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引用本文:杨波,刘兴起,王永波.湖泊沉积物碳酸盐含量的XRD半定量分析.湖泊科学,2014,26(4):637-640. DOI:10.18307/2014.0420
YANG Bo,LIU Xingqi,WANG Yongbo.Carbonate contents of lake sediments determined by XRD method. J. Lake Sci.2014,26(4):637-640. DOI:10.18307/2014.0420
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湖泊沉积物碳酸盐含量的XRD半定量分析
杨波1, 刘兴起2, 王永波3,4
1.中国科学院青海盐湖研究所, 盐湖资源与化学重点实验室, 西宁 810008;2.首都师范大学资源环境与旅游学院, 北京 100048;3.Alfred Wegener Institute for Polar and Marine Research, Research Unit Potsdam, Potsdam 14473;4.Department of Geoscience, University of Potsdam, Golm 14476
摘要:
湖泊沉积中的碳酸盐对于气候环境具有很好的指示意义.利用化学分析方法(气量法)和X衍射(XRD)方法,对青藏高原可可西里库赛湖KS-2006孔沉积物中的碳酸盐含量进行了半定量分析.结果表明:虽然KS-2006孔沉积物中的矿物种类达9种之多,且XRD的测量误差(±5%)高于气量法的测量误差(±0.8%);但XRD法获得的KS-2006孔沉积物碳酸盐总含量的平均值(18.9%)以及波动范围(7%~39%),同气量法所获得的碳酸盐含量的平均值(19.4%)和波动范围(5.0%~30.7%)基本一致,而且二者具有很好的正相关关系(相关系数R2为0.3940),随深度的波动趋势一致,说明XRD方法在半定量分析湖泊沉积物碳酸盐矿物种类及其含量方面,具有很高的可靠性.
关键词:  湖泊沉积碳酸盐  气量法  XRD  半定量分析
DOI:10.18307/2014.0420
分类号:
基金项目:中国科学院战略性先导科技专项项目(XDA05080403);国家自然科学基金项目(41372176);中国科学院盐湖资源与化学重点实验室开放基金项目(KLSLRC-KF-13-DX-1)联合资助
Carbonate contents of lake sediments determined by XRD method
YANG Bo1, LIU Xingqi2, WANG Yongbo3,4
1.Key Laboratory of Salt Lake Resources and Chemistry, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, P. R. China;2.College of Environmental Resources and Tourism, Capital Normal University, Beijing 100048, P. R. China;3.Alfred Wegener Institute for Polar and Marine Research, Research Unit Potsdam, Potsdam 14473, Germany;4.Department of Geoscience, University of Potsdam, Golm 14476, Germany
Abstract:
Carbonate in lake sediments has an indicative significance for climate and environment. In this paper, the carbonate contents were semi-quantitatively analyzed by meaning of chemical analysis(gasometric method) and X-ray diffraction(XRD method), which were from the sediments of the core KS-2006 of Lake Kusai in Hoh Xil region, Qinghai-Tibetan Plateau. The results showed that there were at least nine kinds of minerals in the core KS-2006, and the measurement error of XRD method(± 5%) was higher than that of gasometric method(± 0.8%). However, the XRD method obtained the average value(18.9%) and variation range(7%-39%) of the total carbonate contents from the sediments of the core KS-2006, which was basically identical with the average value(19.4%) and variation range(5.0%-30.7%) comparing with both of the result. Meanwhile, it showed a positive correlation between the XRD method and gasometric method, and fluctuation tendency with the depth was uniform. This indicated that the XRD method was a reliable method which can be well used to semi-quantitatively analyze the kinds of carbonate minerals and determine their content in lake sediments.
Key words:  Carbonate in lake sediments  gasometric method  XRD  semi-quantitative analysis
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