三道湾子金矿Au-Ag-Te矿物成分与晶胞参数关系研究

发布时间：2018-01-29 14:47

本文关键词： 三道湾子金矿碲化物矿物晶胞参数 X射线衍射　出处：《中国地质大学(北京)》2017年硕士论文　论文类型：学位论文

【摘要】：黑龙江三道湾子金矿是典型的碲化物型金矿床,矿床中90%以上的金存在于碲化物中,碲的晶体化学性质是该领域最为关注的问题,矿床中丰富的碲化物矿物种类,对碲化物矿物晶体化学研究有重要的意义,同时为研究碲化物型矿床以及对碲化物矿物本身的矿物学内容的研究提供一个非常好的机会。本文使用光学显微镜和扫描电子显微镜(带能谱)分析矿床中碲化物矿物的产状和共生组合,在此基础上通过挑选碲化物矿物的单矿物颗粒,利用电子探针和X射线粉晶衍射研究碲化物矿物的晶胞参数,以及探讨碲化物矿物成分变化对矿物晶胞参数的影响。通过X射线粉晶衍射分析,得到该矿床中碲银矿晶胞参数平均值为a0=0.8086nm、b0=0.4476nm、co=0.8968nm、α=90.00°、β=123.21°、γ=90.00°,都是单斜晶系,碲金银矿为等轴晶系矿物,其晶胞参数平均值为a0=1.0405nm,表明碲银矿、碲金银矿是在温度较低的环境下形成的。结合碲化物矿物的成分及其晶胞参数分析认为,碲银矿中Te和Ag含量的变化对晶胞参数的影响相对较大些,Au对晶胞参数的影响相对较弱一些,具体表现为:a0与Ag含量呈弱的负相关性,b0与Ag含量呈弱的正相关性,c0与Ag含量呈明显的正相关性;a0与Te含量呈弱的正相关性,b0、c0与Te含量呈弱的负相关性;a0与Au含量呈弱的正相关性,c0与Au呈非常弱的负相关性,b0与Au含量呈非常弱的负相关性。碲银矿中银和碲含量变化对晶胞体积的影响较为明显,金含量变化对晶胞体积的影响非常小。具体表现为:碲银矿中银含量与晶胞体积呈弱的正相关性;碲含量与晶胞体积呈弱的负相关性;金含量与晶胞体积呈非常弱的正相关性。
[Abstract]:The Sandaowanzi gold deposit in Heilongjiang Province is a typical telluride type gold deposit in which more than 90% of gold is present in telluride. The crystal chemistry of tellurium is the most concerned problem in this field. The rich types of telluride minerals in the deposit are of great significance to the study of crystal chemistry of telluride minerals. It also provides a good opportunity to study the mineralogical contents of telluride deposits and the mineralogical contents of telluride minerals. In this paper, optical microscopy and scanning electron microscope (SEM) are used to study the mineralogical contents of telluride minerals. The occurrence and symbiotic assemblage of telluride minerals in the deposit are analyzed. On this basis, the unit cell parameters of telluride minerals were studied by means of electron probe and X-ray powder diffraction. The effect of mineral composition of telluride on the parameters of mineral unit cell is also discussed. By X-ray powder diffraction analysis, the average value of unit cell parameter of tellurium silver ore in this deposit is a 0. 8086 nm. B0D 0.4476nmCoC 0.8968nm, 伪 90.00 掳, 尾 123.21 掳, 纬 90.00 掳, all monoclinic systems. Tellurium gold and silver ore is an equiaxed system mineral, and the average unit cell parameter is a 0. 040 5 nm, indicating tellurium silver ore. Gold and silver tellurium ore was formed in a low temperature environment. In combination with the composition of telluride minerals and the analysis of cell parameters, it is concluded that the changes of Te and Ag contents in tellurium silver ores have relatively greater influence on the unit cell parameters. The effect of au on the unit cell parameters is relatively weak, which shows that there is a weak negative correlation between the content of Ag and the content of Ag, and there is a weak positive correlation between the content of Ag and the content of Ag, and the positive correlation between the content of C _ 0 and Ag is obvious. There was a weak positive correlation between 伪 _ 0 and Te content and a weak negative correlation between b _ (0) C _ (0) and Te content. There was a weak positive correlation between A0 and au content and a very weak negative correlation between A0 and au. The change of silver and tellurium content in tellurium silver ore has obvious influence on the unit cell volume. The effect of the change of gold content on the volume of unit cell is very small, which shows that the silver content in tellurium silver ore has a weak positive correlation with the volume of unit cell; There was a weak negative correlation between tellurium content and unit cell volume. There was a very weak positive correlation between gold content and unit cell volume.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：P618.51

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