Journal of Jilin University(Earth Science Edition) ›› 2019, Vol. 49 ›› Issue (4): 992-1000.doi: 10.13278/j.cnki.jjuese.20180052

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Chemical Phase of Au in Rock/Ore and Significance of Yangshan Gold Deposit, Gansu Province

Lu Jilong1, Fan Yuchao1, Xiong Yuxin2, Yin Yechang1, Zhao Yuyan1   

  1. 1. College of GeoExploration Science and Technology of Jilin University, Changchun 130026, China;
    2. Shandong Institute of Geological Sciences, Jinan 250013, China
  • Received:2018-03-12 Online:2019-07-26 Published:2019-07-26
  • Supported by:
    Supported by National Key R & D Program of China(2016YFC0600606) and National Special Research Fund for Non-Profit Sector (201311171-2)

Abstract: We used graphite furnace atomic absorption section spectroscope to determine the content of five gold chemical phases (soluble phase, free natural gold, carbonate phase, sulfide phase, and silicate phase) in the ores and rocks of the Yangshan Carlin-like deposit in Gansu Province, and identified their distributions in different rocks/ores. According to the results, the major phase in rocks is silicate phase which accounts for 57.6%. In ores, sulfide phase accounts for 56.9%,the highest proportion among the five phases. The proportions of free natural gold, carbonate phase and sulfide phase in ores are much higher than those in rocks. Soluble phase, free natural gold, carbonate phase and sulfide phase are favorable metallogenic phases. The proportions of favorable metallogenic phases in the host strata are obviously higher than those in other strata. This can be used to infer the metallogenic potential of strata and provide a reference for the evaluation of petro-geochemical anomalies.

Key words: carlin-like deposit, chemical phase analysis, gold, sulfide phase, Yangshan deposit

CLC Number: 

  • P618.51
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