| 粘土沉积物XRD定量分析方法 |
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| 引用本文： | 邓学能.粘土沉积物XRD定量分析方法[J].沉积学报,1993,11(4):99-104. |
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| 作者姓名： | 邓学能 |
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| 作者单位： | 西南冶金地质科学研究所 |
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| 摘 要： | 从理论上推导了无序混合层粘土矿物混层比f与XRD视面网间距d之间的近似函数关系,制定出I/S混层矿物的d-f换算表;通过对济阳拗陷泥质岩石的研究,从一种新的途径求出了粘土矿物的强度因子,提出混层矿物XRD强度因子与混层比的线性关系式。根据不同的制样方法,利用微机运算,可以对粘土沉积物中的6种或10种矿物进行大量快速的定量分析。
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| 关 键 词： | 粘土矿物 X射线衍射 定量分析 |
A Method of XRD Quantitative Analysis for Argillaceous Sediments |
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| Institution: | South -West Research Institute of Metallurgical Geology |
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| Abstract: | As we research argillaceous sediments containing some interstratified clay minerals by the method of XRD quantitative analysis, the first parameter that needs to determinate is the proportion (f) of two component layers. Theoretically, we led to an approximate functional relationship between the proportions (f) and the observed XRD layer spaces (d) of randomly interstratified clay minerals. Therefor we made out a d -f contrasting table for illite/montmorillonite. The intensity parameter K of one mineral is the fundamental parameter for XRD quantitative analysis. Generally, researchers can't separate single clay mineral from argillaceous sediments. In this case, by a special way, we obtained the K values of clay minerals in Jiyang basin. The method of XRD quantitative analysis for argillaceous sediments have applied to hundreds of samples successfully. For the natural oriented section, we can more accurately obtain the relative contents of six minerals, including montmorillonite, I/S interlayer, clastic illite, kaolinite, chlorite and muscovite. For the random powder sample, we can obtain the relative contents of ten minerals, including quartz, feldspar, cal-cite and dolomite except for the six ones listed above. Only one diffraction profile of natural sample is necessary. |
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