THREE-COMPONENT MAGNETIC SURVEY IN THE BOREHOLE OF XIAOSHUIGOU IRON POLYMETALLIC DEPOSIT, QINGHAI PROVINCE
ZHANG Shi-long1, KANG Wei-hao2,3, REN Er-feng2,3, YU Xiao-liang4, XUE Chang-jun1, YUAN Ke-quan1, CAI Cheng-long1
1. No. 7 Geological Team, Qinghai Bureau of Geological Exploration for Nonferrous Metals, Xining 810007, China; 2. Department of Geological Engineering, Qinghai University, Xining 810016, China; 3. Key Laboratory of Cenozoic Resources and Environment on the Northern Margin of Qinghai-Tibet Plateau, Xining 810016, China; 4. Qinghai Bureau of Geological Survey, Xining 810001, China
Abstract：For efficient and direct prospecting for concealed orebodies beneath and near the exploratory well of iron polymetallic orefield in Xiaoshuigou area, Qinghai Province, the method of three-component magnetic survey in borehole is applied to study the logging data of ΔZ and ΔH' curves and change rules of ΔT' vector. It can scientifically reduce the borehole number, guide the drilling direction, accurately predict the concealed orebody around the drilling hole, and effectively improve the percentage of ore discovery.