Temporal and spatial variability of Au-Sb-W mineralization in the Verkhne-Yenashinskoye Ore Cluster (Yenisei Ridge, Siberia)
- Postgraduate student G.V. Plekhanov Saint Petersburg State Mining Institute
Abstract
Multistage Au-Sb-W mineralization of the Verkhne-Yenashinskoye ore cluster is found in deposits and ore occurrences of endocontact granitoids (Vysokoye-2) near-exocontact (Olenye, Innokentievskoye) and far-exocontact (Olimpiada). There are five stages of ore mineralization (from early to late): quartz-wolframite-sulfide with quartz-wolframite and scheelite-sulfide mineral associations, gold-sulfide with scheelite-pyrrhotite and gold-arsenopyrite associations, polymetallic with sphalerite-chalcopyrite-pyrrhotite and ulmanite-pyrite associations, gold-sulfoantimonite with pyrrhotite-bertierite, gold-goodmundite-anshmo-nite and association of native elements; postdepositional carbonate, The arsenopyrite geothermometer determined the possible temperatures of arsenopyrite formation of different generations HV: 430±50, 335±60, 395+90, and less than 280°C. Mineralogical zoning of the knot, which consists in the change of high-temperature mineralization of early stages to low-temperature late stages as the distance from the granitoid intrusion is revealed. The presence of cobalt, nickel and mercury minerals in the polymetallic stage at the Olympiad deposit is due to its confinement to the junction of ore-controlling faults with the zone of the deep regional Tatarsky fault.
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