The Kis-Kuel Fe-Cu-Au±(Ag, Mo, Bi) deposit, Eastern Yakutia (Russia) – a link between Iron Oxide Copper-Gold and Intrusion Related Gold systems
DOI:
https://doi.org/10.21638/spbu07.2019.401Abstract
The Iron Oxide Copper-Gold (IOCG) deposit class includes a number of loosely related deposits with a pool of common characteristics. The Kis-Kuel intrusion-related IOCG deposit in Eastern Yakutia (Russia) with a wide range of mineral styles has a direct genetic link with a cooling intrusion during its formation. The IOCG and the Kis-Kuel have common features for this style - the abundance of iron oxides and low of sulfides. Magmatic contribution to the Kis-Kuel deposit is significant. Intrusive rocks range from diorite to granodiorite in composition. Rare-earth geochemical system of igneous rocks of the Kis-Kuel intrusive is characterized by behavior close to the CHArge-and-RAdius-Controlled CHARAC-system (26<Zr/Hf<46 и 24<Y/Ho<34) in which the Н/Ho – Zr/Hf ratios of the pair show a distribution close to chondrite (Zr/Hf – 36.6 and Y/Ho – 27.7). Minor deviations of the Kis-Kuel rocks from the CHARAC intervals indicate a unevolved magmatic system. Mineralization was discovered at the top of small Kis-Kuel pluton and includes several types of ore. Iron Oxide Copper-Gold and Cu-Au-porphyry ore breccia in hornfelsed aureole of intrusive grades FeOX – 13.58-63.24%; Cu – 0-3.57%; Au – 12.93-64.48 g/t; Ag – 2.7-830 g/t. Associated with IOCG, quartz-hematite-galena veins grade Ag – 22.4-3680 g/t; Cu – 0.014-0.534%; Pb – 0.1-81.63%. Arrays of sheeted auriferous quartz veins with arsenopyrite, native gold and bismuth and Ag-Bi sulphosalts grade: Au – 0.15-4.6 g/t; Ag – 20.6-196 g/t; Cu – 0.048-0.24%; Pb – 0.3-3.73%. This paper is devoted to a Kis-Kuel diorite-granodiorite related deposit in the Eastern Yakutia (Russia). It is regarded as Intrusion Related Gold Deposit (IRGD) with a main IOCG and minor Cu-Au-porphyry component of mineralization.
Keywords:
Eastern Yakutia, Kis-Kuel ore cluster, Iron Oxide Copper-Gold deposit, intrusion-related, gold prospecting
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Articles of "Vestnik of Saint Petersburg University. Earth Sciences" are open access distributed under the terms of the License Agreement with Saint Petersburg State University, which permits to the authors unrestricted distribution and self-archiving free of charge.