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  3. Mineral Resource Data System (MRDS)

Bakyrchik

Producer in Kazakhstan with commodities Gold, Silver
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Commodities
  6. Materials information
  7. Nearby scientific data
  8. Ore body information
  9. Economic information about the deposit and operations
  10. Mining district
  11. Mineral rights holdings
  12. Ownership information
  13. Production statistics
  14. Reserves and resources
  15. Workings at the site
  16. Links to other databases
  17. Bibliographic references
  18. General comments
  19. Reporter information

Geologic information

Identification information

Deposit ID 10134366
MAS/MILS ID 4590000213
Record type Site
Current site name Bakyrchik

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: 81.56714, 49.71453 (WGS84)
Elevation 220
Location accuracy 5000(meters)

Site location context

Political divisions (FIPS codes)

Kazakhstan(country)

Geographic areas

Country
Kazakhstan

Commodities

Commodity Importance
Gold Primary
Silver Secondary

Materials information

Materials Type of material
Arsenopyrite Unknown
Chalcopyrite Unknown
Galena Unknown
Marcasite Unknown
Pyrite Unknown
Pyrrhotite Unknown
Quartz Unknown
Sphalerite Unknown
Stibnite Unknown

Nearby scientific data

Main Entrance (1) 81.56714, 49.71453
ListMap

Economic information

Ore body information

  • Thickness 40M
    Length 3000M
    Width 250M
    Field Value
    MAS Matrix # 1
    MAS Column # 4
    Type of Orebody #1 FISSURE VEIN
    Primary mode of Origin HYDROTHERMAL
    Secondary mode of Origin OXIDATION
    Primary Ore Control FRACTURING
    Secondary Ore Control LITHOLOGY
    Date of Last Modification 920724

Comments on the geologic information

  • ORE IS HOSTED WITHIN A SERIES OF PALEOZOIC TERRIGENE-SE- DIMENTARY ROCKS OF LOWER TO INTERMEDIATE-AGE MISSISSIPIAN TO PENNSYLVANIAN SANDSTONES,CONGLOMERATES, AND COAL-CLAY SILT- STONES. GOLD ZONES HAVE BEEN HYDROTHERMALLY ALTERED AND CONSIST OF QUARTZ-FLOODED, CARBONITIZED AREAS. GOLD OCCURS BOTH AS NATIVE GOLD AND ASSOCIATED WITH SUL- FIDES. WHERE FOUND IN SULFIDES, IT OCCURS IN NARROWER VEINLETS WHERE PYRITE AND ARSENOPYRITE EXIST. SILVER IS ALSO ASSOCIATED WITH CARBONITIZED AREAS. SULFIDES HAVE BEEN OXIDIZED TO A DEPTH OF 80-100M.

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Producer
Commodity type Metallic
Significant Yes
Mining method Combined Methods
Year of first production 1965

Mining district

District name Charskoblast

Mineral rights holdings

Type of mineral rights Unknown

Ownership information

  • Type Owner
    Owner Kazgold - Kazakhstan Government
    Home office Cis
    Year 1991
  • Type Owner
    Owner Minproc
    Year 1991
  • Type Owner
    Owner Chilewich International
    Year 1991
  • Type Operator
    Owner Kazgold - Kazakhstan Government
    Home office Cis
    Year 1991

Production statistics

  • Year 1965
    Description Production As Slag Feed(1965-Present) 100000 Metric Tons/Yr.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Arsenic Arsenic 100000mt

Comments on the production information

  • ORE IS RICH IN AS AND C, MAKING IT REFRACTORY. THIS CAUSES PREG-ROBBING PROBLEMS AND REQUIRES NEW TECHNOLOGY TO TREAT. CURRENT PRODUCTION LEVEL OF 100,000 MT/YR. IS THE MAXIMUM ACHIEVABLE WITH CURRENT FACILITIES AND WITHOUT NEW PROCESSING METHODOLOGY. AS LIMITS THE AMOUNT THAT CAN BE TREATED.

Reserves and resources

  • Type In-situ
    Estimate year 1993
    Demonstrated 21000000mt ore
    Total resources 21000000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 9.4 g/mt Gold Major 1993
  • Type In-situ
    Estimate year 1994
    Total resources 31538000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 8.49 g/mt Gold Major 1994

Comments on the reserve resource information

  • UNAUDITED RESOURCE STATEMENTS BY OFFICIALS COME FROM THREE SOURCES: 100 MMT @ 8.3 G AU/MT- KAZMETAL/KAZGOLD; 33 MMT @ 8-10 G AU/MT- MINE STAFF; AND 200 MMT (GRADE NOT GIVEN)-KAZPOLYMETAL. WESTERN SERVICES ENGINEERING VISITED THE SITE FOR MINPROC AND ESTIMATES 33 MMT @ 8-9 G AU/MT AT THE PROVEN TO PROBABLE LEVEL.
  • REPORTED RESERVES ARE 31.538 MILLION TONS AT 8.49 G/T AU.

Workings at the site

  • Type of workings Surface
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Mining Method OPEN PIT
    Capacity 400
    Capacity Units MT ORE/DAY
    Operating Days per Year 250
    Year of Information 1991
  • Type of workings Underground
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method ESTIMATE
    Number of Shafts 5
    Number of Inclines 2
    Capacity 500
    Capacity Units MT ORE/DAY
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1991

Comments on other economic factors

  • WESTERN SERVICES RECOMMEND DETAILED MINE PLANS TO EXPLOIT RESOURCE BY BOTH SURFACE AND UNDERGROUND METHODS BE DEVELOPED. THEY RECOMMEND SURFACE MINING IF APPLICABLE, AND HIGH-GRADING BE GIVEN PRIORITY. SOME DEWATERING MAY BE REQUIRED. CURRENT PLANS CALL FOR PRODUCTION TO RESUME FROM THE WESTERNMOST OF THE THREE PITS, WHICH IS CURRENTLY BEING DEWATERED. THE ROCK RANGES FROM HARD TO SOFT AND IS DEPENDENT UPON THE AMOUNT OF FRACTURING AND QUARTZ CONTENT. DURING COLD MONTHS, THE ROCKS CAN FREEZE BECAUSE OF LIMITED MOISTURE AND THEIR PROPENSITY TO COMPACT UNDER PRESSURE. PRE-STRIPPING IS NOT CURRENTLY NECESSARY, BUT COULD BE NE- CESSARY DEPENDING UPON WHICH MINING METHOD IS SELECTED IN THE FUTURE. INCREASED PRODUCTION WOULD REQUIRE EITHER OPENING OF A NEW SURFACE PIT OR THE SUBSTANTIAL EXPANSION OF ONE OF THE CURRENT PITS, IF ECONOMICS INDICATED DEEPER PITS ARE MORE VIABLE THAN UNDERGROUND EXTRACTION. WESTERN SERVICES ESTIMATES A MAXIMUM ECONOMIC PIT DEPTH OF 100M, ASSUMING AN ORE GRADE OF 8.3 G AU/MT, $25/MT PLANT COST, $1.10/MT MINING COST, 90% METALLURGICAL RECOVERY, $360/OZ GOLD PRICE, PIT SLOPE OF 45 DEGREES, AND HORIZONTAL ORE THICK- NESS OF 40M. CURRENT MINING FLEET IS INADEQUATE AND ANTIQUATED. TRUCKS(15-TONNE) ARE UNDERSIZED AND PLAGUED BY CONSTANT REPAIR. IN-PIT LOADING BY ELECTRIC SHOVELS. ROAD SURFACES POORLY MAINTAINED. AMOUNT OF EXPLOSIVES AND BLASTHOLE SPACINGS APPEAR SUIT- ABLE FOR PITS. WASTE DUMPED NORTH OF PITS. ORE HAULED TO CRUSHING FACILITY, THEN HAULED TO RAIL STA- TION, ABOUT 45 KM AWAY, AT CHARSK.
  • CONCENTRATOR WAS BEGUN BUT NEVER FINISHED. IF JOINT VENTURE IS ACCOMPLISHED, MILL WOULD CONSIST OF CRUSHING, GRINDING, AND FLOTATION TO PRODUCE CONCENTRATE, THEN WOULD EMPLOY THE MINPROC REDOX PROCESS TO PRODUCE DORE BULLION. IF MINING OF 1 MMT ORE PER YEAR(226,851 OZ/YR.), CONCENTRATOR PLANNED TO PRODUCE 100,000 MT/YR. @ 77 G/MT(93% RECO- VERY). TAILINGS WOULD BE 900,000 MT/YR. @ .65 G/MT(7% RECOVERY) REDOX ACHIEVES 96% RECOVERY TO PRODUCE 238,000 OZ/YR. OVERALL RECOVERY USING THIS PROPOSED PROCESS IS 89%.

Reference information

Bibliographic references

  • Deposit

    DATA SUPPLIED BY KAZMETAL-1990,1991.

  • Deposit

    WESTERN SERVICES ENGINEERING SITE VISIT-1991.

  • Deposit

    TRIP REPORTS, FOO, K., MINPROC, 1990, 1991.

  • Deposit

    MINING MAGAZINE, JAN. 1993, P. 43.

  • Deposit

    SHABAD, T., BASIC INDUSTRIAL RESOURCES OF THE USSR,

  • Deposit

    COLUMBIA UNIV. PRESS, NEW YORK, 1969, PP. 291, 299.

  • Deposit

    THE NORTHERN MINER, FEBRUARY 8, 1993, P. 5.

  • Deposit

    MINPROC RESOURCES, INC., REPORT ON VISIT TO REPUBLIC OF

  • Deposit

    KAZAKHSTAN, FEB 11-15, 1991.

General comments

Subject category Comment text
Deposit THE MINE OPERATED SINCE 1965, PRODUCING 100,000 MT OF DIRECT SHIPMENT ORE FOR TRANSPORT AS GOLD-BEARING FLUX TO RUSSIAN SMELTERS. ORE IS ESPECIALLY REFRACTORY AND THE GOLD IS LOCKED WITHIN SULFIDES AND COMBINED WITH CARBONACEOUS MATERIAL, MAKING ORE UNTREATABLE USING CONVENTIONAL METALLURGY. LACK OF CAPITAL PREVENTED CONSTRUCTION OF SUITABLE PROCESSING FACILITY TO OPERATE AT THE FULL DESIGN CAPACITY OF 1 MMT/YR. CURRENT INFRASTRUCTURE CONSISTS OF THREE OPEN PITS; PRE- LIMINARY UNDERGROUND DEVELOPMENT, INCLUDING SHAFTS, A TEST CON- CENTRATOR, AND WATER AND POWER INFRASTRUCTURE. THE MINE IS LOCATED IN THE CHARSK REGION, 150 KM FROM SEMIPALATINSK, THE REGIONAL CAPITAL CITY. MINING METHODS CONSIST OF OPEN PIT METHODS, TOP SLICING, AND BLOCK CAVING METHODS. MINE ACCESS IS BY PAVED ROAD(110 KM) FROM SEMIPALATINSK TO CHARSK, AND BY ROAD FROM CHARSK TO THE MINE(45 KM). 13 KM OF THIS ROAD IS PAVED. RAIL LINE FROM SEMIPALATINSK TO CHARSK IS GOOD. DURING THE HARSH WINTER, THE MINE HAS BEEN ISOLATED FOR PERIODS OF 1-3 MONTHS. HOUSING FOR 6,000 RESIDENTS IS AVAILABLE, BUT ADDITIONAL HOUSING IS NEEDED IF EXPANSION OCCURS. THEY MUST BE ABLE TO STAND TEMPERATURES OF -40 TO 40 DEGREES CELSIUS. POWER IS SUPPLIED BY ONE 110 KV LINE AT 220 VOLTS. A SE- COND LINE IS BEING CONSTRUCTED FROM A SOURCE 72 KM TO THE NE. THE 100 MMT RESOURCE ESTIMATE WAS BASED ON ORE DIMENSIONS OF LENGTH 3KM, DEPTH 400M, AND WIDTH 250M. WESTERN SERVICES REPORTS THIRTY-FIVE DEFINED ORE LENSES, RANGING UP TO 500M LONG X 200M DEEP X 40M WIDTH. SPECIFIC GRA- VITY OF 2.7 WAS ASSUMED.

Reporter information

Type Date Name Affiliation Comment
Reporter 28-OCT-1994 Alaska Field Operations Center (AFOC) U.S. Bureau of Mines

Beyond USGS

Supplemental information added by qvyshift.com. Not part of the original USGS MRDS record.

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