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Flathead Mines

Plant in Flathead county in Montana, United States with commodities Gold, Silver, Lead, Copper, Zinc
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Sections on this page
  1. Identification information
  2. Geographic coordinates
  3. Site location context
  4. Geographic areas
  5. Public Land Survey System information
  6. Commodities
  7. Materials information
  8. Alteration
  9. Mineral occurrence model information
  10. Host and associated rocks
  11. Nearby scientific data
  12. Geologic structures
  13. Ore body information
  14. Controls for ore emplacement
  15. Economic information about the deposit and operations
  16. Mining district
  17. Mineral rights holdings
  18. Land status
  19. Ownership information
  20. Production statistics
  21. Reserves and resources
  22. Workings at the site
  23. Links to other databases
  24. Bibliographic references
  25. General comments
  26. Reporter information

Geologic information

Identification information

Deposit ID 10221224
MRDS ID W014676
MAS/MILS ID 0300290001
Record type Site
Current site name Flathead Mines
Alternate or previous names Hog Heaven Project

Geographic coordinates

Point of reference Main Entrance
Geographic coordinates: -114.58289, 47.92298 (WGS84)
Elevation 1207
Location accuracy 10(meters)

Site location context

Political divisions (FIPS codes)

Flathead(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Kofford Ridge(quadrangle 1:24,000 scale)

Polson(quadrangle 1:100,000 scale)

Wallace(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Lower Flathead(hydrologic unit)

Pend Oreille(hydrologic accounting unit)

Kootenai-Pend Oreille-Spokane(hydrologic subregion)

Pacific Northwest(hydrologic region)

Geographic areas

Country State County
United States Montana Flathead

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 025 N 023 W 17 N2SE Montana

Commodities

Commodity Importance
Gold Secondary
Silver Primary
Lead Primary
Copper Secondary
Zinc Critical Secondary

Materials information

Materials Type of material
Pyrite Ore
Galena Ore
Argentite Ore
Marcasite Ore
Bornite Ore
Enargite Ore
Silver Ore
Sphalerite Ore
Matildite Ore
Alunite Gangue

Alteration

  • (Local) SILICIFICATION, ALUNITIZATION; INTENSE SILICIFICATION

Mineral occurrence model information

Model code 104
USGS model code 25a
Deposit model name Hot-spring Au-Ag
Mark3 model number 45

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Felsic Volcanic Rock > Latite
    Rock unit name PORPHYRITIC LATITE
    Stratigraphic age (youngest) Pliocene
  • Host or associated Host
    Rock type Sedimentary Rock > Clastic Sedimentary Rock > Argillite
    Rock unit name Argillite
    Stratigraphic age (youngest) Neoproterozoic
  • Host or associated Associated
    Rock type
    Rock unit name Hog Heaven Volcanics; Porphyritic Latite Plug

Nearby scientific data

Main Entrance (1) -114.58289, 47.92298
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure name SHRODER CREEK FAULT, ELK MOUNTAIN ANTICLINE
Type of structure Local
Structure name WEST-TRENDING FRACTURES

Ore body information

  • General form PODS, SHOOTS; IRREGULAR
    Field Value
    MAS Matrix # 2
    MAS Column # 1
    Type of Orebody #1 SHEAR ZONE
    Shape of Orebody #1 LENTICULAR
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FRACTURING
    Secondary Ore Control FAULTING
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 SILICIFICATION
    Type of Wallrock Alter. #2 POTASSIC
    Date of Last Modification 830502
  • Thickness 18M
    Width 190M
    Depth to top 0M
    Field Value
    MAS Matrix # 3
    MAS Column # 1
    Type of Orebody #1 SHEAR ZONE
    Shape of Orebody #1 TABULAR
    Primary mode of Origin HYDROTHERMAL
    Primary Ore Control FRACTURING
    Secondary Ore Control FAULTING
    Degree of Wallrock Alter. MODERATE
    Type of Wallrock Alter. #1 SILICIFICATION
    Type of Wallrock Alter. #2 POTASSIC
    Minimum Depth to Top 0
    Avg. Thick. Unconsol. Mat. 0
    Min. Thick. Unconsol. Mat. 0
    Date of Last Modification 830502
  • Area 2980HA
    Field Value
    Total Surface Area (HA) 2980
    Date of Last Modification 910418

Controls for ore emplacement

  • PORPHYRITIC LATITE PLUG

Comments on the geologic information

  • THE ORIGIN OF THE ORE BODY AT THE FLATHEAD MINE INDICATES A LOW TEMPERATURE HOT SPRING ENVIRONMENT, PROBABLY ASSOCIATED WITH AN ANCIENT VOLCANIC VENT, WHERE METEORIC WATER MIXED WITH RISING METAL-BEARING SOLUTIONS. FRACTURING HAS PLAYED A LARGE PART IN THE DEVELOPMENT OF THE ORE, WHICH LARGELY OCCURS IN VEINS. THE FRACTURES ACTED AS AVENUES FOR THE ORE BEARING FLUIDS. OPEN SPACE FILLING WAS THE DOMINANT METHOD OF ORE EMPLACEMENT. THE VOLCANICS ARE TERTIARY IN AGE AND CONTAIN CLASTS OF PRECAMBRIAN METASEDIMENTS OF THE BURKE FORMATION AND THE WALLACE GROUP. THE VOLCANICS GENERALLY DIP 14-45 DEGREES SOUTH.
  • PRIMARY ORE MINERALS ARE GALENA, MATILDITE, AND MINOR ENARGITE, AND SPHALERITE. SECONDARY MINERALS ARE ARGENTITE, COVELLITE, AND MARCASITE. GANGE MINERALS ARE QUARTZ, PYRITE, BARITE, ALUNITE, AND JAROSITE. HIGH GRADE DEPOSITS ESSEN- TIALLY ARE MINED OUT.
  • BOTH SEDIMENTARY AND IGNEOUS ROCKS ARE FOUND WITHIN THE HOG HEAVEN DISTRICT. THE SEDIMENTARY ROCKS ARE PRINCIPALLY PRECAMBRIAN METASEDIMENTS OF THE BELT SERIES. AT LEAST TWO FORMATIONS ARE INCLUDED: THE BURKE FM FOUND EAST, WEST, AND NORTHWEST OF THE FLATHEAD MINE. THIS FM IS A GREEN-GRAY, THIN-BEDDED ARGILLITE; AND THE WALLACE GROUP FOUND NORTHEAST OF THE MINE. IT IS A THIN-BEDDED, NONCALCAREOUS LIGHT-GREY SHALE. THE ROCKS ARE NOT FOUND AT THE MINE, BUT ARE INCORPORATED AS CLASTS WITHIN YOUNGER LITHIC PORPHYRY AND TUFF UNITS. TWO SEPARATE PORPHYRY UNITS ARE RECOGNIZED AT THE MINE BECAUSE OF THEIR FELDSPAR PHENOCRYST MINERALOGY: A POTASSIC-RHYODACITE IS THE OLDER UNIT. IT IS INTENSELY ALTERED AND CONTAINS MORE AND LARGER SANADINE PHENOCRYSTS. THE YOUNGER COMPARATIVELY FRESHER UNIT IS A SODIC-RHYODACITE IN WHICH SANADINE IS SUBORDINATE TO THE PLAGIOCLASE. THIN INTERBEDS OF TUFF INDICATE THE ATTITUDE OF THE RHYODACITE.

Economic information about the deposit and operations

Operation type Surface-Underground
Development status Plant
Commodity type Metallic
Deposit size Small
Significant Yes
Discovery year 1913
Year of first production 1928
Plant type Beneficiation (Mill)
Plant subcategory Hydromet

Comments on exploration

  • 1913 - INITIAL DISCOVERY BY THE ANACONDA COMPANY.

    1928 - LESSEES DRIFTED TO THE ORE BODY.

    1929 - LEASE EXPIRED; ANACONDA COMPANY TOOK OVER.

    1930 - WORK SUSPENDED.

    1934 - MINE RE-OPENED.

    1937 - ANACONDA QUIT MINING.



    1946 - ?IDLE SINCE 1946?

    1958-1976 - PROPERTY LEASED PROPERTY.



    1963 -1982 OPERATED BY WAINO LINDBOM, LESSEE FROM ANACONDA.



    1960?S FLATHEAD MINES HELD SHORT-TERM LEASE WITH ANACONDA COMPANY; SHIPPED ?SUBSTANTIAL? ORE.

    1974 - PREDECESSOR TO COCA MINES (CONGDON AND CAREY, LTD. ?) LEASED SITE FROM ANACONDA.

    1975 - OPEN PIT MINE PROPOSED

    1982 - COCA REGAINED OPERATING CONTROL OF 10.5 SECTIONS AT HOG HEAVEN FROM SUPERIOR OIL COMPANY.

    1983-1988 - COCA MINES PROPOSED OPEN PIT USING A CYANIDE-FLOTATION PROCESS MNING 4,000 TO 5,000 TONS PER DAY.

Mining district

District name Hog Heaven District

Mineral rights holdings

Type of mineral rights State Lease
Type of mineral rights Private Lease

Land status

Ownership category Mixed

Ownership information

  • Type Owner-Operator
    Owner Coca Mines Inc.
    ID 2400284
    Interest 100
    Home office Colorado
    Year 1985

Comments on the ownership information

  • THE ORIGINAL MINE WAS OWNED AND OPERATED BY ANACONDA CO. THIS COMPANY OPERATED OR LEASED THE MINE FROM 1928 THROUGH 1964. CONGDON AND CAREY CO., NOW COCA MINES, LEASED THE PROPERTY FROM ANACONDA AND BURLINGTON NORTHERN IN 1975. THEY THEN SUBLET THE PROPERTY TO CANADIAN SUPERIOR IN 1979. IN MAY OF 1982, THE PROPERTY WAS RETURNED TO COCA MINES. COCA MINES CONTROLS 111/2 SECTIONS (2,980 HECTARES) IN THE HOG HEAVEN AREA, ALL OF WHICH IS LEASED FROM THE STATE OF MONTANA, THE BURLINGTON NORTHERN RAILWAY, AND ANACONDA MINERALS CORP.

Production statistics

  • Year 1930
    Period 1928-1930
    Accuracy Estimate
    Description Tonnes Of Ore Containing 46 Million Grams Of Silver (2,600 Gm/T). Estimated Total Production Between 1928-30 And 1934-64 Is 209,000 Tonnes Which Yielded 210 Million Grams Of Silver, 93,000 Grams Of Gold, 10.4 Million Kilograms Of Lead, And 272 Thousand Kilograms Of Copper From Both Surface And Underground Workings
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major Ore Silver Silver 2600g/mt
  • Year 1930
    Period 1928-1930
    Description Total Production Between 1928-30 By The Anaconda Co. Or It's Leasees Was 18,000

Comments on the production information

  • PRODUCT OUTPUT FOR SILVER USING 70% OF 152 GM/MT SILVER AND 907 TONNES PROCESSED PER DAY, 365 DAYS PER YEAR MAIN MINE. PRODUCT OUTPUT FOR GOLD USING 70% OF 0.44 GM/MT GOLD AND 907 TONNES PROCESSED PER DAY, 365 DAYS PER YEAR MAIN MINE OLE MINE PRODUCT OUTPUT FOR SILVER AT 63 GM/MT AND 80% RECOVERED FROM 907 TONNES PER DAY OLE MINE PRODUCT OUTPUT FOR GOLD AT 0.39 GM/MT AND 80% RECOVERED FROM 907 TONNES PER DAY. ORE FROM OLE MINE HIGHLY OXIDIZED AND DOES NOT NEED FLOTATION STEP.
  • DORE ASSUMED TO BE 95% SILVER.

Reserves and resources

  • Type In-situ
    Estimate year 1985
    Measured 2700000mt ore
    Demonstrated 2700000mt ore
    Total resources 2700000mt ore
    Commodity Subtype Grade units Group Importance Year
    Gold Au 0.48 g/mt Gold Minor 1985
    Silver Ag 237.6 g/mt Silver Major 1985

Comments on the reserve resource information

  • M1C1=M2C1+M3C1. RESERVES WERE DETERMINED AFTER DRILLING OVER 400 HOLES, AND SAMPLING THE OLD UNDERGROUND WORKING AT THE MAIN MINE. RECOVERABLE INDICATED ORE WITH A 15% DILUTION FACTOR EQUALS 3,651,000 MT GRADING 109 GM SILVER PER METRIC TON AND 0.48 GM GOLD PER METRIC TONNE. RESERVES AS OF DEC. 31, 1984 FROM COCA MINES INC. 1984 ANNUAL REPORT, P. 6. COCA MINES INC., HOG HEAVEN OPTIMIZATION STUDY.

Workings at the site

  • Type of workings Surface
    Area 2980HA
    Field Value
    MAS Development Schedule # 1
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Swell Factor .65
    Percent Waste Rock 99.9
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 6
    Capacity 907
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 0
    Unit Production Cost 5.17
    Units of Production $/MT ORE
    Operating Days per Year 250
    Operating Shifts per Day 2
    Year of Information 1983
  • Type of workings Surface
    Area 2980HA
    Field Value
    MAS Development Schedule # 2
    Mining Record # 1
    Status of Mining Method PROPOSED
    Mining Method OPEN PIT
    Swell Factor .65
    Percent Waste Rock 99.9
    Hardness of Ore M-HARD ROCKS
    Avg. Bench Height (meters) 6
    Capacity 1600
    Capacity Units MT ORE/DAY
    Preprod. Stripping Vol. 0
    Unit Production Cost 4.96
    Units of Production $/MT ORE
    Operating Days per Year 300
    Operating Shifts per Day 2
    Year of Information 1989

Comments on the workings information

  • OPENED BY FIVE TUNNEL LEVELS AND DRIFTS; SQUARE SET STOPING. PRODUCED 30 TO 40 TONS SILVER ORE PER DAY THAT WAS SHIPPED TO THE WASHOE SMELTER. AND 40 TO 50 TONS PER DAY LEAD-SILVER ORE THAT WAS SHIPPED TO THE EAST HELENA SMELTER (MBMG MINERAL PROPERTY FILES)



    NO. 1 (UPPER) TUNNEL, NO. 2 (INTERMEDIATE) TUNNEL, AND NO. 3 (LOWER) TUNNEL.



    UPPER TUNNEL IN 1930?S HAD 1,700 FT OF DRIFTS AND CROSSCUTS (AND WITH STOPES);

    1,300 FT ON THE INTEREMEDIATE LEVEL (WITH STOPES) ; AND

    1,250 FT ON THE LOWER LEVEL.



    ORE BODY DEVELOPED (IN THE 1930?S) TO A WIDTH OF 150 FEET AND LENGTH OF 400 FEET; EXPLORED IN THE 1930?S TO A DEPTH OF 150 FEET. (SHENON AND TAYLOR, 1936).

Comments on other economic factors

  • THE MAIN MINE ORE CONSISTS OF A MIXED OXIDE-SULFIDE MATERIAL THAT BOTH FLOTATION AND CYANDIATION WILL BE USED TO RECOVER SILVER VALUES. ABOUT 70% SILVER RECOVERY IS EXPECTED. OLE HILL ORE CONSISTS OF A HIGHLY OXIDIZED ORE WHICH IS AMENABLE TO CYANIDATION, WITH AN EXPECTED 80% RECOVERY. MAIN MINE ORE RUNS 152 GM/MT AG, 0.44 GM/MT AU OLE MINE ORE RUNS 63 GM/MT AG, 0.39 GM/MT AU
  • UNIT PRODUCTION COSTS WILL VARY OVER THE LIFE OF THE MINE: 1985-86 1987-88 1989-90 1991-96 MINING 3.00 5.25 7.50 3.00 MILLING 15.00 15.00 15.00 12.50 TOTAL $18.00 $20.25 $22.50 $15.50 SURFACE MINE INVESTMENTS YEAR COST TOTALS ACQUISITION UNKNOWN FEE SIMPLE EXPLORATION 1975 $250,000 1976 250,000 1977 250,000 1978 250,000 1979 1,200,000 1980 1,200,000 1981 1,200,000 $4,600,000 DEVELOPMENT 1979 $300,000 1980 300,000 1981 300,000 1982 100,000 1983 100,000 1984 500,000 1990 300,000 $1,900,000 MINE PLANT AND EQUIPMENT 1983 3,300,000 1984 7,700,000 $11,000,000 MINE INFRASTRUCTURE 1983 160,000 1984 640,000 800,000 MINE WORKING CAPITAL* 1985 79,000 1986 79,000 1987 137,000 1988 137,000 1989 194,000 1990 194,000 1991 79,000 1992 79,000 1993 79,000 1994 79,000 1995 79,000 1996 79,000 1,294,000 TOTAL 19,594,000 *APPROXIMATE % OF FIGURES GIVEN IN APPENDIX-A, MINE AND MILL WORKING CAPITAL-AS SHOWN FOR EACH YEAR OF PRODUCTION. AVERAGE PRODUCTION COST FOR THE MAIN MINE OVER THE SIX YEAR LIFESPAN IS $5.17 PER METRIC TONNE.
  • 1928-1930 20,000 TONS ORE YIELDED 1,500,000 OZ AG;

    1928 - X00 TONS ORE

    1929 - 10,000 TONS ORE YIELDED 900,000 OZ AG

    1930 - 10,000 TONS ORE YIELDED 500,000 OZ AG

    1934-1946 - 3,000,000 OZ AG PRODUCED



    1928 TO 1946 - 248,402 TONS ORE YIELDED 3,379.53 OZ AU, 6,926,406 OZ AG, 631,125 LBS CU, 23,628,602 LBS PB, AND 3,500 LBS ZN (TOTAL OF $6,033,622).



    RATIO OF SILVER TO LEAD 10:1 TO 7:1.



    ESTIMATED TOTAL PRODUCTION OF SILVER WAS 8.8 MILLION OUNCES IN A 20-YEAR PERIOD.



    RESERVES ESTIMATED BY COCA MINES IN 1984 AS 3,000,000 TONS GRADING 6.93 OZ AG, AND 0.014 OZ AU; OPEN-PIT RESERVES 1,314,000 TONS GRADING 5.37 OZ AG, AND 0.014 OZ AU; UNDERGROUND RESERVES WERE 623,000 TONS GRADING 11.24 OZ AG AND 0.007 OZ AU.

    OPEN-PIT RESERVES ALSO ESTIMATED AT 1.8 MILLION TONS AT 6 OPT AG.



    RESERVES FROM A COCA MINES 1989 FIRST QUARTER REPORT:

    PROVEN: 2,891,940 TONS OF 4.88 OPT AG; 14,552,000 CONTAINED OZ AG; 0.018 OPT AG; 54,000 CONTAINED OZ;

    PROBABLE: 904,200 TONS OF 10.40 OPT AG; 9,404,000 CONTAINED OZ AG; 0.020 OPT AU; 18,000 CONTAINED OZ;

    POSSIBLE: 450,000 TONS OF 9.17 OPT AG; 4,127,000 SONTAINED OZ AG; 0.006 OPT AU; 3,000 CONTAINED OZ.

Reference information

Bibliographic references

  • Reserve-Resource

    COCA MINES INC. 1984 ANNUAL REPORT, P.6.

  • Deposit

    MONTANA BUREAU OF MINES AND GEOL. MEMOIR 31, 1949, P. 24.

  • Deposit

    MONTANA BUREAU OF MINES AND GEOL. BULLETIN 95, 1975, P. 8.

  • Deposit

    COCA MINING COMPANY. MINE/DEPOSIT FILE REPORT-FLATHEAD MINES, POLSON, MT. FINAL REPORT, U.S. BUREAU OF MINES CONTRACT NO. S0221028, MARCH 1983.

  • Deposit

    CAREY, C. C. ALTERATION PETROLOGY AND MINERALIZATION OF THE HOG HEAVEN MINING DISTRICT, MT. MS THESIS, UNIV. OF MONTANA, 1981.

  • Deposit

    JOHNS, W. M., 1970, GEOLOGY AND MINERAL DEPOSITS OF LINCOLN AND FLATHEAD COUNTIES, MONTANA: MONT. BUR. MINES GEOL. BULL. 79, 182 P.

  • Deposit

    SHENON, P.J., AND TAYLOR, A.V. JR., 1936, GEOLOGY AND ORE OCCURRENCE OF THE HOG HEAVEN MINING DISTRICT, FLATHEAD COUNTY, MONTANA: MBMG MEMOIR 17, 26 P.

  • Deposit

    SAHINEN, U.M., JOHNS, W.M., AND LAWSON, D.C., 1965, GEOCHEMICAL RECONNAISSANCE STREAM-SAMPLING IN FLATHEAD AND LINCOLN COUNTIES, MONTANA: MBMG BULLETIN 48, 16 P.

  • Deposit

    YOUNG, F.M., CROWLEY, F.A., AND SAHINEN, U.M., 1962, MARKETING PROBLEMS OF SMALL BUSINESS ENTERPRISES ENGAGED IN LEAD AND ZINC MINING: MBMG BULLETIN 30, P. 20.

  • Deposit

    LANGE, I.M., AND ZEHNER, R.E., 1989, ISOTOPE DATA, AGES, AND GEOLOGY OF THE HOG HEAVEN VOLCANIC FIELD, NORTHWESTERN MONTANA: ISOCHRON/WEST, V. 54, P. 8-10.

  • Deposit

    SHENON, P.J., 1935, GENESIS OF ORE AT THE FLATHEAD MINE, NORTHWESTERN MONTANA: ECONOMIC GEOLOGY AND THE BULLETIN OF THE SOCIETY OF ECONOMIC GEOLOGISTS, V. 30, NO. 6, P. 585-603.

Comments on the references

  • JOHNS, W. M., 1970, GEOLOGY AND MINERAL DEPOSITS OF LINCOLN AND FLATHEAD COUNTIES, MONTANA: MONT. BUR. MINES GEOL. BULL. 79, 182 P.?SHENON, P.J., AND TAYLOR, A.V. JR., 1936, GEOLOGY AND ORE OCCURRENCE OF THE HOG HEAVEN MINING DISTRICT, FLATHEAD COUNTY, MONTANA: MBMG MEMOIR 17, 26 P.?SAHINEN, U.M., JOHNS, W.M., AND LAWSON, D.C., 1965, GEOCHEMICAL RECONNAISSANCE STREAM-SAMPLING IN FLATHEAD AND LINCOLN COUNTIES, MONTANA: MBMG BULLETIN 48, 16 P.?YOUNG, F.M., CROWLEY, F.A., AND SAHINEN, U.M., 1962, MARKETING PROBLEMS OF SMALL BUSINESS ENTERPRISES ENGAGED IN LEAD AND ZINC MINING: MBMG BULLETIN 30, P. 20.?LANGE, I.M., AND ZEHNER, R.E., 1989, ISOTOPE DATA, AGES, AND GEOLOGY OF THE HOG HEAVEN VOLCANIC FIELD, NORTHWESTERN MONTANA: ISOCHRON/WEST, V. 54, P. 8-10.?SHENON, P.J., 1935, GENESIS OF ORE AT THE FLATHEAD MINE, NORTHWESTERN MONTANA: ECONOMIC GEOLOGY AND THE BULLETIN OF THE SOCIETY OF ECONOMIC GEOLOGISTS, V. 30, NO. 6, P. 585-603.?

General comments

Subject category Comment text
Deposit MOST PHENOCRYSTS (BOTH NUMEROUS MODERATELY-DEVELOPED PLAGIOCLASE AND LESSER BUT LARGER, WELL DEVELOPED SANIDINE) WERE PARTLY OR WHOLLY REMOVED AND SOME WERE REPLACED BY BARITE, QUARTZ, OR SULFIDES (SHENON AND TAYLOR, 1936)



UNIQUE ?BEIDELLITE? OR FUMEROLE MUD IS FOUND IN IRREGULAR BODIES OR ALONG FRACTURES. (SHENON AND TAYLOR, 1936)



CELLULAR STRUCTURE - FORMED WHEN FELDSPARS WERE LEACHED LEAVING VOIDS THEN ENTIRELY OR PARTLY FILLED WITH BARITE, QUARTZ, CLAY, OR IRON OXIDES - DEFINES THE LIMITS OF THE ORE BODY



?FISSUREE VEINS AND PODS IN ALTERED PORPHYRITIC LATITE STOCK INTRUSIVE INTO RAVALLII GROUP (ZARTMAN AND STACEY)
Deposit ORE BODY SHAPED LIKE "INVERTED MEXICAN HAT". "BRIM" IS ZONE OF INTENSE SUPERGENE ENRICHMENT, "CROWN" IS FILLED WITH VEINS AND PODS OF PRIMARY ORE SHOWING SOME ENRICHMENT. MAIN VEIN IS NEARLY VERTICAL AND BISECTS "CROWN".;



ROUGHLY ELLIPTICAL IN UPPER PORTION AND THEN ?MOLAR TOOTH? WITH ROOTS DOWNWARD ON THE LOWER LEVEL (SHENON AND TAYLOR, 1936)
Deposit Merged data from Deposit ID's 10173155 (West Flathead Mine),

10071341 (West Flathead Mine), and 10071342 (Flathead Mine)

Reporter information

Type Date Name Affiliation Comment
Reporter 21-JAN-98 Avery, Dale U.S. Bureau of Mines

Beyond USGS

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

Current status (per MSHA)

StatusAbandoned since 09/09/1988
MSHA mine ID2400284
Mine name (MSHA)Hog Heaven Mine
Current operatorCoca Mines Inc
Mine typeUnderground (Metal / non-metal)

MSHA cross-reference per the original MRDS record. Mine status and operator reflect MSHA's last published Mines export (February 2025); MSHA's public bulk feed has been unavailable since, so this may be out of date. See the Mine Data Retrieval System for current status.

Open MSHA's Mine Data Retrieval System for inspections, accidents, and violations for this mine.

External references

Maps centered on this site