Buckley Field Manganese Deposits

The Buckley Field Manganese Deposits is a mine located in Arapahoe county, Colorado at an elevation of 5,801 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: Buckley Field Manganese Deposits

Commodity

Tertiary: Manganese

Location

State: Colorado
County: Arapahoe
District: Watkins Area

Land Status

Land ownership: State
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

Not available

Ownership

Not available

Production

Not available

Deposit

Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Interior Plains
Physiographic Province: Great Plains Province
Physiographic Section: Colorado Piedmont

Mineral Deposit Model

Not available

Orebody

Form: IRREGULAR

Structure

Type: R
Description: Denver Basin

Type: L
Description: Denver Basin

Alterations

Not available

Rocks

Name: Sandstone
Role: Host
Age Type: Host Rock
Age Young: Paleocene

Analytical Data

Analytical Data: BUCKLEY NO. 2 SAMPLES ASSAYED 10.5 % MN, 73.8 % INSOL, 59.2 % SIO2, 1.5 % FE, 0.6 % CAO, LT 0.05 % S, 3.3 % BA, 7.0 % AL203, 0.20 % ZN, 0.03 % P.
Analytical Data: BUCKLEY NO. 1 SAMPLE ASSAYED 12.2 % MN, 68.3 % INSOL, 55.0 % SIO2, 0.9 % FE, 1.5 % CAO, LT 0.05 % S, 3.2 % BA, 7.8 % AL203, 0.25 % ZN, 0.05 % P.
Analytical Data: SIZING OF CRUSHED COMPOSITE SAMPLE GAVE MN DISTRIBUTION OF 77.7 % IN PLUS 10-MESH AND 22.3 % IN MINUS 10-MESH.
Analytical Data: SINTERING TEST YIELDED 48.4 % MN, 1.9 % FE, 9.2 % SIO2, 3.4 % AL203, 1.2 % CAO, 0.1 % ZN, 0.056 % P, 11.0 % BA.
Analytical Data: STAGE CRUSHING TEST ON 0
Analytical Data: COMPOSITE OF BUCKLEY NOS. 1 AND 2 AND ONE FROM LEONARD MINE (DOUGLAS CO.) ASSAYED 11.1 % MN, 71.4 % INSOL, 56.7 % SIO2, 1.2 % FE, 1.3 % CAO, LT 0.05 % S, 3.0 % BA, 8.0 % AL203, 0.23 % ZN, 0.03 % P.
Analytical Data: COMPOSITE SAMPLE CRUSHED TO MINUS 10-MESH, STAGE-GROUND THRU 48-MESH, SIZED AND TABLED GAVE MN DISTRIBUTION OF 57.2 % IN FIRST CONCENTRATE (14.0 WT % ASSAYING 42.8 % MN AND 7.6 % SIO2), 15.7 % IN SECOND CONCENTRATE (4.1 WT % ASSAYING 40.1 % MN AND 10.2 % SIO2), 9.9 % IN MIDDLING (6.9 WT % ASSAYING 15.0 % MN AND 53.3 % SIO2), 4.9 % IN SLIMES (7.4 WT % ASSAYING 7.0 % MN AND 50.2 % SIO2), 12.3 % IN TAILING (67.6 WT % ASSAYING 1.9 % MN AND 73.0 % SIO2).

Materials

Ore: Psilomelane
Gangue: Barite
Gangue: Limonite

Comments

Comment (Workings): TRAVER STATES THAT OF THE SIX DEPOSITS FOUND, TWO WERE EXPLORED BY 21 TEST PITS 4 TO 9 FT DEEP, 8 TRENCHES 10 TO 31 FT LONG, AND 116 POST HOLES 0.5 TO 3.5 FT DEEP

Comment (Deposit): DENVER BASIN MN OCCURRENCES WERE CONSIDERED TOO LOW GRADE FOR COMMERCIAL MANUFACTURE OF FERROMANGANESE BUT USBM ORE-DRESSING TESTS INDICATED SOME DEGREE OF CONCENTRATION POSSIBLE BY SIZING METHODS AND BY SIMPLE TABLING AND SINTERING. FLOTATION INCREASED MN RECOVERY BUT LOWERED GRADE DUE TO EXCESS SILICA AND BARIUM ; INFO.SRC : 1 PUB LIT

Comment (Commodity): OTHER UNSPECIFIED MN OXIDES PRESENT IN SMALL AMOUNTS

Comment (Development): ONE OF SEVERAL DENVER BASIN DEPOSITS INVESTIGATED BY USBM AND USGS FOR MN POTENTIAL AS RESULT OF STRATEGIC MINERALS ACT AND WW II NEEDS. NO COMMERCIAL QUANTITIES DISCLOSED AT THAT TIME

Comment (Location): LOCATION WITHIN BOBING RANGE UNCERTAIN. LAT-LONG GIVEN IS APPROX. CENTER OF BOMBING RANGE ; INFO FROM LAND.ST :(1974)

Comment (Deposit): MN OXIDES OCCUR AS IRREGULAR MASSES 20 TO 200 MESH IN SIZE FILLING INTERSTICES OF ARKOSIC SANDSTONE POSSIBLY IN DENVER FM BUT MORE LIKELY IN DAWSON FM

References

Reference (Deposit): TRAVER, W.M., JR., 1947, INVESTIGATIONS OF STRATEGIC MINERAL RESOURCES, IN VANDERWILT, J.W., MINERAL RESOURCES OF COLORADO: COLORADO STATE MINERAL RESOURCES BOARD, P. 490-491.

Reference (Deposit): BRYANT, BRUCE, AND OTHERS, 1981, GEOLOGIC MAP OF THE DENVER 1X2 QUADRANGLE, NORTH-CENTRAL COLORADO: USGS MAP I-1163

Reference (Deposit): WELLS, R.R., AND OTHERS, 1952, BENEFICIATION OF OXIDE MANGANESE ORES FROM ARAPAHOE, DOUGLAS, SAGUACHE, CUSTER, CHAFFEE, AND PARK COUNTIES, COLORADO: USBM RI-4845, P. 3-6

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