| 滇黔桂三角区微细浸染型金矿床成矿热液一种可能的演化途径:年代学证据 |
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| 引用本文： | 胡瑞忠,苏文超,毕献武,李泽琴.滇黔桂三角区微细浸染型金矿床成矿热液一种可能的演化途径:年代学证据[J].矿物学报,1995(2). |
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| 作者姓名： | 胡瑞忠 苏文超 毕献武 李泽琴 |
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| 作者单位： | 中国科学院地球化学研究所!贵阳，550002(胡瑞忠，苏文超，毕献武)，成都理工学院!成都，610059(李泽琴) |
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| 基金项目： | 中国科学院“8．5”黄金攻关项目 |
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| 摘 要： | 本文主要根据年代学资料和金活化迁移的地球化学属性，探讨了滇黔桂三角区微细浸染型金矿床成矿热液的演化途径。多种定年方法揭示，该区金成矿初始流体（古流体）的年龄为260Ma左右；金成矿年龄约为140～75Ma。考虑到该区燕山晚期岩浆岩富含Cl，本文认为古流体（260～140Ma）向成矿流体（140～75Ma）的转化，可能主要是通过燕山晚期岩浆活动产生的富氯流体加入原已存在的贫氯古流体，从而使这种新的混合流体具有浸取金的能力来实现的。
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| 关 键 词： | 微细浸染型金矿床 古流体年龄 成矿年龄 热液演化途径 滇黔桂地区 |
A POSSIBLE EVOLUTION WAY OF ORE-FORMTING HYDROTHERMAL FLUID FOR THE CARLIN-TYPE GOLD DEPOSITS IN THE YUNNAN-GUIZHOU-GUANGXl TRIANGLE AREA |
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| Hu Ruizhong, Su Wenchao, Bi Xianwu.A POSSIBLE EVOLUTION WAY OF ORE-FORMTING HYDROTHERMAL FLUID FOR THE CARLIN-TYPE GOLD DEPOSITS IN THE YUNNAN-GUIZHOU-GUANGXl TRIANGLE AREA[J].Acta Mineralogica Sinica,1995(2). |
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| Authors: | Hu Ruizhong Su Wenchao Bi Xianwu |
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| Abstract: | Based on the chronology data and the geochemical behaviour of gold mobilization and migra-tion, this paper deals with the evolution way of oreforming hydrothermal fluid for the Carlin-type gold deposits in the Yunnan-Guizhou-Guangxi triangle area. Several dating methods revealed that the ancient fluid, from which gold ore-forming fluid evolved, was dated at about 260 Ma, and gold mineralization at 140~75Ma, corresponding to the time of Late Yenshanian magmatic rocks in the area. The fact that fluid inclusions in the deposits and Late Yenshanian magmatites in the area are all rich in chlorine suggests that the trans formation of ancient fluid (260~140 Ma) towards the ore-forming fluid (140~ 75 Ma) would be effected by mixing of the pre-existing Cl-poor ancient fluid and the Cl-rich fluid derived from Late Yenshanian magmatism, thus resulting in a new mixed fluid capable of extracting gold. |
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| Keywords: | Yunnan-Guizhou-Guangxi triangle area Carlin-type gold deposit ancient fluid age mineralization age evolution way of hydrothermal fluid |
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