| 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 |
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杨波1, 刘兴起2, 王永波3,4
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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
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| 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 |
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| 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 |
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| Carbonate contents of lake sediments determined by XRD method |
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YANG Bo1, LIU Xingqi2, WANG Yongbo3,4
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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
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| 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 |
