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Geoscience ›› 2022, Vol. 36 ›› Issue (06): 1525-1537.DOI: 10.19657/j.geoscience.1000-8527.2022.06.08

• Geochemistry • Previous Articles     Next Articles

Ore Prospecting Effect of Cuttage Survey in Weak Anomaly Area of Stream Sediment Survey in Beishan, Gansu Province:Taking the Discovery of Heishannan Gold Mine in Yanchi as An Example

LIU Yongbiao(), LI Shengye(), ZHAO Jichang, FAN Xinxiang, YANG Zhenxi, CHEN Haiyun   

  1. Fourth Institute of Geological and Mineral Exploration of Gansu Provincial Bureau of Geology and Mineral Resources, Jiuquan, Gansu 735000, China
  • Received:2021-03-31 Revised:2021-09-03 Online:2022-12-10 Published:2023-01-11
  • Contact: LI Shengye

Abstract:

The geochemical landscape of the study area belongs to the Gobi remnant mountain area of the arid desert in Beishan, Gansu, and several gold-weak anomalies were delineated in the area of Yanchi Heishan in Beishan by 1∶25 000 water system sediment measurement. In order to highlight the geochemical anomaly chara-cteristics of mineralization and indicator elements and improve the prospecting effect, 1∶10 000 cuttings measu-rement was carried out to achieve target area optimization of the gold weak anomaly of stream sediments, the characteristics of element combination are analyzed and summarized by correlation and R-type cluster analysis, and single element anomalies and comprehensive anomalies are circled. Two comprehensive anomalies with good metallogenic prospects are verified by means of reconnaissance and recourse, large-scale geological mapping and exploration troughs, and Heishannan gold mine in Yanchi is discovered, prospecting breakthrough in the weak anomaly area of the sediment of the stream system was achieved, which fully confirms the effectiveness of cuttings survey in geological prospecting in the arid desert Gobi remnant mountain area of Beishan river system in Gansu Province, and provides a new way for prospecting in the weak anomaly area of sediment survey in Bei-shan river system.

Key words: geochemical exploration, debris geochemical survey, weak anomalous area of river system, gold deposit, Beishan, Gansu

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