Process Mineralogy of Gold Ore in Zaozigou Gold Mine， Gansu Province

doi:10.12068/j.issn.1005-3026.2017.05.021

Abstract

Abstract:

The samples collected from Zaozigou gold mine in Gansu Province can be considered as typical Carlin-type gold deposits. The Au， Sb， and As contents of the ore are 4.09g/t， 0.46% and 0.39 %， respectively. It was found that the main metallic minerals in the gold ore are pyrite， arsenopyrite， stibnite and limonite. The primary gangue minerals are quartz， carbonate minerals and sericite. Mineral composition of the ore is complex， however， gold and antimony are the only useful minerals. The gold minerals in the ore are mainly native gold with the relative content of 99.12%. In addition to gold distributed in the gangue minerals， stibnite is an important carrier of gold. Particle size of native gold is tiny less than 0.075mm and nonuniform. According to the process mineralogy research， the main reasons for the refractory of the ore are the easily argillaceous minerals， inclusion gold and containing huge amounts of minerals consuming cyanide such as arsenic antimony matter.

Key words: Zaozigou gold ores, Carlin-type gold ores, process mineralogy, occurrence state, dissemination characteristics

CLC Number:

TD912

DONG Zai-zheng， GAO Peng， ZHANG Shu-min， HAN Yue-xin. Process Mineralogy of Gold Ore in Zaozigou Gold Mine， Gansu Province[J]. Journal of Northeastern University:Natural Science, 2017, 38(5): 711-715.

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