| 刘晓阳.坦桑尼亚卢帕金矿田元素地球化学特征及其找矿意义[J].地质与勘探,2018,54(6):1256-1269 |
| 坦桑尼亚卢帕金矿田元素地球化学特征及其找矿意义 |
| Element geochemical characteristics and prospecting implications of the Lupa Goldfield, Tanzania |
| 投稿时间：2018-06-21 修订日期：2018-11-16 |
| DOI：10.12134/j.dzykt.2018.06.018 |
| 中文关键词: 坦桑尼亚 卢帕金矿田 地球化学特征 找矿意义 |
| 英文关键词: Tanzania, Lupa goldfield, geochemical characteristics, prospecting implication |
| 基金项目:中国地质调查局“周边国家成矿带对比研究”工程下属二级项目：“海上丝绸之路非洲中
东部7国矿产资源潜力评价”（编号:121201006000150014）资助 |
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| 中文摘要: |
| 卢帕（Lupa）金矿田位于坦桑尼亚西南部，是仅次于北部维多利亚湖金矿田的重要产金区。通过区域1∶25万原生晕地球化学测量结合水系沉积物测量资料分析发现，本区Au元素在片麻岩、基性超基性岩和中性岩内相对富集且分异性较高，在花岗岩和变质沉积岩内则相对贫化，且分异性较差；本区与金矿化伴生的元素为Bi、Ag、Hg、Mo、Pb和W。结合Au成矿地质特征分析，认为矿田内金矿类型更倾向于造山型，且存在多期次叠加成矿的特点。因此建议在后期的勘查中应首要解析矿区构造，特别是剪切带构造。 |
| 英文摘要: |
| The Lupa Goldfield is located in the southwest of Tanzania, which is an important gold-producing area after the northern Victoria Lake Goldfield. A regional 1:250,000 geochemical survey indicates that the Au element in this area is relatively enriched in gneiss, mafic-ultramafic rocks and neutral rocks with high dissension, and relatively depleted in granite and metamorphic sedimentary rocks with poor dissension. The elements associated with gold mineralization in this area include Bi, Ag, Hg, Mo, Pb, and W. These data, combined with the analysis of Au mineralization, indicate that the gold mineralization in the Lupa Goldfield is more inclined to orogenic gold deposits, which experienced multiple periods of superimposed metallogenic processes. Therefore, it is suggested that the structure in the mining area, especially the structure of the shear zone, should be analyzed first in the later exploration. |
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