| 邱小平,王新彦.刚果（金）阿鲁维米河中游砂金成矿规律探讨[J].矿产勘查,2024,15(11):2124-2134 |
| 刚果（金）阿鲁维米河中游砂金成矿规律探讨 |
| Research on metallogenetic regulation of gold placer in middle reach of Aruwimi River， D.R. Congo |
| 投稿时间：2024-11-07 修订日期：2024-12-03 |
| DOI：10.20008/j.kckc.202411013 |
| 中文关键词: 砂金矿床 阿鲁维米河 刚果克拉通 太古宙花岗岩-绿岩地体 泛非造山作用 东非大裂谷 |
| 英文关键词: gold placer Aruwimi River Congo Craton Archean granite-greenstone terrain Pan-African orogeny the East African Rift Valley |
| 基金项目:本文受国家自然科学基金面上项目（41172075）和中国地质调查局地质调查项目“全国海陆矿产资源图件编制更新”（DD20221696）联合资助。 |
|
| 摘要点击次数: 65 |
| 全文下载次数: 26 |
| 中文摘要: |
| 刚果克拉通是著名的绿岩带金矿和金刚石聚集区，众多金矿床汇聚在刚果（金）东北部热带雨林区，并无陆路通行，唯有水路或空降才能进入矿集区。阿鲁维米河中游河谷盛产高品位砂金矿床，原住民淘金客络绎不绝。经系统采样实测砂金品位高达24.6 g/m3，为高品位砂金矿床。溯流而上追溯砂金矿来源于绿岩带金矿床，赋存在刚果克拉通太古宙花岗岩-绿岩地体。中新元古代泛非造山作用（13~6.15亿年）驱使金矿带向中新元古代构造层迁移，新生代东非大裂谷西支裂陷引发河流源头和上游整体大幅度隆升，原生金矿床裸露剥蚀，为砂金矿床提供源源不断矿源。超高品位砂金矿床的分布规律，成为在原始森林覆盖区寻找原生金矿床的重要找矿标志和勘查路径。 |
| 英文摘要: |
| Congo Craton is a famous diamond placer and gold deposit cluster in types of green-stone belt， where occurs the numerous gold deposits in tropical rain forest of northeast D.R. Congo， abd no traffic roads to approach except boating or airborne landing. The high-grade gold placer abounds in middle reach of Aruwimi River， and a steady stream of original inhabitants came for gold washing around the clock. The grade of gold placer is high in 24.6 g/m3 after systematic sampling， belonging to the super-rich gold placer deposit. We can trace back to the placer originated greenstone belt gold deposits upstream， hosted in Archean granite-greenstone terrain of Congo Craton. The gold belt immigrated to Meso-neo-Proterozoic tectonic layers driven by Meso-Neo-Proterozoic Pan-African orogeny（1300-615 Ma）， and the mountains in the western branch of East African Rift Valley uplifted intensely. Because of the rift depress during Cenozoic epoch， the primary gold deposits exposed and denudated gradually， and supplied gold grains for placer continuously. The distribution of super-rich gold placer proves to be the important prospecting indicator for exploration path. |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |