Field: "Amanak"

Location: Russian Federation , Republic of Buryatia, Muisky and Bauntovsky Evenki districts

Area: 49.0 km²

Minerals: Gold from primary (ore) deposits, jade

Reserves: no information

The subsoil site "Amanak" is located on the left bank of the Tsipa river in its middle course, 135 km north-east of the regional center with. Bagdarin.

The main orographic units of the region are the Babanty Mountains, the Olingda Depression and the eastern part of the Tsipa Depression.

Within the Licensed area, the relief is high-mountainous, steep-sloping, sharply dissected with a predominance of factors of erosion, glacial gouging, frost weathering (absolute marks - 1600-2491 m).

The main waterway is r. Tsipa (Vitim tributary) is suitable for the movement of light boats from the Uyu meteorological station to the Bount settlement. The rest of the streams are typically mountainous, with Y-shaped valleys in the upper reaches and trough-shaped ones in the lower reaches. In winter they freeze to the bottom. In the valleys of the Talikit, Amnunna (Tsipinskaya) rivers, ice up to three meters thick is formed in winter, which finally melt in early July.

The climate of the region is sharply continental. Winter is long and usually with little snow. Summer is short and hot. The minimum temperatures in January are up to -40 ° -50 °, the maximum in July is up to + 30 °. Annual precipitation is 400-430 mm, maximum rainfall occurs in July-August. The snow cover melts in mid to late June and appears in August and early September. Permafrost is widely developed. The active layer is 1-1.5 m. Freeze-up on rivers and lakes begins at the end of September-first half of October, ice drift - in May-June.

Communication routes on the work area are poorly developed. Along the large rivers there are trails where there are isolated hunting winter quarters. In the summer, communication with the subsoil area is possible only by tracked all-terrain vehicles and a helicopter. In winter time - on the auto-winter road by off-road vehicles.

The regional center Bagdarin is connected with the cities of Ulan-Ude and Chita by class III motorways with a length of 330 and 602 km, respectively.

As of 03.12.2019 within the Licensed Area:

- there are no other mineral deposits, specially protected natural areas of federal and territorial significance, ancestral lands of indigenous peoples, restrictions of the General Staff of the Russian Armed Forces;

- geological exploration is not carried out at the expense of the federal budget and funds of the constituent entity of the Federation.

Geological characteristics of the subsoil area, indicating the presence of deposits (deposits) of minerals and reserves (resources) for them:

The license area is located in the southern part of the Zoltui potential ore cluster (PRU), allocated in the northeastern part of the Kudur-Talikit ore region (RR).

Gold mineralization in the area is associated with quartz veins, quartz metasomatized and zones of quartz veinlets. Quartz-veined gold ore

mineralization is confined to granitoids, quartz-metasomatic, and zones of quartz veinlets of the stockwork-like type - to the rocks of the protocell.

Significant vein ore occurrences of gold in granitoids are located near the contacts of granites with rocks, either deeply metamorphosed (Zoltuiskoe) or less metamorphosed (Bira).

The most significant gold mineralization was found in the rocks of the protochekhla (the Verkhne-Gankinskoe ore occurrence - in effusive-sedimentary and the Chuldim ore occurrence - in carbonate rocks).

Zoltuysky PRU covers the watershed area of ​​the Talikit-Amnunna (Bambuiskaya) - Amnunna (Tsipikanskaya) - Amanak rivers. In plan it has an oval shape, elongated in the submeridional direction, with an area of ​​~ 260 km2. The PRU is confined to the Zoltui horst uplift, framed by powerful sublatitudinal faults (Pribambuysky fault) and submeridional striking faults feathering them (Talikit fault).

The PRU is located in the development field of granitoids of the Mui intrusive complex, containing small xenoliths of the Bamboo Formation (RK1) rocks in the central and southern parts of the area. In the southern part of the PRU, the above formations are cut through by granitoids of the Vitimkan complex (P21). Fields of development of felsic, intermediate and basic dikes are observed, attributed to conditionally Mesozoic small intrusions.

The existence of a tense tectonic setting within the PRU contributed to the widespread development of hydrothermal development of rocks - silicification, beresitization, sulfidization, hematitization and the formation of a number of gold ore occurrences, dispersion halos, and mineralized points of gold. There are powerful zones of mylonitization, epigenetically altered rocks.

Within the Zoltuyskoye PRU there are two PRPs: Zoltuyskoye and Perevalnoye, located to the north of the Licensed area.

During GS-50, the predecessors searched for areas of gold mineralization: the Zoltui site, the occurrence of gold in the upper reaches of the Amnunna (Bambuiskaya), as well as the occurrence of the Perevalny area (Nikitin, 1983). Inferred resources of the Zoltuysky ore field are estimated according to cat. Р2 in the amount of 20 tons and approved by TsNIGRI (protocol No. 7 of 27.03.2012).

Within the boundaries of the Licensed Area, numerous pinpoint occurrences of gold mineralization were identified, characterized by single samples. In the overwhelming majority of cases, these manifestations are represented by sulfide-quartz veins, with a thickness of 0.2 to 1.0 m and a length of 30-120 m, as well as areas of quartz veinlets.

Ore mineralization in disseminated veins and veins; represented by pyrite, hematite, less often galena and sphalerite.

Most of these manifestations are localized in zones of northeastern strike faults. The maximum gold content in them is 0.6-9.2 g / t. All occurrences have not been explored and are described as points of mineralization (Nikitin, 1983; Pozdnyakova, 2008).

As of 01.01.2019, within the boundaries of the Licensed Site, there are no reserves accounted for by the State Balance of Mineral Resources, as well as predicted resources (categories P2, P3) of minerals.

An overview of the work carried out earlier at the subsoil site:

In 1961, a state geological survey of a scale of 1: 200,000 was started on sheet N-50-1. The work was carried out by the Verkhne-Bambuiskaya party of the Central Geological Survey Expedition of the Buryat Geological Department. In 1963, the Party completed the survey of the southeastern part of the leaf, within which the main part of the Licensed area is located (Zaitsev, 1965).

In 1980, she began prospecting and survey work at a scale of 1: 50,000 on sheets N-50-14-6, N-50-14-6 and on the northeastern segment of sheet N-50-14-3. "Buryatgeology". The work was completed in 1982 (Nikitin, 1983).

Information on the extracted minerals for the period of use of the subsoil plot: according to the information reflected in the State Balance of Reserves as of 01.01.2019, no mining operations were carried out at the Licensed Subsoil.

Technical and economic indicators of research and exploration work at the subsoil site:

Estimated costs for research, appraisal and geological exploration work with the involvement of contractors amount to up to 50 million rubles. These works can be completed within two years.

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