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坦桑尼亚太古界卡维隆多群杂砾岩型金矿化特征及其发现意义
- 作者：
- 司建涛|杜晓冉|白德胜|张明礼|董岘证|孙进|柴丽洁
- 作者单位：
- 河南省地质矿产勘查开发局第二地质矿产调查院|河南省岩石矿物测试中心|河南省地质矿产勘查开发局第二地质矿产调查院|河南省地质矿产勘查开发局第二地质矿产调查院|河南省地质矿产勘查开发局第二地质矿产调查院|河南省地质矿产勘查开发局第二地质矿产调查院|河南省地质矿产勘查开发局第二地质矿产调查院
基金项目：
- 河南省财政地质勘查项目（豫自然资发〔2019〕22号）
详细信息：
- 作者简介：
- 司建涛（1981—），男，高级工程师，硕士，从事非洲固体矿产资源勘查和区域资源潜力评价工作；E-mail：sijiantao@163.com
- 通讯作者：
- isnull
- PDF下载
Gold mineralization characteristics and discovery significance of the Archaean Kavirondian Group conglomerate in Tanzania
- English Author：
- No.2 Institute of Geological & Mineral Resources Survey of Henan|Henan Provincial Testing Center for Rocks and Minerals|No.2 Institute of Geological & Mineral Resources Survey of Henan|No.2 Institute of Geological & Mineral Resources Survey of Henan|No.2 Institute of Geological & Mineral Resources Survey of Henan|No.2 Institute of Geological & Mineral Resources Survey of Henan|No.2 Institute of Geological & Mineral Resources Survey of Henan
- Unit：
- 摘要
- 在线预览
- 参考文献
摘要:
坦桑尼亚太古界卡维隆多群杂砾岩主要分布于中部的恩泽加地区，少量分布于其西南部的卢帕地区，该岩系在恩泽加地区呈近东西向和北西向展布，长约50 km，宽0.5~3 km，并普遍发育金矿化，其矿化特征主要为硅化和黄铁矿化，其次为毒砂化和磁黄铁矿化。研究成果表明：①激电异常显示出明显相对低阻高极化特征；②土壤地球化学测量结果显示，Au异常规模较大，浓集中心及分带较为明显；③金矿化严格受岩层控制，局限于杂砾岩带内；④金矿化规模大，矿化体宽5~20 m；⑤矿化体金品位较低，为0.2~1.0 g/t，局部富集地段可达到2~3 g/t。
关键词:
坦桑尼亚；恩泽加；卡维隆多群；杂砾岩；金矿化；太古界
Abstract:
The Tanzania Archaean Kavirondian Group conglomerates are primarily distributed in the Nzega region of central Tanzania,with a small amount also found in the Lupa region to the southwest.This rock formation,which extends approximately 50 km in length and 0.5-3 km in width in a near EW and NW direction,is characterized by widespread gold mineralization.The main mineralization features include silicification and pyrite mineralization,followed by arsenopyrite mineralization and pyrrhotite mineralization.The study findings are as follows:①Induced polarization anomalies exhibit distinct relatively low resistivity and high polarization characteristics.②Soil geochemical measurements show significant Au anomalies with well-defined concentration centers and zones.③Gold mineralization is strictly controlled by rock layers and is confined to the conglomerate zones.④The gold mineralization is extensive,with mineralized bodies ranging from 5 m to 20 m in width.⑤The gold grades within the mineralized bodies are relatively low,ranging from 0.2 g/t to 1.0 g/t,but local enrichment zones can reach 2 g/t to 3 g/t.
Keywords:
Tanzania;Nzega;Kavirondian Group;conglomerates;gold mineralization;Archaean
