1. Institute of Geophysical and Geochemical Exploration, CAGS, Langfang 065000, China 2. Key Laboratory for Geochemical Exploration Technology, MLR, Langfang 065000, China
In this study, soil samples before and after geo-electrochemical extraction were collected along the fifth exploration line of the Luokedun lead-zinc polymetallic mining area. Total content and chemical speciation of 'seven steps method' were analyzed for 20 elements. Some conclusions have been reached: Elements extracted by geo-electrochemical process exist in a variety of phases in soil. The active phases including water soluble, exchangeable and carbonate bound phases are the mainly components, while micro-particles that exist in low active phases including residues can also be migrated and adsorbed by this process. Spatial distribution of element values of some active phases in soil appear to be highly consistent with spatial position of the orebody after geo-electrochemical extraction. Factors such as low depth transported overburden and orebody or mineralized body beneath the cover can lead to a significant increase of total content in soil for the majority of metal elements after the extraction process. Such phenomena indicate that the method of geo-electrochemistry has great applicability in the transported overburden area.
孙彬彬, 曾道明, 刘占元, 周国华, 贺灵. 风成砂覆盖区地电化学提取前后土壤中元素赋存状态变化研究[J]. 物探与化探, 2018, 42(3): 518-527.
Bin-Bin SUN, Dao-Ming ZENG, Zhan-Yuan LIU, Guo-Hua ZHOU, Ling HE. Variation of modes of occurrence of elements in soil before and after the geo-electrochemical extraction in eolian sand covered area. Geophysical and Geochemical Exploration, 2018, 42(3): 518-527.
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doi: 10.1021/ac50043a017
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