Boomer Mine

Past Producer in Park county in Colorado, United States with commodities Beryllium, Silver, Uranium, Molybdenum, Tungsten, Lead, Zinc, Copper, Arsenic, Iron, Tin

Sections on this page

Identification information
Geographic coordinates
Site location context
Geographic areas
Public Land Survey System information
Commodities
Materials information
Alteration
Host and associated rocks
Nearby scientific data
Geologic structures
Ore body information
Controls for ore emplacement
Economic information about the deposit and operations
Mining district
Land status
Ownership information
Production statistics
Workings at the site
Links to other databases
Bibliographic references
General comments
Reporter information

Geologic information

Identification information

Deposit ID	10013786
MRDS ID	D010271
Record type	Site
Current site name	Boomer Mine
Alternate or previous names	Outhouse Lode, Mammoth Lode, Florman Shaft, East Boomer
Related records	10118501

Geographic coordinates

Geographic coordinates:	-105.44891, 39.07639 (WGS84)
Elevation	2617
Relative position	8.2 MILES N 35 W OF LAKE GEORGE (TOWN)

Site location context

Political divisions (FIPS codes)

Park(county)

Colorado(state)

United States(country)

North America(continent)

Land(continent)

USGS map quadrangles

Tarryall(quadrangle 1:24,000 scale)

Bailey(quadrangle 1:100,000 scale)

Denver(quadrangle 1:250,000 scale)

Hydrologic units (watersheds)

South Platte Headwaters(hydrologic unit)

South Platte(hydrologic accounting unit)

South Platte(hydrologic subregion)

Missouri(hydrologic region)

Federal lands

Pike and San Isabel National Forests(National Forest)

National Forest FS(Type of land area)

FS(Federal land areas administered by FS)

Geographic areas

Country	State	County
United States	Colorado	Park

Public Land Survey System information

Meridian	Township	Range	Section	Fraction	State
6th Principal	011S	072W	21	N2 OF NE OF NE OF SW	Colorado

Comments on the location information

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

Commodities

Commodity	Importance
Beryllium Critical	Primary
Silver	Secondary
Uranium	Secondary
Molybdenum	Secondary
Tungsten Critical	Secondary
Lead	Tertiary
Zinc Critical	Tertiary
Copper	Tertiary
Arsenic Critical	Tertiary
Iron	Tertiary
Tin Critical	Tertiary

Comments on the commodity information

NONPEGMATITIC BERYLLIUM DEPOSITS; BERYL OCCURS AS HEXAGONAL CRYSTALS AND MASSIVE POIKILOBLASTIC GRANS.

Materials information

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

Alteration

(Local) Greisenization

Analytical data

Result	MASSES OF GALENA CONTAIN 0.3-0.7 % AG, 0.3-1.5 % BI, 0.007-0.7 % CU
Result	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
Result	0.02-0.74 % U308

Host and associated rocks

Host or associated

Associated

Rock type

Plutonic Rock > Granitoid > Granite

Rock unit name

Redskin Granite

Rock description

Redskin Granite

Stratigraphic age (youngest)	Neoproterozoic
Stratigraphic age (youngest)	Neoproterozoic
Stratigraphic age (youngest)	Neoproterozoic

Host or associated Host

Rock type Metamorphic Rock > Gneiss
Host or associated Host

Rock type Metamorphic Rock > Amphibolite
Host or associated Host

Rock type Plutonic Rock > Pegmatite
Host or associated Host

Rock type Plutonic Rock > Granitoid > Granite

Rock unit name Idaho Springs Formation

Rock description Idaho Springs Formation

Host or associated	Host
Rock type	Metamorphic Rock > Gneiss

Host or associated	Host
Rock type	Metamorphic Rock > Amphibolite

Host or associated	Host
Rock type	Plutonic Rock > Pegmatite

Host or associated	Host
Rock type	Plutonic Rock > Granitoid > Granite
Rock unit name	Idaho Springs Formation
Rock description	Idaho Springs Formation

Nearby scientific data

(1)	Biotitic gneiss, schist, and migmatite	ListMap

Economic information

Geologic structures

Type of structure	Regional
Structure description	Tarryall Mountains, Front Range, Puma Hills, Badger Flats
Type of structure	Local
Structure description	Badger Flats Fault, Minor Faults (Especially Steeply-Dipping Ne- And Nw-Trending Faults), Round Mountain Syncline, Boomer Cupola, Boomer Vein

Ore body information

General form CUPOLAS, PODS, IRREGULAR LENSES

Depth to bottom 45.72M
General form CUPOLAS, PODS, IRREGULAR LENSES

General form	CUPOLAS, PODS, IRREGULAR LENSES
Depth to bottom	45.72M

General form	CUPOLAS, PODS, IRREGULAR LENSES

Controls for ore emplacement

Greisenized Rocks; Deposits Localized By Fissures (Especially Ne- And Nw-Trending Fracture Sets), Contacts, Favorable Rock Units; Boomer Vein

Economic information about the deposit and operations

Development status	Past Producer
Commodity type	Metallic
Deposit size	Small
Significant	No
Discovery year	1895
Year of first production	1895
Year of last production	1965

Mining district

District name	Lake George (Badger Flats) Beryllium Area (Mountain Dale District)

Land status

Ownership category	Private

Ownership information

Type Operator

Owner U.S. Beryllium Corp.

First year 1963
Type Owner

Owner The Boomer Mining Co.

First year 1982

Type	Operator
Owner	U.S. Beryllium Corp.
First year	1963

Type	Owner
Owner	The Boomer Mining Co.
First year	1982

Production statistics

Year 1957

Description Ap_Grade: ^10.2 % Beo

Importance Item Commodity Group Amount recovered Grade Recovery percentage

Major Beryllium Beryllium 10wt-pct
Year 1959

Description Ap_Grade: ^6.6 % Beo

Importance Item Commodity Group Amount recovered Grade Recovery percentage

Major Ore Beryllium Beryllium 7wt-pct
Year 1960

Description Ap_Grade: ^2-4 % Beo

Importance Item Commodity Group Amount recovered Grade Recovery percentage

Major Ore Beryllium Beryllium 3wt-pct
Year 1960

Description Ap_Grade: ^About 5 % Beo

Importance Item Commodity Group Amount recovered Grade Recovery percentage

Major Ore Beryllium Beryllium 5wt-pct
Year 1960

Description Ap_Grade: ^About 8 % Beo

Importance Item Commodity Group Amount recovered Grade Recovery percentage

Major Ore Beryllium Beryllium 8wt-pct
Year 1961

Description Ap_Grade: ^3.37 % Beo

Importance Item Commodity Group Amount recovered Grade Recovery percentage

Major Ore Beryllium Beryllium 3wt-pct
Year 1962

Description Ap_Grade: ^3.0 % Beo

Importance Item Commodity Group Amount recovered Grade Recovery percentage

Major Ore Beryllium Beryllium 3wt-pct
Year 1965

Period 1956-1965

Description Cp_Grade: ^2-11.2 % Beo

Importance Item Commodity Group Amount recovered Grade Recovery percentage

Major Ore Beryllium Beryllium 7wt-pct

Comments on the production information

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

Workings at the site

Type of workings Surface/Underground

Area 1.199HA

Length 649.22M

Overall depth 56.39M

Overall length 115.82M

Overall width 109.73M

Type of workings	Surface/Underground
Area	1.199HA
Length	649.22M
Overall depth	56.39M
Overall length	115.82M
Overall width	109.73M

Comments on the workings information

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

Comments on 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.

Reference information

Links to other databases

Agency	Database name	Acronym	Record ID	Notes
USGS	Mineral Resources Data System	MRDS	D010271
U.S. Bureau of Mines	Minerals Availability System	MAS	0080930067

Bibliographic references

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.
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.
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.
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.
Deposit

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

WORCESTER, P.G., 1919, MOLYBDENUM DEPOSITS OF COLORADO: CGS BULLETIN 14, P. 73-74.
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.
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
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.
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
Production

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

General comments

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

Subject category

Comment text

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.

Deposit

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

Reporter information

Type	Date	Name	Affiliation	Comment
Reporter	01-MAR-1983	Collins, Donna B.	Colorado Geological Survey

Beyond USGS

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

External references

Wikidata: Q49401527 (Boomer Mine)

Maps centered on this site

Authoritative Colorado resources

These are landing pages for further research — the state agencies don't currently expose per-mine deep links.