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APPLICATION OF COMPREHENSIVE GEOPHYSICAL PROSPECTING METHODS IN EXPLORATION OF LITHIUM-BERYLLIUM RARE METAL AND RARE EARTH ORES |
BAO Shan-dong, ZENG Biao, BAI Zong-hai, HUANG Qing-hua, YUAN Yong-tao, QI Wen, XIONG Shou-jia |
Qinghai Key Laboratory of Geological Processes and Mineral Resources in Northern Qinghai-Tibetan Plateau/Qinghai Geological Survey Institute, Xining 810012, China |
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Abstract The correlation between content assemblage of radionuclides in ores and ore content of rock is analyzed to guide the exploration of lithium-beryllium rare earth ore resources. The granite pegmatite dikes in Chakabeishan area are measured for magnetic and radioactive characteristics by using ENVI Pro proton magnetometer and ARD multichannel gamma-ray spectrometer, to determine the content distribution rule and anomaly location of 238U, 232Th and 40K, delineate ore-bearing rock bodies, extract information and analyze the correlation between magnetic anomaly and radioactive element content. The results show that the background field with high U, Th and K in the north anomaly area is mainly controlled by epimetamorphic rocks originated from sedimentary rocks. In the middle and southern anomaly areas, the area near the joint of two veins and contact zone where the magnetic anomalies overlap U-Th mixed anomalies have the greatest potential for rare metal and rare earth ores exploration, reflecting that the correlation analysis of magnetic survey and energy spectrum measurement can provide a good geophysical basis for future prospecting.
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Received: 04 January 2021
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