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Diamond Hill Mine

Past Producer in Broadwater county in Montana, United States with commodities Gold, Tungsten, Bismuth, Silver
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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. Ownership information
  18. Production statistics
  19. Reserves and resources
  20. Workings at the site
  21. Links to other databases
  22. Bibliographic references
  23. General comments
  24. Reporter information

Geologic information

Identification information

Deposit ID 10071357
MRDS ID W014695
Record type Site
Current site name Diamond Hill Mine
Alternate or previous names North Zone, Glory Hill Zone

Geographic coordinates

Point of reference Geographic coordinates: Elevation UTM Precision Relative position Point location
Ore Body -111.6625, 46.3147 (WGS84) 82 Km E Of Montana Tunnels; 45 Km Se Of Helena
(click for info)
-111.67503, 46.31351 (WGS84) 1652 ABOUT 12 KM WEST OF TOWNSEND

Site location context

Political divisions (FIPS codes)

Broadwater(county)

Montana(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Giant Hill(quadrangle 1:24,000 scale)

Townsend(quadrangle 1:100,000 scale)

White Sulphur Springs(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

Upper Missouri(hydrologic unit)

Upper Missouri(hydrologic accounting unit)

Missouri-Marias(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Bureau of Land Management(Bureau of Land Management MT)

Bureau of Land Management MT BLM(Type of land area)

BLM(Federal land areas administered by BLM)

Geographic areas

Country State County
United States Montana Broadwater

Public Land Survey System information

Meridian Township Range Section Fraction State
Montana Principal 007N 001W 36 Montana

Commodities

Commodity Importance
Gold Primary
Tungsten Critical Secondary
Bismuth Critical Secondary
Silver Secondary

Materials information

Materials Type of material
Limonite Ore
Pyrite Ore
Scheelite Ore
Gold Ore
Chalcopyrite Ore

Alteration

  • (Local) SILICIFICATION AND BLEACHING

Mineral occurrence model information

Model code 64
USGS model code 18f
Deposit model name Skarn Au
Mark3 model number 82

Host and associated rocks

  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock type qualifier ANDESITIC TUFFS
  • Host or associated Host
    Rock type Volcanic Rock (Aphanitic) > Intermediate Volcanic Rock > Andesite
    Rock unit name Elkhorn Volcanics, Andesite;Cret-Tert
    Rock description Elkhorn Volcanics, Andesite;Cret-Tert
  • Host or associated Associated
    Rock type Plutonic Rock > Mafic Intrusive Rock > Diorite
    Rock type qualifier SYENODIORITE; QUARTZ DIORITE
    Rock unit name SILVER WAVE STOCK; DIAMOND HILL STOCK
    Stratigraphic age (youngest) Late Cretaceous
    Stratigraphic age (youngest) Pliocene
  • Host or associated Associated
    Rock type Plutonic Rock > Granitoid > Granite
    Rock unit name SILVER WAVE STOCK; DIAMOND HILL STOCK

Nearby scientific data

Ore Body (1) -111.6625, 46.3147
ListMap
(2) -111.67503, 46.31351
ListMap

Economic information

Geologic structures

Type of structure Regional
Structure description Boulder Batholith, Lombard Overthrust
Type of structure Local
Structure description Aplite And Quartz Diorite Dikes

Ore body information

  • General form TABULAR, CHIMNEYLIKE ORE SHOOTS
    Strike N 7 W
    Dip 40 - 85 NE
    Length 1000M
    Width 55M

Controls for ore emplacement

  • Deposit Is In North-Trending Zone Of Stocks

Comments on the geologic information

  • ?IN A NORTH-TRENDING BELT OF METAMORPHOSED TUFF IN THE ELKHORN MOUNTAINS VOLCANICS ADJACENT TO THE SILVER WAVE STOCK? (KLEPPER AND OTHERS, 1971).

    STRIKES N07W, DIPS 40 TO 85 NE; RANGES FROM 50 FEET TO 175 FEET IN WIDTH. (REED, 1971).
  • Pegasus Gold 1996 10-K contains a succinct geological description.

Economic information about the deposit and operations

Operation type Underground
Development status Past Producer
Commodity type Metallic
Deposit size Small
Significant Yes
Discovery year 1877
Year of first production 1885
Milling method Gravity

Comments on exploration

  • 1880 TO EARLY 1900?S - A SCOTTISH COMPANY ACQUIRES AND DEVELOPS DEPOSIT.

    1931 - ANACONDA COMPANY DRILLING PROGRAM.

    1940?S - SMALL AMOUNT OF DEVELOPMENT.

    1970 - DUVAL OPTIONED CLAIMS; EXPLORATION WORK.

    1971(?) - AMAX OPTIONED PROPERTY AND HAD DRILLING PROGRAM.

    1998 - PEGASUS FILES FOR BANKRUPTCY, REORGANIZES AS APOLLO GOLD.

    1999 - PEGASUS SUSPENDS OPERATIONS AT DIAMOND HILL BECAUSE OF LOW CASH FLOW

Mining district

District name Indian Creek District

Ownership information

  • Type Owner-Operator
    Owner Palmer Engh,
    Home office Box 231, Townsend, Montana
  • Type Operator
    Owner Calim Private Equity LLC
    Interest 100

Production statistics

  • Year 1996
    Material Pegasus Gold Inc 1997 10-K p. 8
    Accuracy Accurate
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Primary Gold Gold 270000g
  • Year 1997
    Material Pegasus Gold Inc. 1997 10-K pp. 8, 14.
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Secondary Silver Silver 330000g
    Primary Gold Gold 1300000g
  • Year 2000
    Period 1880-2000
    Material ore
    Ore mined 760000mt
    Importance Item Commodity Group Amount recovered Grade Recovery percentage
    Major AU Gold Gold 5831902.68g

Comments on the production information

  • REED REPORTS TOTAL PRODUCTION 1880-1900'S AS $500,000 WITH GRADE UP TO 16 TOZ/ST AU. GRADE OF MATERIAL MINED SINCE 1940 RANGED FROM 0.1 TO 0.5 TOZ PRODUCTION HAS BEEN ESTIMATED FROM DOLLAR VALUE AND ASSUMED AVERAGE GRADE OF 0.4 TOZ/ST AU.

Reserves and resources

  • Type In-situ
    Estimate year 1997
    Probable 198000mt ore
    Remarks Pegasus Gold Inc. 1997 10-K p. 8.
    Commodity Subtype Grade units Group Importance Year
    Gold 8.1 g/mt Gold Major 1997
  • Type In-situ
    Estimate year 2000
    Total resources 211000mt ore

Comments on the reserve resource information

  • MINERALIZED AREA ABOUT 2700 FT BY 100 FT WIDE BY 250 FT DEEP CONTAINS 5.6 MILL. ST. HIGH GRADE SHOOTS HAVE BEEN MINED, BUT TOTAL ORE AND WASTE ALMOST CERTAINLY LESS THAN 600,000 ST.

Workings at the site

  • Type of workings Surface/Underground
    Length 1100M
    Overall depth 80M
    Overall length 731.52M
    Overall width 60M

Comments on the workings information

  • DEVELOPMENT WORKINGS INCLUDE 8 ADITS, SEVERAL SMALL OPEN CUTS AND ONE SHALLOW PROSPECT SHAFT. MOST ORE PRODUCED WAS EXTRACTED BY GLORY HOLE METHODS; MORE RECENT PRODUCTION FROM SURFACE "POCKET HUNTING" VENTURES.

Reference information

Bibliographic references

  • Deposit

    REED, G. C., 1951, MINES AND MINERAL DEPOSITS (EXCEPT FUELS), BROADWATER COUNTY, MONTANA: U.S. BUREAU OF MINES INF. CIRC. 7592, 58 P

  • Geology

    KLEPPER, M.R., RUPPEL, E.T, FREEMAN, V.L., AND WEEKS, R.A., 1971, GEOLOGY AND MINERAL DEPOSITS, EAST FLANK OF THE ELKHORN MOUNTAINS, BROADWATER COUNTY, MONTANA: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 665, 66 P

  • Production

    USBM IC 7592

  • Deposit

    CORRY, A.V., 1933, SOME GOLD DEPOSITS OF BROADWATER, BEAVERHEAD, PHILLIPS, AND FERGUS COUNTIES, MONTANA: MONTANA BUREAU OF MINES AND GEOLOGY MEMOIR 10, P. 22.

General comments

Subject category Comment text
Deposit Discovery Year: LATE 1870'S
General PATENTED CLAIMS INCLUDE: MODOC CHIEF, DIAMOND HILL, GOLD HILL, GOLD HILL FRACTION, CROWN HILL, PRIMROSE LODE, CROWN HILL FRACTION, DIAMOND, PEACOCK, CARRIBOO, CARBONATE, WHALE.
Deposit ?NORTH-TRENDING METAMORPHOSED ZONE CUT BY ERRATICALLY DISTRIBUTED BUT ABUNDANT SEAMS AND IRREGULAR STINGERS, PIPELIKE SHOOTS, AND DISTINCT VEINS? (KLEPPER AND OTHERS, 1971)

Reporter information

Type Date Name Affiliation Comment
Reporter 01-MAY-1976 Krohn, Douglas H. U.S. Geological Survey

Beyond USGS

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

External references

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