Diamond Hill Mine

The Diamond Hill Mine is a gold mine located in Broadwater county, Montana.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

Satelite View

MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.

Site Name

Primary: Diamond Hill Mine
Secondary: North Zone
Secondary: Glory Hill Zone

Commodity

Primary: Gold
Secondary: Tungsten
Secondary: Bismuth
Secondary: Silver

Location

State: Montana
County: Broadwater
District: Indian Creek District

Land Status

Not available

Holdings

Not available

Workings

Type: Surface/Underground

Ownership

Owner Name: Calim Private Equity LLC
Percent: 100.0

Owner Name: Palmer Engh,
Home Office: Box 231, Townsend, Montana

Production

Year: 1996
Material type: Pegasus Gold Inc 1997 10-K p. 8
Year: 2000
Time Period: 1880-2000
Mined: 760000.000 mt
Material type: ore
Year: 1997
Material type: Pegasus Gold Inc. 1997 10-K pp. 8, 14.

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Skarn Au
Operation Type: Underground
Milling Method: Gravity
Year First Production: 1885
Discovery Year: 1877
Discovery Method: Unknown
Years of Production:
Organization:
Significant: Y
Deposit Size: S

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Northern Rocky Mountains
Physiographic Detail: Elkhorn Mountains

Mineral Deposit Model

Model Name: Skarn Au

Orebody

Form: TABULAR, CHIMNEYLIKE ORE SHOOTS

Structure

Type: R
Description: Boulder Batholith, Lombard Overthrust

Type: L
Description: Aplite And Quartz Diorite Dikes

Alterations

Alteration Type: L
Alteration: SILICIFICATION AND BLEACHING

Rocks

Name: Diorite
Role: Associated
Description: SYENODIORITE; QUARTZ DIORITE
Age Type: Host Rock
Age Young: Late Cretaceous

Name: Diorite
Role: Associated
Description: SYENODIORITE; QUARTZ DIORITE
Age Type: Associated Rock
Age Young: Pliocene

Analytical Data

Not available

Materials

Ore: Pyrite
Ore: Limonite
Ore: Scheelite
Ore: Gold
Ore: Chalcopyrite

Comments

Comment (Deposit): Discovery Year: LATE 1870'S

Comment (Geology): Pegasus Gold 1996 10-K contains a succinct geological description.

Comment (Production): 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.

Comment (Deposit): ?NORTH-TRENDING METAMORPHOSED ZONE CUT BY ERRATICALLY DISTRIBUTED BUT ABUNDANT SEAMS AND IRREGULAR STINGERS, PIPELIKE SHOOTS, AND DISTINCT VEINS? (KLEPPER AND OTHERS, 1971)

Comment (Geology): ?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).

Comment (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

Comment (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.

Comment (Workings): 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.

Comment (Reserve-Resource): 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.

References

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

Reference (Production): USBM IC 7592

Reference (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

Reference (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.

Principal Gold Districts of Montana

In Montana, 54 mining districts have each have produced more than 10,000 ounces of gold. The largest producers are Butte, Helena, Marysville, and Virginia City, each having produced more than one million ounces. Twenty seven other districts are each credited with between 100,000 and one million ounces of gold production. Read more: Principal Gold Districts of Montana.