Carr Fork Mine

Site Name

Primary: Carr Fork Mine
Secondary: Carr Fork Copper Deposit
Secondary: Utah Apex Pre 1947
Secondary: Apex Mine and Tunnel
Secondary: Bingham Limestone Copper Deposit

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Commodity

Primary: Silver
Primary: Copper
Primary: Zinc
Primary: Lead
Secondary: Gold
Secondary: Manganese
Secondary: Molybdenum
Tertiary: Platinum
Tertiary: Palladium
Tertiary: Iron

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Location

State: Utah
County: Tooele
District: Bingham District

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Land Status

Land ownership: Private
Note: the land ownership field only identifies whether the area the mine is in is generally on public lands like Forest Service or BLM land, or if it is in an area that is generally private property. It does not definitively identify property status, nor does it indicate claim status or whether an area is open to prospecting. Always respect private property.

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Holdings

Not available

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Workings

Not available

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Ownership

Owner Name: Anaconda Co.
Years: 1981 -

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Production

Year: 1981
Mined: 1276960.000 mt
Material type: ore
Year: 1980
Mined: 584074.000 mt
Material type: ore
Year: 1979
Mined: 49678.000 mt
Material type: ore

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Deposit

Record Type: Deposit
Operation Category: Past Producer
Deposit Type: Skarn Cu
Operation Type: Unknown
Discovery Year: 1873
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: Y
Deposit Size: L

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Physiography

General Physiographic Area: Intermontane Plateaus
Physiographic Province: Basin And Range Province
Physiographic Section: Great Basin
Physiographic Detail: Uinta Extension

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Mineral Deposit Model

Model Name: Skarn Cu

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Orebody

Form: IRREGULAR, TABULAR, WEDGE

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Structure

Type: L
Description: Faults, Folds, Fractures And Fissures

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Alterations

Alteration Type: L
Alteration Text: Dolomitization, Diopsitization, Actinloitization, Biotitization, Silicification, Chloritization

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Rocks

Name: Quartz Monzonite
Role: Associated
Age Type: Host Rock
Age Young: Pennsylvanian

Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Eocene

Name: Limestone
Role: Host
Age Type: Host Rock
Age Young: Carboniferous

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Analytical Data

Analytical Data: SEE CAMERON AND GARMOE FOR ANALYTICAL DATA. PT=0.002-0.01 OZ/TON (69-340 PPB), PD=0.003-0.028 OZ/TON (100-960 PPB) IN MINERALIZED LIMESTONE

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Materials

Ore: Chalcopyrite
Ore: Limonite
Ore: Hematite
Ore: Rhodochrosite
Ore: Molybdenite
Ore: Galena
Ore: Sphalerite
Gangue: Biotite
Gangue: Talc
Gangue: Opal
Gangue: Epidote
Gangue: Wollastonite
Gangue: Garnet
Gangue: Clay
Gangue: Diopside
Gangue: Actinolite

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Comments

Comment (Identification): DATA MERGED from Carr Fork Copper Deposit Deposit ID 10300633

Comment (Identification): The Carr Fork Mine and related North Ore Shoot Extension: are two seperate records, SEE "North Ore Shoot Extension" DEPOSIT ID 10276611ALSO "Bingham Open Pit Mine" DEPOSIT ID 10069296 and "Bingham Canyon (Plant)" DEPOSIT ID 10129805

Comment (Geology): LIMESTONE GRADES FROM DARK GRAY TO BLACK THROUGH BANDED, GRAY, BLACK, AND WHITE TOWARD MORE INTENSELY SILICATED ZONES AT IGNEOUS CONTACTS. ORE MINERALS ARE INTIMATELY ASSOCIATED WITH QUARTZ VEINS IN ALTERED WALL ROCKS.

Comment (Production): PRODUCTION THROUGH 1947 CONSISTED OF 11.972 MILLION TONS OF PB, ZN, AG, CU ORE AVERAGING 8% PB, 5% ZN, 4 OZ/TON AG, 2-2.5% CU. THESE PRODUCTION FIGURES ARE FROM OLD MINES

Comment (Development): VCR (VERTICAL CRATER RETREAT) MINING IS USED TO REDUCE BLAST DAMAGE THROUGHOUT THE MINE AND, AT THE SAME TIME, PRODUCE BETTER FRAGMENTATION.

Comment (Deposit): DEPOSIT LIES ON WEST FLANK OF OQUIRRH MOUNTAINS ALONG OCCIDENTAL FAULT. ORE IS A SKARN FORMED IN TWO LIMESTONE UNITS ENCLOSED BY QUARTZITES. EVIDENCE SUGGESTS TWO GOLD MINERALIZING EPISODES. SOME GEOLOGISTS CLASSIFY THIS DEPOSIT AS A CU SKARN OR A GOLD-BEARING SKARN.

Comment (Commodity): HIGH-GRADE GOLD ZONE CHARACTERIZED BY ANOMALOUS AU, AS, SB, HG, SI, S, AND TL AND DEPLETED PD, CA, AND SE.

Comment (General): The Carr Fork mine was developed on section of the Carr Fork/North Ore Shoot skarn deposits which are part of the Bingham Canyon porphyry system in the Central Oquirrh Mountains, near Sat Lake City, northern Utah, USA. They occur in the immediate contact zone of the Bingham Stock, adjacent to the Bingham Canyon open pit.

Comment (Deposit): RECORD W002689 HAS BEEN DELETED.

Comment (Location): 6,500 FT S35W OF MARKHAM PEAK IN PINE CANYON. LOCATION GIVEN IS FOR SHAFT SYMBOL SHOWN AT APPROPRIATE LOCATION ON TOPO MAP INFO FROM LAND.ST :(1977)

Comment (Reserve-Resource): ORE (2% CU, 90% RECOVERY)

Comment (Workings): 4 CIRCULAR, CONCRETE-LINED SHAFTS OPERATED FOR PRODUCTION, SERVICE, EXHAUST AIR, AND FRESH AIR. THE FRESH AIR SHAFT IS COLLARED NEAR END OF THE 1,830 M PINE CANYON TUNNEL. SERVICE SHAFT IS COMPLETE TO 1,172 M. MINE DEVELOPMENT IN PROGRESS ON MAIN LEVELS WAS AT ELEVATIONS OF 970 AND 1,200 M ABVOVE SEA LEVEL. THE 1,200 LEVEL IS 4.5 M HIGH BY 3.7 M WIDE AND PROVIDES GENERAL ACCESS TO MINE WORKINGS. MINE FLOODED BY 1987.

Comment (Deposit): EAST AND DIPS 50S. THE TRACE OF THE AXIAL PLANE IS LOCATED IMMEDIATELY NORTH OF APEX SHAFT AND JUST NORTH OF CARR FORK MINE EXHAUSE SHAFT. ROCKS ON SOUTH LIMB OF ANTICLINE DIP 20-30N AND STRIKE N60-80W; THOSE ON NORTH LIMB DIP 70-80N AND STRIKE N70-80W. ONLY A MINOR AMOUNT OF NORMAL FAULTING WITH APPARENT MAXIMUM OFFSET OF 20 FT IS OBSERVIED AT SURFACE. BEST CU VALUES ARE IN MARBLIZED-SILICATED ZONES AND PB-ZN-CU ORES ARE IN TRANSITION FROM WHITE TO BLACK LIMESTONE. THE MORE INTENSELY SILICATED LIMESTONE HAS BECOME A MASSIVE OR GRANULAR GARNETITE CONTAINING SPECULAR HEMATITE, MAGNETITE, CHALCOPYRITE, PYRITE. CONSEQUENTLY A TELESCOPING ORDER OF MINERALIZATION MAY FOLLOW A PATTERN SUCH AS CU-PB-ZN, PB-CU-ZN, PB-ZN-CU, ZN-PB-MN. AG AND AU ARE PRESENT IN VARIABLE AMOUNTS THROUGHOUT BUT INCREAST IN AN OUTER ENVIRONMENT. ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT; 3 FIELD OBSERV

Comment (Deposit): SEDIMENTARY SECTION EXPOSED IN CARR FORK AREA IS ABOUT 2,150 FT THICK; IT INCLUDES 2 THICK LIMESTONES IN LOWER PART OF SECTION SEPARATED AND OVERLAIN BY CALCAREOUS QUARTZITE AND THIN SILTY LIMESTONE. ALTERATION IN QUARTZITE AND SILTY LIMESTONE IS CHARACTERIZED BY REPLACEMENT OF CALCITE BY DIOPSIDE, WHICH WAS LATER ALTERED TO QUARTZ-ACTINOLITE-CALCITE RESULTING IN ALTERATION ENVELOPES ALONG FRACTURES NEAR BINGHAM STOCK AND ORBICULAR TEXTURES FARTHER AWAY. BIOTITE REPLACED ACTINOLITE IN ENVELOPES NEAR STOCK. THICKER LIMESTONES SHOW A PROGRESSIVE ALTERATION TO CALCITE-WOLLASTONITE, ANDRADITE-CALCITE-WOLLASTONITE, ANDRADITE-WOLLASTONITE, AND ANDRADITE-QUARTZ. CHALCOPYRITE DEPOSITION WAS GREATEST IN ANDRADITE-BEARING ROCKS. DIOPSIDE-SALITE MAY HAVE FORMNED WITH ANDRADITE BUT ITS DISTRIBUTION AND PARAGENESIS ARE OBSCURED BY ITS SUSCEPTIBILITY TO CLAY ALTERATION AND LEACHING. EXPOSED SEMINENTARY ROCKS LIE ON LIMBS OF AN OVERTURNED ANTICLINE, THE AXIAL PLANE OF WHICH STRIKES NEARLY

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References

Reference (Deposit): COOK, D.R., 1961, GEOLOGY OF THE BINGHAM MINING DISTRICT AND NORTHERN OQUIRRH MOUNTAINS: GUIDEBOOK TO THE GEOLOGY OF UTAH, NO. 16, UTAH GEOLOGICAL SOCIETY, 145 P.

Reference (Deposit): BRAY, E.R., AND WILSON, J.C., 1975, GUIDEBOOK TO THE BINGHAM MINING DISTRICT: SOCIETY OF ECONOMIC GEOLOGISTS, BINGHAM CANYON, UTAH, OCT. 23, 1975, 156 P.

Reference (Production): REVIEW 74/06 CRIB MINERAL RESOURCES FILE 12, P. 1821; CAMERON AND GARMOE, 1987

Reference (Deposit): BOUTWELL, J.M., 1905, ECONOMIC GEOLOGY OF THE BINGHAM MINING DISTRICT, UTAH: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 38, 410 P.

Reference (Deposit): COX, D.P., U.S. GEOLOGICAL SURVEY, UNPUB. DATA.

Reference (Deposit): BUTLER, B.S., LOUGHLIN, G.F., HEIKES, V.C., AND OTHERS, 1920, THE ORE DEPOSITS OF UTAH: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 111, 672 P.

Reference (Reserve-Resource): COX, UNPUB. DATA

Reference (Geology): Atkinson, W.W.,Jr. and Einaudi, M.T. 1978, Skarn Formation and Mineralization in the Contact Aureole at Carr Fork, Bingham, Utah; Economic Geology Vol. 73, 1326-1365

Reference (Geology): Phillips C H, Harrison E D and Smith T W, 2005 - Geology of the Bingham Mining District, Salt Lake County, Utah, in Porter T M, (Ed), Super Porphyry Copper and Gold Deposits: A Global Perspective, v1 pp 243-257

Reference (Deposit): CAMERON, D.E., AND GARMOE, W.J., 1987, GEOLOGY OF SKARN AND HIGH-GRADE GOLD IN THE CARR FORK MINE, UTAH: ECONOMIC GEOLOGY, V. 82, P. 1319-1333.

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