AN ORE DISCOVERY EXAMPLE OF DEEP PROSPECTING
BY HELICOPTER AEROMAGNETIC SURVEY IN THE DAYE IRON MINE
YU Changchun 1, XIONG Shengqing 1, LIU Shiyi 2, FAN Zhengguo 1, SUI Suwen 1
1. China Aero Geophysical Survey and Remote Sensing Center for Land and Resources, Beijing100083, China;2. Development Research Center of China Geological Survey, Beijing100037, China
Aeromagnetic survey using helicopter with a fixed receiver is suitable for ore prospecting in local key areas, because the survey method has a low flying height of 100 m, a small sampling interval of about 3 m, a high locating precision of less than 1 m, and a low cost of about 30% of the expense of ground magnetic survey. In this paper, the orecaused anomaly was determined by a comparative analysis of the ore body thickness and the aeromagnetic anomaly and a mutual verification of the forward and inversion calculations. The borehole site was determined by precise inversion of the aeromagnetic anomaly. The effectiveness of the method is verified by the fact that iron ore bodies were discovered in all the three borehole sites deployed by the authors at the depth of the Daye iron mine.
于长春, 熊盛青, 刘士毅, 范正国, 眭素文. 直升机航磁方法在大冶铁矿区深部找矿中的见矿实例[J]. 物探与化探, 2010, 34(4): 435-439.
YU Chang-Chun, XIONG Sheng-Qing, LIU Shi-Yi, FAN Zheng-Guo, SUI Su-Wen. AN ORE DISCOVERY EXAMPLE OF DEEP PROSPECTING
BY HELICOPTER AEROMAGNETIC SURVEY IN THE DAYE IRON MINE. Geophysical and Geochemical Exploration, 2010, 34(4): 435-439.