Gold mineralization in moderate to highly quartz-sulphide veined, brecciated and fractured micaschist, adjacent to a phyllic-altered rhyolite dome. The principal prospective mineralization is hosted in micaschist and is occurring in an at least 10 m wide, NE-trending fault zone with an average grade of 5.3 g/t Au. Within the high-grade zone, there are lenses of >20 g/t Au over widths of 1-3 m. The distinct linear high-grade zone is enveloped by a pervasive but comparatively lower-grade quartz stockwork system in sericite-quartz-limonite altered micaschist. The Au grades in the stockworked envelope is generally 0.1 to 0.5 g/t Au with narrow, 2-3 m wide zones of higher-grade gold mineralization (4-5 g/t Au).
Epithermal gold deposit, related to a Late Paleozoic granite porphyry intruded into an ophiolitic melange belt.
References
- Guiqin Wang, Wang Chen, Xianrong Luo, Xiaolu Zhang, and Jianbo Du (2002): Physicochemical exploration for gold deposit in Bayanhar, Inner Mongolia. Gold Geology 21(3), 60-64.
- Hongchen Zhu, Haipo Wang, and Jiongfei Zhang (2006): Two Genetic Types of Gold Deposits in Sonid Zuoqi, Inner Mongolia. Journal of Jilin University, Earth Science Edition 51(5), 759-766.
- Gangzhu Li, Yuanqin Jia, Biao Zhang, Kena Chen, and Peiqing Hu (2008): Metallogenic Process of the Baiyinhaer gold deposit. Gold Science & Technology 16(3), 6-12.
External Links
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http://www.apacminerals.com/press/index.cfm?SiteID=1012&ToolID=1025&ContentID=142692&Func=doc [Link Broken? Nov 2011]
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http://www.apacminerals.com/press/index.cfm?SiteID=1012&ToolID=1025&ContentID=138853&Func=doc [Link Broken? Nov 2011]
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