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DOI	10.1016/j.palaeo.2019.109460
	Benchtop μXRF as a tool for speleothem trace elemental analysis: Validation; limitations and application on an Eemian to early Weichselian (125–97 ka) stalagmite from Belgium
	Vansteenberge S.; de Winter N.J.; Sinnesael M.; Xueqin Z.; Verheyden S.; Claeys P.
发表日期	2020
ISSN	0031-0182
卷号	538
英文摘要	Variations of trace element (e.g. Mg, Sr, Ba, Fe, Zn etc.) concentrations along a speleothem's growth axis constitute important paleoclimate proxies. The use of laboratory micro X-ray fluorescence spectrometry as a fast and cheap alternative for conventional mass spectrometry techniques for trace element analysis on speleothems has been explored in the past and yielded satisfactory results. However, within the speleothem community there is need for an in-depth investigation of the full potential of this analytical technique. Compared to other types of paleoclimate archives, benchtop (μ)XRF analysis on speleothems is analytically more challenging because of the high-crystalline speleothem matrix and the low abundance of the elements of interest. In this study, several speleothem samples with differences in mineralogy (calcite versus aragonite) and composition are investigated. Various instrumental parameters are tested and recommendations are made for future studies applying (μ)XRF analysis to speleothems. Quantification based on a multiple standard calibration and an assessment of the error is carried out. Through validation with mass spectrometry techniques, it is confirmed that benchtop μXRF devises are able to generate speleothem trace element records. Successful results were obtained for Sr, Mg and Fe, while Zn and Ba were quantified in samples characterized by high concentrations. Nevertheless, caution has to be taken when interpreting the results, due to the presence of diffraction caused by the crystallinity of the samples. The elements which provide reliable results are sample specific and depend on the type of matrix and elemental abundance. These findings are applied on an Eemian to early Weichselian stalagmite from the Han-sur-Lesse Cave, Belgium. Time series were constructed for Mg and Sr, creating a multiproxy dataset together with previously obtained stable isotope (δ13C and δ18O) ratios, growth-rate and stalagmite morphology. It appears that Mg and Sr are not primarily controlled by prior calcite precipitation, but rather by changes in vegetation activity above the cave. © 2019 Elsevier B.V.
英文关键词	Last interglacial; Paleoclimate; Speleothem; Trace elements; X-ray fluorescence
语种	英语
scopus关键词	abundance; calcite; calibration; concentration (composition); crystallinity; Last Interglacial; magnesium; model validation; paleoclimate; precipitation (climatology); proxy climate record; speleothem; stable isotope; stalagmite; strontium; trace element; Weichselian; X-ray fluorescence; Belgium; Han sur Lesse; Namur [Belgium]
来源期刊	Palaeogeography, Palaeoclimatology, Palaeoecology
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/150677
作者单位	Department of Analytical Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, 1050, Belgium; Institute of Environment and Resources, Southwest University of Science and Technology, Mianyang, 621010, China; Department of Geology, Ghent University, Ghent, Belgium
推荐引用方式 GB/T 7714	Vansteenberge S.,de Winter N.J.,Sinnesael M.,等. Benchtop μXRF as a tool for speleothem trace elemental analysis: Validation; limitations and application on an Eemian to early Weichselian (125–97 ka) stalagmite from Belgium[J],2020,538.
APA	Vansteenberge S.,de Winter N.J.,Sinnesael M.,Xueqin Z.,Verheyden S.,&Claeys P..(2020).Benchtop μXRF as a tool for speleothem trace elemental analysis: Validation; limitations and application on an Eemian to early Weichselian (125–97 ka) stalagmite from Belgium.Palaeogeography, Palaeoclimatology, Palaeoecology,538.
MLA	Vansteenberge S.,et al."Benchtop μXRF as a tool for speleothem trace elemental analysis: Validation; limitations and application on an Eemian to early Weichselian (125–97 ka) stalagmite from Belgium".Palaeogeography, Palaeoclimatology, Palaeoecology 538(2020).