福建紫金山Cu-Au矿床中地开石的矿物学特征

发布时间：2018-11-14 12:38

【摘要】：地开石在陶瓷、涂料、化妆品及填料的工业应用中有着广泛潜力。在本研究中,挑选紫金山Au-Cu矿床中三种典型的地开石(透明、半透明和不透明)和一种矿区分布广泛的淋滤型地开石,通过电子探针(EPMA),X射线粉末衍射(XRD)、傅立叶红外光谱(FT-IR)和场发射扫描电子显微镜(FESEM)表征矿物学特征。EPMA成分对比分析表明,地开石纯度均较高,Al2O3和Si O2质量分数低,Fe O质量分数低,白度很高,可以有效地应用到造纸工业中。XRD和FT-IR结果表明,不透明地开石结晶较好,有序度较高,随着透明度的增加,透明地开石的有序度降低,结晶较差。FESEM分析表明,不透明的地开石晶粒发育较好,片层之间堆积紧密,晶粒横向最大尺寸为5μm,随着透明度的增加,晶粒横向尺寸减小,透明地开石的晶粒为0.2~1μm;淋滤型地开石可见假六方状片层相互堆积,但由于酸性淋滤作用,片层上有很多小空洞,且片层的边缘溶解,堆积松散,这种淋滤地开石的间层有利于其他高分子材料插入,可用于制备地开石-高分子复合材料。此外,对紫金山Au-Cu矿床地开石的矿物学特征的研究,弄清了地开石之间的形成关系,以及与矿区的成矿关系。
[Abstract]:Decausite has wide potential in industrial applications of ceramics, coatings, cosmetics and fillers. In this study, three types of typical ground quarts (transparent, translucent and opaque) and a widely distributed leaching type in the Zijinshan Au-Cu deposit were selected. The (XRD), was diffracted by electron probe (EPMA), X ray powder. Fourier transform Infrared Spectroscopy (FT-IR) and Field Emission scanning Electron Microscopy (FESEM) were used to characterize the mineralogical characteristics. The comparative analysis of EPMA composition showed that the tetracyte had high purity, low Al2O3 and Si O 2 mass fraction, low, Fe O mass fraction and high whiteness. The results of XRD and FT-IR show that the opacity is better and the order degree is higher. With the increase of transparency, the order degree of transparent open stone decreases and the crystallization is poor. The opacity of the crystal is well developed, the lamellar stacking is close, the maximum transverse size of the grain is 5 渭 m. With the increase of transparency, the transverse size of the grain decreases, and the grain size of the transparent rock is 0.2 渭 m. The pseudo-hexagonal lamellae can be seen stacking each other, but due to acid leaching, there are many small voids on the lamellae, and the edge of the lamellar dissolves and accumulates loosely. The interlayer of the leachate is favorable to the intercalation of other polymer materials. It can be used to prepare dicaulite-polymer composites. In addition, the mineralogical characteristics of the open rock in Zijinshan Au-Cu deposit are studied, and the relationship between the formation of the rock and the mineralization of the deposit is clarified.
【作者单位】：福州大学材料学院;福州大学紫金矿业学院;紫金矿业集团股份有限公司;
【基金】：国家自然科学基金(编号:41002016) 福建省教育厅基金(编号:810092) 福州大学科技发展基金(编号:650075)
【分类号】：P578.94;P618.41;P618.51

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