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WANG Zhanbin, MA Cheng, YANG Ke, ZHANG Xiaoxing, LIU Ji, KOU Shaolei, TIAN Yuan. 2022. The Concept and Application of Element Equivalent-concentrating: A Case Study for Anomaly Interpretation of Soil Survey from Zhongba Mining Area, Ningqiang County, Shaanxi Province. Northwestern Geology, 55(2): 271-283. doi: 10.19751/j.cnki.61-1149/p.2022.02.024
Citation: WANG Zhanbin, MA Cheng, YANG Ke, ZHANG Xiaoxing, LIU Ji, KOU Shaolei, TIAN Yuan. 2022. The Concept and Application of Element Equivalent-concentrating: A Case Study for Anomaly Interpretation of Soil Survey from Zhongba Mining Area, Ningqiang County, Shaanxi Province. Northwestern Geology, 55(2): 271-283. doi: 10.19751/j.cnki.61-1149/p.2022.02.024
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The Concept and Application of Element Equivalent-concentrating: A Case Study for Anomaly Interpretation of Soil Survey from Zhongba Mining Area, Ningqiang County, Shaanxi Province

  • Xi'an Mineral Resources Investigation Center, CGS, Xi'an 710000, Shaanxi, China

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Received Date:  26 November 2021
Revised Date:  30 January 2022
    Abstract
  • Mineral resources are a kind of special geological body highly enriched in useful elements. In order to facilitate the comparative study of the enrichment and dispersion laws of various elements in the process of mineralization, the author proposed the concept of equivalent-concentrating, which equally divided the concentration process of each element from the Clark value to the boundary grade of the ore body, so that the enrichment degree of different elements is quantitatively comparable, that is, each element has the same enrichment degree and metallogenic potential at the same equivalent-concentrating level. This method was applied to the Zhongba mining area in the Back-Longmenshan orogenic belt on the northern margin of Yangtze plate, and achieved good results. Through the element equivalent-concentrating histogram, it can be known that the main ore-forming elements in the Zhongba mining area are Au, Ag, Mo, the ore-forming associated elements are Cu, Zn, and the indicator elements are As, Sb, Pb; the geochemical maps in equivalent-concentrating method can clearly highlight the elemental boundaries of the area, guide the determination of the Silurian and Cambrian stratigraphic boundaries in the area, and it is found that Au has a higher degree of concentration than other elements; The anomalies are delineated such as Au, Cu, Mo, etc. and the Xinjiazui gold mine was found in the grade 7 gold anomaly area. Practice shows that it is simple and practical to apply the principle of element equivalent-concentrating to study the elements distribution and the law of enrichment dispersion.
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