca analysis of speleothems
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Application of X-ray fluorescence core-scanning (XRF-CS) on both marine and lake sediments has achieved remarkable results. However, its application has not been widely extended to the research on speleothems. In this study, we measure the Sr abundance and the Sr/Ca ratios of three stalagmites (two aragonite stalagmites, one calcite stalagmite) using the state-of-the-art fourth-generation Avaatech high-resolution XRF core scanner. Through comparisons among different scan paths and among different scan resolutions, as well as comparisons with inductively coupled plasma optical emission spectrometer (ICP-OES), Itrax XRF, and Artax XRF results, we confirm that the Avaatech XRF core scanner could precisely, quickly, and non-destructively analyze the high-resolution Sr abundance of speleothems. Furthermore, we combine the stalagmite δ18O records to explore the paleoclimatic significance of the measured stalagmite Sr/Ca.
KeywordsAvaatech XRF Speleothem Sr/Ca Paleoclimate
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We thank the two reviewers for their constructive comments. This work was supported by the National Key Research and Development Program of China (Grant No. 2017YFA0603401), Shaanxi Science Fund for Distinguished Young Scholars (Grant No. 2018JC-023), Youth Innovation Promotion Association (Grant No. 2012295) and West Light Foundation of Chinese Academy of Sciences. This work is a part of The “Belt & Road” Project of the Institute of Earth Environment, Chinese Academy of Sciences.
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