• 责任者：Wang Fenggang (Geological Institute ; Shougang Geological Prospecting Bureau ; Beijing 100141 ; China) ; Li Wencheng
• 刊名：Contributions to Geology and Mineral Resources Research
• 出版年：2013
• 卷期：28(4)
• 关键词：铁矿 ; iron ores ; 可控源音频大地电磁法 ; controlled-source audio magnetotelluric methods ; 河北 ; Hebei Province
• 页码：p.604-612
• 图表：10 illus., 4 tables, 5 refs.
• 分类号：1600
• issnNo：ISSN1001-1412
• isbnNo：CN12-1131/P

     Based on lest of MT method along profile over the known iron ore body, results of three drill holes which intersect （）re, and comparison and analysis of influence of electric dipole artificial field source on observation data it is pointed out that although the measurement points are laid out in the working area and data collected are seriously disturbed by human noise the anomaly morphology at some frequency bands of the earth electromagnetic profile sounding data collected on basis of the aeromagnetic anomaly is similar to that of the proximal-area. The phenomenon is resulted from not considering magnetic permea- bility of the iron ore during data procession with inversion software rather than the proximal-area effect. Feature of the proximal-area at over several thousands of Hertz at 1-demension apparent resistivity and phase curves and several thousand - tens of thousands of ohms of illusion abnormality at 2-demension in- version profile should be the reflection of stronger magnetic rocks and magnetite quartzite. Some magnetic rocks and magnetite quartzite （including magnetite-quartz pyroxenite ） are different in illusion apparent resistivity anomaly intensity and anomaly gradient and can he identified according to electric and magnetic properties of the ores and rocks.