| 四川石棉县大水沟碲矿床地质与成因 |
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| 引用本文： | 骆耀南,付德明,周绍东,曹志敏,李保华. 四川石棉县大水沟碲矿床地质与成因[J]. 四川地质学报, 1994, 0(2) |
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| 作者姓名： | 骆耀南 付德明 周绍东 曹志敏 李保华 |
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| 作者单位： | 四川省地矿局，成都理工学院 |
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| 摘 要： | 四川石棉大水沟碲矿是我国发现的世界首例独立磅矿床，并具Ｔｅ、Ｂｉ、Ｓｅ、Ａｕ、Ａｇ多元素矿化。通过对该矿床的地质特征、矿石学与流体包裹体、同位素地球化学进行分析研究后，指出该矿床受韧性－脆性剪切带构造岩片和隐伏花岗岩底辟热穹隆的双重控制，以中下三叠统动热变质大理岩－绿片岩－千枚岩组合地层为赋矿围岩，热液蚀变发育碳酸盐化、硅化等。流体包裹体和稳定同位素地球化学研究表明，流体属低氧逸度、高二氧化碳逸度，深成中温热液成矿作用，物质来源于地壳深部，后期受大气降水影响。Ｋ－Ａｒ法测年与铅同位素两阶段模式年龄一致，成矿时代属燕山早期（１４４．２－１５０Ｍａ），与区域分布的花岗岩关系密切。
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| 关 键 词： | 碲矿床，地质特征，矿床成因，四川石棉县 |
GEOLOGY AND GENESIS OF DASHUIGOU TELLURIUM DEPOSIT,SHIMIAN,SICHUAN |
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| Luo Yaonan,Fu Deming and Zhou Shaodong. GEOLOGY AND GENESIS OF DASHUIGOU TELLURIUM DEPOSIT,SHIMIAN,SICHUAN[J]. Acta Geologica Sichuan, 1994, 0(2) |
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| Authors: | Luo Yaonan Fu Deming Zhou Shaodong |
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| Affiliation: | Luo Yaonan;Fu Deming and Zhou Shaodong(Sichuan Bureau of Geology and Mineral Resources)Cao Zhimin and Li Baohua(Chengdu Institute of Technology) |
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| Abstract: | Dashuigou tellurium deposit,Shimian, Sichuan,is an independent tellurium deposit associated with Bi-Se-Au-Ag mineralization discovered firstly in the world. The deposit is hosted by dynamothermal metamorphic marble-greenschist-phyllite of the Middle and Lower Triassic,and the orebodies are controlled by a ductile-brittle shear zone and by a hidden granite diapir-thermal dome.The host rock was subjected to carbonatization and silicification.Research on fluid inclusion and stable isotope geochemistry indicates that the ore fluid with a low fO2 and a high fco2 was a mesothermal solution. The ore-forming material was derived from deep crust.K-Ar age is conform with lead-isotope model age,being 144.2 -150Ma. The ore-formation was in close relationship with the Early Yanshan granite in this region. |
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| Keywords: | tellurium deposit geologic characteristic metallogeny Shimian Sichuan |
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