Nevsko-Pestrinskoye

Location and infrastructure

The Nevsko-Pestrinskoye license area is located in the Omsukchan district of the Magadan Region. Nevsko-Pestrinskoye is partially located on the road that connects Magadan with Omsukchan. Omsukchan is the district capital and a major mining town. The topography of the license area is marked by steep hills, which makes parts of Nevsko-Pestrinskoye difficult to access despite nearby road infrastructure. There is a main power line that runs the length of the road connecting Magadan to Omsukchan.

Geology

Nevsko-Pestrinskoye is located at the crossing of the Okhotsko-Chukotsky Volcanogenic Belt and the Balygychan-Sugoysky trough. At this crossing is a silver and base metals mineralized zone known as the Pestrinsky district, which covers approximately 640 square kilometers. The Pestrinsky district is the Southern flank of the Dukat region, which hosts such silver-gold deposits as Dukat, Lunnoye and Arylakh. Within the Pestrinsky district is the Goltsovoye silver deposit, which covers an area of 13 square kilometers (not part of the Nevsko-Pestrinskoye license). The Goltsovoye deposit can be classified as a silver–polymetallic vein formation, typical of low to middle temperature hydrothermal mineralisation. Goltsovoye is localised within a late Cretaceous Vulcanite zone of the upper structural complex adjacent to the main Verkhne-Tapsky strike fault. The main mineralised faults in the Pestrinsky district are interpreted to be structures of the regional Verkhne-Tapsky fault zone. In general they occur as zones of intensely crushed mylonitised rock with fault gouge accompanied by a zone of schistosity with superimposed vein-veinlet-disseminated sulphide mineralisation and intense sericite-quartz (argillic) alteration characteristic of tectonically disturbed rock. While Goltsovoye is not part of the Nevsko-Pestrinskoye license area, the mineralology of the deposit is believed by Ovoca to extend beyond Goltsovoye’s 5.76 square kilometres area.