| 某蚀变花岗岩型铌钽矿床中钠长石化和天河石化 |
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| 引用本文： | 宋桂森.某蚀变花岗岩型铌钽矿床中钠长石化和天河石化[J].地球化学,1981(4):337-342,i001. |
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| 作者姓名： | 宋桂森 |
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| 作者单位： | 内蒙古地质实验室 |
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| 摘 要： | A Nb-, Ta-, rare metal deposit has been discovered in a albitization-, amazonitization-granite by using amazonite as an indicator. The ore-bearing dyke, early Yanshanian in age, occurs in a Late Jurassic metamorphic sandstone and breccia. Three stages of albite can be distinguished, showing regular variation in composition, optical property and structure with respective to different generations. Two generations of amazonite are noticed and studies are made on their composition and structure by using optical and X-ray diffraction methods. Amazonite is readily recognizable in the field by its colonr. Its occurrence with albitization can be used as a prospecting indicator for Nb, Ta and other rare metals.
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| 关 键 词： | 蚀变花岗岩 铌钽矿床 钠长石化 天河石化 矿区地质 |
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