Mineralogical Characteristics of a Kind of Red Stone Needle
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摘要: 采用X射线粉末衍射（XRD）、扫描电子显微镜（SEM）、热重分析（TG－DTG）及激光诱导离解光谱（LIBS）等分析方法对一种红色砭石的矿物学特征进行了深入的研究。XRD分析表明，红色砭石主要由白云石组成，并含有少量石英和方解石及微量云母、正长石和赤铁矿。SEM结果显示，砭石中的矿物颗粒大多为集合体，粒径大多集中在1～5μm之间，表面光滑程度有所不同。红色砭石在650～850℃范围内出现一个单失重峰，为白云石的分解形成，类质同象或者杂质矿物的存在导致白云石两阶段的分解同步完成。红色砭石的颜色可能与赤铁矿和正长石微晶在砭石中的均匀分布有关。Abstract: This paper investigates the mineralogical characteristics of a kind of red stone needle by using X-ray diffraction(XRD), scanning electron microscopy(SEM), thermogravimetric analysis(TG-DTG)and laser induced breakdown spectroscopy(LIBS).The XRD result shows that the red stone needle is mainly composed of dolomite, containing minor quartz and calcite, and trace mica, orthoclase and hematite.SEM result indicates that mineral aggregates dominate in the red stone needle with their grain size ranging from 1μm to 5μm and different degrees of smoothness on their surfaces.A single weightlessness peak occurs between 650℃ and 850℃, which should be attributed to the thermal decomposition of dolomite and the occurrence of isomorphism or foreign minerals leading to the simultaneous accomplishment of the two-stage decompositions.The coloration might result from the average distribution of hematite and orthoclase in the red stone needle.
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Keywords:
- stone needle /
- mineralogical characteristic /
- dolomite /
- aggregate /
- isomorphism
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[1] 谢先德,王辅亚,谢楠柱,等.泗滨砭石的岩石矿物研究I:岩石化学和岩石结构特征与红外发射功能的关系[J].矿物岩石地球化学通报,2008,27(1):1-5. [2] 谢先德,孙振亚,王辅亚,等.泗滨砭石的岩石矿物研究Ⅱ:矿物组成特征与红外发射功能的关系[J].矿物岩石地球化学通报,2008,27(1):6-12. [3] 谢先德,王辅亚,孙振亚,等.泗滨砭石的矿物组成特征及其与砭石理疗功能的关系[J].矿物岩石地球化学通报,2007,26(增刊):125-127. [4] Hong H,Zhang K,Li Z.Climatic and tectonic uplift evolution since~7Ma in Gyirong basin,southwestern Tibet plateau:clay mineral evidence[J].International Journal of Earth Sciences,2009,99(6):1 305-1 315.
[5] 辽宁省地质局中心实验室.矿物差热分析[M].北京:地质出版社,1975.51-52. [6] 彭华,王少君.内蒙白云鄂博白云石和方解石的差热分析研究[J].武汉理工大学学报,2001,23(8):30-41. [7] 顾长光.碳酸盐矿物热分解机理的研究[J].矿物学报,1990,10(3):266-272. [8] Smykatz-Kloss W.Application of differential thermal analysis in mineralogy[J].Journal of Thermal Analysis and Calorimetry,1982,23(1-2):15-44.
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