Magnetic and Induced Polarization Anomaly Characteristics of a Gold Ore Deposit in Tanzania

详细信息   

• 责任者：Li Shuiping (No.2 Geological Party ; Henan Bureau of Geology and Mineral Exploration ; Jiaozuo 454002 ; China) ; Bai Desheng
• 刊名：Geophysical and Geochemical Exploration
• 出版年：2012
• 卷期：36(5)
• 关键词：金矿 ; gold ores ; 磁法勘探 ; magnetic prospecting ; 激发极化测深 ; induced polarization sounding ; 坦桑尼亚 ; Tanzania
• 页码：p.737-740
• 图表：7 illus., 2 tables, 9 refs.
• 分类号：1600
• issnNo：ISSN1000-8918
• isbnNo：CN11-1906/P

摘要

The studied gold deposit in Tanzania is a concealed ore deposit associated with BIF. In order to find out the distribution of the gold ore veins, the authors conducted ground high precision magnetic survey. The results show that the AT anomalies are mainly negative anomalies, whose peak value is higher than that of positive anomalies, which seem to be associated anomalies. The anomalies basically reflect the extension of BIF in plane and characteristics of the structure. The induced polarization depth measurement along the section shows that the contour lines of apparent resistivity are concave whereas the contour lines of apparent polarizability are con- vex, respectively reflecting the position of structure along the section and the features of BIF. The magnetic force and induced polariza- tion anomaly in this area display obviously the concealed feature of BIF, and the bed of interest is intersected by drilling. The results are valuable in the deployment of drill holes.