| 王奖臻,陆彦,李泽琴,孙燕,罗丽,姚祖德,赵支刚.西范坪斑岩铜矿的次生富集作用研究[J].地质找矿论丛,2001,(4):232-237 |
| 西范坪斑岩铜矿的次生富集作用研究 |
| SUPERGENE ENRICHMENT OF XIFANPING PORPHYRY COPPER DEPOSIT, SICHUAN, CHINA |
| 投稿时间：2001-06-11 修订日期：2001-10-11 |
| DOI：10.6053/j.issn.1001-1412.2001.4. 004 |
| 中文关键词: 西范坪铜矿 斑岩型矿床 次生富集作用 四川省 |
| 英文关键词:Xifanping Cu mine porphyry Cu deposit secondery enrichment Sichuan |
| 基金项目:国家自然科学基金项目(编号:40172039)资助 |
| 作者 | 单位 | | 王奖臻 | 中国科学院地球化学研究所矿床地球化学开放实验室, 贵州, 贵阳, 550002
成都理工学院 ,四川, 成都, 610059 | | 陆彦 | 成都理工学院 ,四川, 成都, 610059 | | 李泽琴 | 成都理工学院 ,四川, 成都, 610059 | | 孙燕 | 成都理工学院 ,四川, 成都, 610059 | | 罗丽 | 成都理工学院 ,四川, 成都, 610059 | | 姚祖德 | 四川省地矿厅攀西地质大队, 四川, 西昌, 615000 | | 赵支刚 | 四川省地矿厅攀西地质大队, 四川, 西昌, 615000 |
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| 中文摘要: |
| 通过对3000余米岩芯的观察研究,发现西范坪斑岩铜矿床存在完整的氧化带,氧化剖面由上向下可以分为氧化带、次生富集带和原生带。原生矿石的裂隙越发育、原生矿化强度越大,则其次生富集作用越发育。应用质量平衡方法计算了氧化过程中铜的迁移规律,提出在次生富集作用中铜除了发生垂向(由上向下)迁移外,也存在侧向迁移(带入或带出)。在矿床中部,由于铜的垂向富集和侧向带入而形成富矿石和厚大矿体,因此次生富集对西范坪斑岩铜矿床富矿体的形成起到了重要的作用。 |
| 英文摘要: |
| Xifanping porphyry copper deposit has been subjected to oxidation and secondary sulfide enrichment. There is a blankets of chalcocite in the porphyry copper system. The zone of oxidation and secondary sulfide has been recoganized by the data from drill holes,such as grade of Cu, minerals assemblage, and texture of ore. The profile of the oxidation and secondary enrichment are:leached capping (oxidation zone), enriched zone, and primary sulfides zone.The grade of Cu in leached capping often is 0.02wt%. This is much lower than that of the primary sulfides zone, which is usually 0.2 to.0.3wt%. But the grade of Cu in the enrichment zone usually is 0.4 to 0.8%. The higher the density of fracture of the ore (permeability),the stronger of the secondary sulfide enrichment in the deposit. It has been proved Brimhalls'method that in some holes there are lateral fluxes of Cu from source areas to the blanket of the holes. The thick of the chalcocite blanket of these holes is about 100 meters,much thicker than the blanket of others. |
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