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The application of soil geochemistry survey to prospecting in the Bapiao Dachong gold ore district of eastern Guizhou Province and its effect |
LIU Shan1,2, CHEN Liang1,2, DUAN Xian-Zhe1,2, HU Yang1,2, WANG Zheng-Qing1,2, HAN Shi-Li1,2, MA Qiang1,2 |
1. School of Nuclear Resources Engineering, South China University, Hengyang 421001, China;
2. Cooperative Innovation Center for Nuclear Fuel Cycle Technology & Equipment, Hengyang 421001, China |
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Abstract Through the implementation of 1:5000 soil geochemical survey, the authors determined the indicator elements of Au, Cu, Pb, As and Zn. By choosing the traditional statistical method, the authors calculated the threshold of each element in the soil, i.e., Au is 6×10-9, Cu is 30×10-6, Pb is 40×10-6, Zn is 150×10-6, and As is 50×10-6. On such a basis, a group of valuable geochemical anomaly areas were detected. The prospecting potential of the geochemical anomaly area were analyzed in detail. In combination with favorable ore-controlling factors such as strata, lithology and structure, the authors synthetically evaluated main ore-forming elements and the abnormal element combination, and then selected three prospecting target areas. In No.Ⅰanomaly target zone, Au, As, Cu and Pb have good spatial assembly; M1-M7 gold-bearing quartz vein bodies were detected, and No. I, No. Ⅱorebodies were delineated in No. Ⅲ anomaly target area in the western part, and anomalies of Au, As and Zn are well superimposed upon each other. M11, M12, M13 gold-bearing quartz vein bodies were found, and No. Ⅲ orebody was delineated by verification engineering. Through the drilling and trenching engineering verification of the anomaly, the anomaly locations, sizes and trends were determined, which accord well with the newly found orebodies (ore spots), suggesting that soil geochemical survey is effective in the study area and hence deserves promotion in the neighboring areas.
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Received: 17 October 2014
Published: 10 February 2016
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