Boomer Mine

The Boomer Mine is a beryllium mine located in Park county, Colorado at an elevation of 8,586 feet.

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

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Site Name

Primary: Boomer Mine
Secondary: Outhouse Lode, Mammoth Lode, Florman Shaft
Secondary: East Boomer

Commodity

Primary: Beryllium
Secondary: Silver
Secondary: Uranium
Secondary: Molybdenum
Secondary: Tungsten
Tertiary: Copper
Tertiary: Lead
Tertiary: Zinc
Tertiary: Arsenic
Tertiary: Iron
Tertiary: Tin

Location

State: Colorado
County: Park
District: Lake George (Badger Flats) Beryllium Area (Mountain Dale District)

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.

Holdings

Not available

Workings

Type: Surface/Underground

Ownership

Owner Name: U.S. Beryllium Corp.
Years: 1963 -

Owner Name: The Boomer Mining Co.
Years: 1982 -

Production

Year: 1965
Time Period: 1956-1965
Description: Cp_Grade: ^2-11.2 % Beo
Year: 1961
Description: Ap_Grade: ^3.37 % Beo
Year: 1960
Description: Ap_Grade: ^2-4 % Beo
Year: 1960
Description: Ap_Grade: ^About 5 % Beo
Year: 1959
Description: Ap_Grade: ^6.6 % Beo
Year: 1957
Description: Ap_Grade: ^10.2 % Beo
Year: 1962
Description: Ap_Grade: ^3.0 % Beo
Year: 1960
Description: Ap_Grade: ^About 8 % Beo

Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Year First Production: 1895
Year Last Production: 1965
Discovery Year: 1895
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains

Mineral Deposit Model

Not available

Orebody

Form: CUPOLAS, PODS, IRREGULAR LENSES

Form: CUPOLAS, PODS, IRREGULAR LENSES

Structure

Type: R
Description: Tarryall Mountains, Front Range, Puma Hills, Badger Flats

Type: L
Description: Badger Flats Fault, Minor Faults (Especially Steeply-Dipping Ne- And Nw-Trending Faults), Round Mountain Syncline, Boomer Cupola, Boomer Vein

Alterations

Alteration Type: L
Alteration Text: Greisenization

Rocks

Name: Granite
Role: Associated
Age Type: Associated Rock
Age Young: Neoproterozoic

Name: Granite
Role: Associated
Age Type: Host Rock Unit
Age Young: Neoproterozoic

Name: Granite
Role: Associated
Age Type: Associated Rock Unit
Age Young: Neoproterozoic

Analytical Data

Analytical Data: 0.02-0.74 % U308
Analytical Data: SAMPLES TAKEN IN 1959-1969 CONTAIN: 0.00015-6.2 % BE, 0.00015-0.015 % AG, 0.0007-3 % CU, L.T. 0.005-0.015 % GE, 0.009-0.12 % LI, 0.0007-0.03 % MO, 0.002-0.15 % NB, 0.003-G.T. 10 % PB, 0.0015-0.03 % SN, 0-G.T. 10 % W, 0.007-1.5 % ZN
Analytical Data: MASSES OF GALENA CONTAIN 0.3-0.7 % AG, 0.3-1.5 % BI, 0.007-0.7 % CU

Materials

Ore: Galena
Ore: Bertrandite
Ore: Wolframite
Ore: Pyrite
Ore: Sphalerite
Ore: Beryl
Ore: Euclase
Ore: Cassiterite
Ore: Uraninite
Ore: Covellite
Ore: Chalcopyrite
Ore: Molybdenite
Ore: Silver
Gangue: Muscovite
Gangue: Quartz
Gangue: Siderite
Gangue: Fluorite
Gangue: Topaz

Comments

Comment (Deposit): THE REDSKIN STOCK IS ZONED, WITH NEARLY ALL OF THE BERYLLIUM DEPOSITS OCCURRING IN THE GRANITE-APLITE OR PORPHYRITIC GRANITE FACIES OF THE GREISENIZED REDSKIN GRANITE. EVEN THOSE DEPOSITS NOT ACTUALLY IN THE REDSKIN GRANITE ARE SPATIALLY AND GENETICALLY RELATED TO IT. AT THE BOOMER MINE NEARLY ALL ORE WAS FOUND ABOVE 8500 FT IN ALTITUDE. THE DEPOSIT LIES NEAR THE SOUTH CONTACT OF THE BOOMER CUPOLA. BERYL IS DOMINANT IN ALL ORE BODIES EXCEPT OUTHOUSE LODE WHERE BERTRANDITE PREDOMINATES. ALTHOUGH ORE BODIES ARE APPARENTLY SEPARATE, IT SEEMS CERTAIN THAT THEY "ACTUALLY INTERCONNECTED AND FORM ONE LARGE COMPLEX BODY LOCALIZED BY THE COMBINED INFLUENCE OF THE BOOMER VEIN, FRACTURES OF THE STEEP NORTHEAST-TRENDING SET, AND THE SOUTHERN CONTACT OF THE BOOMER CUPOLA". AT LEAST TWO PIPES ARE EXPOSED IN THE HANGING WALL OF THE BOOMER VEIN.

Comment (Deposit): THIS IS THE MOST IMPORTANT AND LARGEST DEPOSIT FOUND IN THE AREA SO FAR. ; INFO.SRC : 1 PUB LIT

Comment (Location): BETWEEN ALEXANDER DRAW AND O'BRIEN GULCH ON EAST EDGE OF BADGER FLATS. ; INFO FROM LAND.ST :(1976)

Comment (Commodity): NONPEGMATITIC BERYLLIUM DEPOSITS; BERYL OCCURS AS HEXAGONAL CRYSTALS AND MASSIVE POIKILOBLASTIC GRANS.

Comment (Production): BOOMER MINE HAS PROBABLY PRODUCED MORE BERYLLIUM ORE THAN ANY OTHER MINE IN U.S.; SOME ORE, INCLUDING HIGH-GRADE MATERIAL, WAS STOCKPILED AND NOT INCLUDED IN ABOVE FIGURES

Comment (Development): ORIGINALLY LOCATED AS A SILVER PROSPECT; IN 1917 MINE WAS CONSIDERED A MOLYBDENUM PROSPECT (BUT NO KNOWN PRODUCTION); IN 1955 MINE REHABILITATED AS URANIUM PROSPECT; 1956 BEGAN PRODUCING BERYLLIUM; CLAIMS PATENTED IN 1905.

Comment (Workings): ONE MAIN SHAFT AND SHORT, IRREGULAR LEVELS INTERCONNECTED BY OPEN STOPES, RAISES, OPENCUTS, SMALL GLORY HOLES. MAIN LEVELS AT 8556, 8533, 8516, 8494, 8486, 8440, 8398 FT; SEVERAL LESSER SHAFTS

References

Reference (Deposit): HAWLEY, C.C., 1969, GEOLOGY AND BERYLLIUM DEPOSITS OF THE LAKE GEORGE (OR BADGER FLATS) BERYLLIUM AREA, PARK AND JEFFERSON COUNTIES, COLORADO: USGS PROFESSIONAL PAPER 608-A, 44 P.

Reference (Deposit): MEEVES, H.C., 1966, NONPEGMATITIC BERYLLIUM OCCURRENCES IN ARIZONA, COLORADO, NEW MEXICO, UTAH, AND FOUR ADJACENT STATES: USBM REPORT OF INVESTIGATIONS 6828, P. 25-34.

Reference (Deposit): HAWLEY, C.C. AND GRIFFITTS, W.R., 1968, DISTRIBUTION OF BERYLLIUM, TIN, AND TUNGSTEN IN THE LAKE GEORGE AREA, COLORADO: USGS CIRCULAR 597, 18 P.

Reference (Deposit): HAWLEY, C.C. AND WOBUS, R.A., 1977, GENERAL GEOLOGY AND PETROLOGY OF THE PRECAMBRIAN CRYSTALLINE ROCKS, PARK AND JEFFERSON COUNTIES, COLORADO: USGS PROFESSIONAL PAPER 608-B, 77 P.

Reference (Deposit): SIEMS, P.L., 1963, BERYLLIUM: COLORADO SCHOOL OF MINES MINERAL INDUSTRIES BULLETIN, V. 6, NO. 3, 15 P.

Reference (Deposit): WORCESTER, P.G., 1919, MOLYBDENUM DEPOSITS OF COLORADO: CGS BULLETIN 14, P. 73-74.

Reference (Deposit): SHARP, W.N. AND HAWLEY, C.C., 1960, BERTRANDITE-BEARING GREISEN, A NEW BERYLLIUM ORE, IN THE LAKE GEORGE DISTRICT, COLORADO, IN SHORT PAPERS IN THE GEOLOGICAL SCIENCES: USGS PROFESSIONAL PAPER 400-B, P. B73-B74.

Reference (Deposit): HAWLEY, C.C., SHARP, W.N., GRIFFITTS, W.R.,1960, PRE-MINERALIZATION FAULTING IN THE LAKE GEORGE AREA, PARK COUNTY, COLORADO, IN, SHORT PAPERS IN THE GEOLOGICAL SCIENCES: USGS PROFESSIONAL PAPER 400-B, P. B71-B73

Reference (Deposit): GALLAGHER, G.L., 1976, URANIUM FAVORABILITY OF PRECAMBRIAN ROCKS IN THE BADGER FLATS-ELKHORN THRUST AREA, PARK AND TELLER COUNTIES, COLORADO: USERDA REPORT GJBX-55(76), 30 P.

Reference (Deposit): NELSON-MOORE, J.L., COLLINS, D.B. AND HORNBAKER, A.L., 1978, RADIOACTIVE MINERAL OCCURRENCES OF COLORADO AND BIBLIOGRAPHY: CGS BULLETIN 40, P. 365

Reference (Production): HAWLEY, C.C. (1969); SIEMS, P.L. (1963)

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