| 甘肃省西成铅锌矿田矿源层的确定及其Pb—Zn活化机理研究 |
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| 引用本文： | 周乐尧.甘肃省西成铅锌矿田矿源层的确定及其Pb—Zn活化机理研究[J].地球科学,1991(2). |
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| 作者姓名： | 周乐尧 |
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| 作者单位： | 浙江地质矿产研究所 |
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| 摘 要： | 本文以地层地球化学、同位素地球化学等理论为指导,论证了西成铅锌矿田成矿金属物质主要来自基底前泥盆系;在查明矿田成矿物理化学条件和基底地层铅锌赋存形式的基础上,以成矿模拟实验为手段,探讨了基底地层中成矿元素Pb、Zn的活化机理及其控制因素。
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| 关 键 词： | 西成矿田 矿源层 活化机理 控制因素 基底地层 |
SOURCE BEDS OF ORE-FORMING METALS AND MECHA- NISM OF Pb AND Zn MOBILIZATION OF XICHENG ORE FIELD, GANSU PROVINCE |
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| Zhou Leyao.SOURCE BEDS OF ORE-FORMING METALS AND MECHA- NISM OF Pb AND Zn MOBILIZATION OF XICHENG ORE FIELD, GANSU PROVINCE[J].Earth Science-Journal of China University of Geosciences,1991(2). |
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| Authors: | Zhou Leyao |
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| Institution: | Zhe Jiang Institute of Geology and Mineral Resources |
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| Abstract: | There are two types of Pb-Zn deposits, i.e. Dengjiashan and Lijiagou in Xi-cheng Pb-Zn ore field. Both of them lie in the Middle Devonian strata, orebodies appear as stratiform or small lenticle. Based on studies of strata-geochemistry and Pb-isotope, it is indicated that ore-forming metals (Pb, Zn ) mainly derived from predevonian foundation strata in which the contents of Pb, Zn are 60.28g/t and 84.30g/t, respectively. Through phase analysis, it is showed that lead and zinc mostly exist in sulfide form, secondary silicate form, minor carbonate and absord-ed forms in foundation beds. The mobilization experiments of Pb, Zn indicates that sulfide form of Pb, Zn ( as well as absorded and carbonate form ) are able to mobilize into fluid and provide sufficient ore-forming metals under physico-chemical ore-forming conditions. At last, the paper has discussed the controlling factors of Pb, Zn mobilization of Predevonian fonndation strata. |
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| Keywords: | Xicheng ore field source bed mobilization mechanism controll- ing factor foundation strata |
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