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地学领域高质量科技期刊分级T2区（2023）

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Volume 42 Issue 1
Jan.  2023
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Article Navigation >  Bulletin of Geological Science and Technology  > 2023  >  42(1): 324-338
Huang Xiaokun, Wei Junhao, Shi Wenjie, Zhang Xinming, Gao Qiang, Wang Shuang. Identification of the geochemical anomalies using the catchment basin analysis: A case study of 1∶50000 geochemical survey of stream sediments in Wulasitai region, East Kunlun Orogenic Belt[J]. Bulletin of Geological Science and Technology, 2023, 42(1): 324-338. doi: 10.19509/j.cnki.dzkq.2021.0093
Citation: Huang Xiaokun, Wei Junhao, Shi Wenjie, Zhang Xinming, Gao Qiang, Wang Shuang. Identification of the geochemical anomalies using the catchment basin analysis: A case study of 1∶50000 geochemical survey of stream sediments in Wulasitai region, East Kunlun Orogenic Belt[J]. Bulletin of Geological Science and Technology, 2023, 42(1): 324-338. doi: 10.19509/j.cnki.dzkq.2021.0093
shu

Identification of the geochemical anomalies using the catchment basin analysis: A case study of 1∶50000 geochemical survey of stream sediments in Wulasitai region, East Kunlun Orogenic Belt

doi: 10.19509/j.cnki.dzkq.2021.0093

  • School of Earth Resources, China University of Geosciences(Wuhan), Wuhan 430074, China

  • Received Date: 31 May 2021
    Abstract

  • Geochemical survey of stream sediments is an effective technology for mineral prospecting. The extraction of geochemical anomalies in stream sediments based on catchment basins has always been one of the research hotspots.The catchment basin analysis method is proposed based on Sample Catchment Basin Analysis (SCBA)in this paper, and it is used to identify geochemical anomalies in the Wulasitai region, East Kunlun Orogenic Belt in Qinghai Province.Catchment basins are divided by a high-precision DEM, and the Au, Ag, and Pb factor loadings of 1∶50000 stream sediments are measured by the catchment basin analysis. During the extraction process, a variety of geomorphic parameters such as main stream slope, relief ratio, catchment basin area, are used as the sediment delivery ratios for residual correction calculation, and the geochemical background and anomalies are separated by the C-A fractal modeling. The anomaly extraction results show that the area of the catchment basin is the most suitable parameter as the sediment delivery ratio to participate in the downstream attenuation correction. The catchment basin method can effectively identify and extract geochemical anomaly information.Anomalies correspond well to the spatial location of ore deposits, and can provide beneficial information for the next step of mineral prospecting.

     

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