| 广西大厂长坡锡石硫化物矿床锡石晶胞参数的初步研究 |
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| 引用本文： | 韩照信.广西大厂长坡锡石硫化物矿床锡石晶胞参数的初步研究[J].岩石矿物学杂志,1987,6(4):368-371. |
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| 作者姓名： | 韩照信 |
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| 作者单位： | 西安地质学院 |
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| 摘 要： | 矿床为高中温热液型锡石硫化物矿床,通过研究知道随成矿温度由高到低,成矿阶段由锡石—石英经锡右硫化物到锡石—方解石,锡石晶胞的轴长,特别是c轴长和晶胞体积都有增大趋势。锡石中含有Fe等杂质元素,它们可以类质同像代替Sn,由于这些元素离子半径小,类质同像代替结果导致晶胞变小。而在高温条件下,元素类质同像代替较易进行,这就造成了高温阶段形成的锡石晶胞小,低温阶段形成的锡石晶胞大。
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| 关 键 词： | 锡石 晶胞参数 广西 |
A Tentative Study on Unit Cell Parameter of Cassiterite from the Changpo Cassiterite Sulphide Deposit in Dachang, Guangxi |
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| Han Zhaoxin Xian Institute of Geology,Xian.A Tentative Study on Unit Cell Parameter of Cassiterite from the Changpo Cassiterite Sulphide Deposit in Dachang, Guangxi[J].Acta Petrologica Et Mineralogica,1987,6(4):368-371. |
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| Authors: | Han Zhaoxin Xian Institute of Geology Xian |
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| Abstract: | The ore deposit is a hypothermal-mesothermal cassiterite sulphide one.It has been revealed through the author's investigation that with the decreasein ore-forming temperature the mineralization stages varied from cassiterite-quartz through cassiterite-sulphides to cassiterite-calcite, and cassiterite sho-wed tendency of growth both in lengths of unit cell axes, especially axis C,and in unit cell dimensions. There exist such admixture elements as Fe in cassiterite which can subs-titute isomorphously for tin. As ionic radii of these elements are usually small,the isomorphism might cause unit cell to shrink. At high temperature, isomor-phous substitution of elements takes Place rather readily, and this probablyaccounts for small unit cell of cassiterite at high temperature and larger oneat low temperature. |
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| Keywords: | cassiterite unit cell parameter Guangxi |
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