A study of geoelectrochemistry in search for concealed copper-nickel deposits in Hejiaya area, Lueyang County, Shaanxi Province
Wang HE1, Xian-Rong LUO1(), Fei OUYANG1, Pan-Feng LIU1, Yi-Huai SU1, Wen-Bin HUANG1, Dong WANG1, Jun YOU2, Xiao-Ming ZHANG2
1. Institute of Concealed Mine Prospecting, College of Earth Science,Guilin University of Technology, Guilin 541004, China 2. Shaanxi Institute of Geological Survey,Xi'an 710068, China
In this paper, geoelectrochemistry was used to carry out feasibility study above nickel deposits in Hejiaya area, Lueyang, Shaanxi Province. The results were compared with results obtained by traditional soil geochemical measurement methods. The results show that geoelectrochemistry and soil geochemical measurements above nickel deposit profiles show anomalies, but the soil geochemical anomalies are not good in content and morphology. It is inferred that the topography and epigenesis may influence the distribution of anomalies, which makes the distribution of anomalies slightly disordered and the clarity of anomalies reduced. Compared with soil geochemical anomalies, geoelectrochemical anomalies show a good correspondence above the ore site, and the anomalies show a steep double-peak or three-peak pattern. In order to further study the distribution characteristics of anomalies on the plane, the authors analyzed the element content of the two methods. It is found that geoelectrochemical method can strengthen anomalies to a certain extent, magnify the anomaly effect and easily summarize the law of element dispersion and enrichment. On such a basis and in combination with the results of geological and geophysical exploration, two favorable prospecting targets were delineated by geoelectrochemistry in the study area, which indicate the existence of concealed orebodies in its deep part, but this conclusion needs to be verified by engineering.
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