| 云南老王寨金矿区煌斑岩岩石学研究 |
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| 引用本文： | 黄智龙,王联魁.云南老王寨金矿区煌斑岩岩石学研究[J].地质科学,1997,32(1):74-87. |
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| 作者姓名： | 黄智龙 王联魁 |
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| 作者单位： | 1. 中国科学院地球化学研究所 贵阳 550002;2. 中国科学院广州地球化学研究所 广州 510640 |
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| 摘 要： | 在研究云南老王寨金矿区与金矿化时间上、空间上密切共生的煌斑岩岩相学、矿物学以及主要元素、微量元素和同位素地球化学的基础上,总结出该区煌斑岩的岩石类型主要为云煌岩,其次为云斜煌岩,两种岩石均属碱性系列、钾质-富钾质钙碱性煌斑岩为交代富集地幔部分熔融的产物。板块俯冲进人地幔楔的地壳物质脱水形成的流体可能是引起该区地幔交代作用的主要因素。
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| 关 键 词： | 煌斑岩 岩石学 金矿床 矿化 |
| 收稿时间： | 1995-06-27 |
PETROLOGY OF LAMPROPHYRES IN LAOWANGZHAI GOLD DEPOSITS AREA,YUNNAN |
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| Huang Zhilong,Wang Liankui,Zhu Chengming.PETROLOGY OF LAMPROPHYRES IN LAOWANGZHAI GOLD DEPOSITS AREA,YUNNAN[J].Chinese Journal of Geology,1997,32(1):74-87. |
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| Authors: | Huang Zhilong Wang Liankui Zhu Chengming |
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| Institution: | 1. Institute of Geochemistry, Academia Sinica, Guiyang 550002;2. Guangzhou Institute of Geochemistry, Academia Sinica, Guangzhou 510640 |
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| Abstract: | Lamprophyres, which are temporally and spatially related to Au mineralization in Laowangzhai gold deposits area, Yunnan Province, may be divided into minettes and kersantites according to mineral assemblage. Major elements show that lamprophyres in the orefield are alkalic series and potassic calc-alkaline lamprophyres. Chondritenormalized transition element pattern of the lamprophyres is "W" type which suggests that the rocks are mantle-derived. The lamprophyres are enriched in large iron lithophile elements, high field strength elements and rare earth elements, and have high 87Sr/86Sr but low 143Nd/144Nd ratios. All the characteristics above suggest. that the source of the lamprophyres is incompatible element-enriched metasomatic mantle. |
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