| 宁夏银南氧化带金矿床方解石的矿物学研究 |
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| 引用本文： | 邱朝霞.宁夏银南氧化带金矿床方解石的矿物学研究[J].矿物学报,1991,11(1):21-26. |
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| 作者姓名： | 邱朝霞 |
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| 作者单位： | 中国地质大学 武汉 |
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| 摘 要： | 本文对银南氧化带金矿中各种方解石的矿物学研究表明：红色方解石的热释光强度大于灰色方解石和白色方解石的热释光强度,从红色解石→灰色方解石→白色方解石,CaO CO2的总量偏离理论值的程度增大,CaO/CO2比值偏离理论值的程度也增大,亦即其晶格的缺陷增多,红外吸收强度也随之增大;包裹体研究表明,本矿床的方解石可能均系地下热卤水形成。
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| 关 键 词： | 方解石 氧化带 金矿床 宁夏 矿物学 地下热卤水 |
A MINERALOGICAL STUDY OF CALCITE FROM YINNAN OXIDIZED GOLD DEPOSIT, NINGXIA, CHINA |
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| Qiu Zhaoxia.A MINERALOGICAL STUDY OF CALCITE FROM YINNAN OXIDIZED GOLD DEPOSIT, NINGXIA, CHINA[J].Acta Mineralogica Sinica,1991,11(1):21-26. |
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| Authors: | Qiu Zhaoxia |
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| Abstract: | Presented in this paper are the results of a mineralogical study of various types of calcite from the Yinnan oxidized gold deposit. It is found that the cell constants of red and grey calcites are greater than those of white one. The explanation may be that the former is higher in Ba~(2+), Pb~(2+) and Sr~(2+) whose radii are greater than that of Ca~(2+), but lower in Fe~(2+), Zn~(2+), Mg~(2+),and Mn~(2+), whose radii are less than that of Ca~(2+). The thermoluminescent intensities of red calcite are greater than those of grey and white ones because the former has higher Mn~(2+) and Pb~(2+) contents but lower Fe content. From red through grey to white calcites, the total amounts of CO_2 and CaO progressively deviate from the theoretical values, and their CaO/CO_2 ratios also deviate from the theoretical data, indicating that the defects in calcite crystals increase progressively in number. Thus, the infrared absorption intensities become greater successively. The fluid inclusion data show that the three kinds of calcite in the deposit were all formed from underground "hot-brines". |
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| Keywords: | calcite oxidized zone gold deposit Ningxia |
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