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| 都龙锡锌矿床绿泥石特征及其成矿意义 | |
| 引用本文： | 廖 震,刘玉平,李朝阳,叶霖,刘世荣,郑文勤.都龙锡锌矿床绿泥石特征及其成矿意义[J].矿床地质,2010,29(1):169-176. |
| 作者姓名： | 廖 震 刘玉平 李朝阳 叶霖 刘世荣 郑文勤 |
| 作者单位： | 1. 中国科学院地球化学研究所矿床地球化学国家重点实验室,贵州,贵阳,550002;有色金属矿产地质调查中心,北京 100012 2. 中国科学院地球化学研究所矿床地球化学国家重点实验室,贵州,贵阳,550002 3. 中国科学院广州地球化学研究所,广东,广州,510640 |
| 基金项目： | 国家自然科学基金项目(40302026);;973项目(G2007BC04008);;“危机矿山接替资源”项目(20089933)的资助 |
| 摘 要： | 都龙锡锌超大型矿床是中国第三大锡石硫化物矿床,其中的绿泥石化相当普遍,并与矿化关系密切。本文在岩矿鉴定基础上,利用电子探针对绿泥石进行了微区化学成分研究。研究结果表明,该矿床绿泥石为富铁种属的假鳞绿泥石、鲕绿泥石、蠕绿泥石(铁绿泥石)及铁镁绿泥石,指示形成于还原环境;绿泥石为泥质岩或铁镁质岩受热液交代蚀变的产物,绿泥石结构的离子置换主要体现为Fe对Mg的置换,反映其形成与含铁建造有关;绿泥石的形成温度为231～304℃,平均为269℃,属于中-低温范围。绿泥石的形成机制主要表现为溶蚀-结晶、溶蚀-迁移-沉淀结晶2种。绿泥石可能与锡成矿同期形成,其与矿石矿物的生成关系表明,燕山期岩浆活动对都龙矿床的叠加改造作用显著。 |
| 关 键 词： | 地质学 绿泥石 组成特征 形成环境 成矿意义 都龙锡锌矿床 滇东南 |
Characteristics of chlorites from Dulong Sn-Zn deposit and their metalloge nic implications |
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| LIAO Zhen,LIU YuPing,LI ChaoYang,YE Lin,LIU ShiRong,ZHENG WenQin.Characteristics of chlorites from Dulong Sn-Zn deposit and their metalloge nic implications[J].Mineral Deposits,2010,29(1):169-176. | |
| Authors: | LIAO Zhen LIU YuPing LI ChaoYang YE Lin LIU ShiRong ZHENG WenQin |
| Institution: | 1 State Key Laboratory of Ore Deposit Geochemistry/a>;Institute of Geochemistry/a>;Chinese Academy of Sciences/a>;Guiyang 550002/a>;Guizhou/a>;China/a>;2 China Non-ferrous Metals Resource Geological Survey/a>;Beijing 100012/a>;3 Guangzhou Institute of Geochemistry/a>;Guangzhou 510640/a>;Guangdong/a>;China |
| Abstract: | The Dulong superlarge Sn-Zn deposit is the third largest cassiterite sulfide deposit in China. Chlorite is one of the main hy-drothermal alteration minerals genetically related to tin mineralization in this ore deposit. By means of microscopic and electron micro-probe analysis, the user investigated chemical composition and texture of the chlorite and concluded that chlorites in the Dulong Sn-Zn deposit have the following characteristics: ① they are mainly Fe-rich chlorites composed of pseudothuringite, chamosite, prochlorite and brunsvigite, indicating a reducing environment during their user; ②they were produced by hydrothermal alteration of pelitic or mafic rocks, and the phenomenon that Fe-Mg substitution dominates the octahedral substitution suggests that their formation had to do with the iron-rich formation; ③they were formed at temperatures of 231-304℃ (averagely 269 ℃ ) , in the range of low-mod-erate temperature; and ④ both chlorites and cassiterite were formed in the Late Yanshanian magmatic hydrothermal ore-forming user that occurred under the low-moderate temperature reducing condition. |
| Keywords: | geology chlorite composition and texture characteristics user environment ore-forming implication Dulong Sn-Zn deposit southeastern Yunnan |
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