Characteristics of Mineral Association and Mechanism of Au Precipitation in the Zhaishang Gold Deposit, Southern Gansu Province

• 责任者：Liu Jiajun (State Key Laboratory of Geological Processes and Mineral Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Mao Guangjian
• 刊名：Geology in China
• 出版年：2010
• 卷期：37(2)
• 关键词：金矿 ; gold ores ; 矿石矿物 ; ore minerals ; 甘肃 ; Gansu Province
• 页码：p.453-462
• 图表：3 illus., 3 tables, 16 refs.
• 分类号：1001
• issnNo：ISSN1000-3657
• isbnNo：CN11-1167/P

Located in the western part of the Minxian County-Lixian County metallogenic belt, West Qinling Mountains, the Zhaishang gold deposit is a recently discovered large-sized Carlin-type disseminated gold deposit. Examination of ores by optical microscope, electron microprobe and X-ray surface scanning has revealed that the ore deposit is quite complex in mineralogy. Dissolution of ferruginous limestone in the host rocks and sulfidation of the dissolved iron by H₂S introduced by ore fluids were not only the most important depositional mechanism for visible gold grains but also the advantageous conditions for gold enrichment in the Zhaishang gold deposit.