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Geoscience ›› 2018, Vol. 32 ›› Issue (05): 1042-1052.DOI: 10.19657/j.geoscience.1000-8527.2018.05.17

• Applied Geochemistry • Previous Articles     Next Articles

Regional Geochemical Characteristics of Metallogenic Elements in Northwest China

ZHANG Jing(), YANG Bo, LI Baoqiang, LI Huiying   

  1. Xi’an Center of Geological Survey,China Geological Survey, Xi’an, Shaanxi 710054,China
  • Received:2018-05-23 Revised:2018-08-15 Online:2018-10-10 Published:2018-11-04

Abstract:

Based on 322,000 regional geochemical data of Shaanxi, Gansu, Ningxia, Qinghai and Xinjiang in Northwest China, a series of geochemical maps have been compiled and geochemical anomaly genealogy in Northwest China has also been established by statistical analysis, spatial analysis and expert analysis. The enrichment degree of W, Sn, Mo, Cu, Pb, Zn, Au, Ag and Ni in each geochemical region have been calculated, by which the geochemical region have been sorted, then the anomalous significance of W, Sn, Mo, Cu, Pb, Zn, Au, Ag and Ni in each geochemical region and sub-region have been calculated. Based on the result of calculation,the geochemical region and sub-regions has been sorted. The results show that Qinling geochemical region and Xiaoqinling geochemical sub-region are the geochemical regions and sub-regions with the highest anomaly significance, respectively. In Xiaoqinling geochemical sub-region, the anomaly significance index of Mo is the highest and the anomaly scale is the biggest; the anomaly significance index of Au is the second.

Key words: Northwest China, geochemical zonation, anomaly dimension, geochemical landscape, geochemical anomaly characteristic

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