Black Cloud Mine

The Black Cloud Mine is a lead and zinc mine located in Lake county, Colorado at an elevation of 11,499 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

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: Black Cloud Mine
Secondary: Leadville Unit
Secondary: Resurrection Mine 0080650339
Secondary: Irene Shaft
Secondary: Yak Tunnel

Commodity

Primary: Lead
Primary: Zinc
Tertiary: Copper
Tertiary: Gold
Tertiary: Silver

Location

State: Colorado
County: Lake
District: Leadville

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

Type: Patented
Type: Private Lease
Type: Located Claim

Workings

Type: Underground

Ownership

Owner Name: Newmont Mining - Resurrection Mining Co. Subsidiary
Company ID: 500516
Percent: 50.00
Home Office: New York
Info Year: 1976

Owner Name: Asarco (American Smelting And Refining Co.)
Company ID: 500516
Percent: 50.00
Home Office: Idaho
Info Year: 1976

Owner Name: Resurrection Mining Co. (Newmont Corp)
Percent: 40.00
Home Office: Colorado
Info Year: 1996

Owner Name: Asarco (American Smelting And Refining Co.)
Percent: 60.00
Home Office: Colorado
Info Year: 1996

Production

Year: 1974
Description: 5,800 11,600 10,300 214 148000 Mt Milled
Year: 1973
Description: 6,500 13,700 14,200 343 180000 Mt Milled
Year: 1972
Description: 6,700 12,000 12,500 255 188000 Mt Milled
Year: 1971
Description: 3,600 6,800 6,990 267 110000 Mt Milled
Year: 1
Description: Pb, Mt Zn, Mt Ag, Kg Au, Kg
Description: Metals Produced
Year: 1983
Description: 6,000 12,500 11,500 316 193000 Mt Milled
Year: 1982
Description: 6,200 11,300 10,500 380 193000 Mt Milled
Year: 1981
Description: 6,700 11,900 11,100 328 190000 Mt Milled
Year: 1980
Description: 6,800 11,200 10,100 355 183000 Mt Milled
Year: 1979
Description: 5,400 8,700 8,340 301 158000 Mt Milled
Year: 1978
Description: 6,200 11,300 9,600 249 172000 Mt Milled
Year: 1977
Description: 6,800 10,500 9,640 417 169000 Mt Milled
Year: 1976
Description: 6,600 13,200 10,400 277 181000 Mt Milled
Year: 1975
Description: 6,800 12,800 10,900 384 184000 Mt Milled
Year: 1995
Description: Silver Recovered 11832700 Gm
Year: 1995
Description: Lead Recovered 4536 Mt
Year: 1995
Description: Zinc Recovered 13971 Mt
Year: 1995
Description: Ore Milled 199000 Mt
Year: 1994
Description: Ore Milled 202000 Mt
Year: 1993
Description: 4,900 13,900 10,500 414 199000 Mt Milled
Year: 1992
Description: 5,300 14,800 10,500 426 205000 Mt Milled
Year: 1991
Description: 5,800 13,400 9,950 413 207000 Mt Milled
Year: 1990
Description: 4,900 12,900 9,180 311 197000 Mt Milled
Year: 1989
Description: 4,500 13,000 10,500 249 185000 Mt Milled
Year: 1988
Description: 6,400 13,500 10,000 336 197000 Mt Milled
Year: 1987
Description: 7,000 13,000 9,330 519 198000 Mt Milled
Year: 1986
Description: 6,800 13,200 12,200 550 200000 Mt Milled
Year: 1985
Description: 6,100 12,100 10,700 535 197000 Mt Milled
Year: 1984
Description: 6,100 13,200 11,300 558 194000 Mt Milled

Deposit

Record Type: Site
Operation Category: Producer
Operation Type: Underground
Mining Method: Filled Stopes - Other Filled Stope Methods
Milling Method: Flotation
Year First Production: 1971
Years of Production:
Organization:
Significant: Y

Physiography

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

Mineral Deposit Model

Not available

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Unknown: Chalcopyrite
Unknown: Dolomite
Unknown: Galena
Unknown: Gold
Unknown: Pyrite
Unknown: Quartz
Unknown: Siderite
Unknown: Sphalerite

Comments

Comment (Deposit): BLACK CLOUD MINE - LEADVILLE UNIT ASARCO - JOINT VENTURE OPERATOR: AMERICAN SMELTING AND REFINING COMPANY EXPLORATION: THE PROPERTY WAS EXPLORED FROM 1950 TO 1960, INITIAL WORK WAS DONE BY CORE DRILLING. ONGOING EXPLORATION IS GENERALLY DONE BY LONG HOLE. ROCK: THE DENSITY OF THE IN PLACE ORE IS ABOUT 3.7 GM/CM3. MINING: VENTILATION INTAKE IS VIA THE ECLIPSE SHAFT, EX- HAUST IS VIA THE IRENE AND BLACK CLOUD SHAFTS. THE YAK TUNNEL IS PARTLY ACCESSIBLE THROUGH OLD WORKINGS AROUND THE IRENE SHAFT. PROPERTY UPDATED NOVEMBER 1990. MINE DUE TO BE SHUT DOWN ON DECEMBER 31,1996 DUE TO DEPRESSED PB ZN PRICES-AMM OCT 24, 1996. MINE WAS NOT SHUT DOWN BUT REMAINED OPEN. PRICES INCREASED. MAS HAS TWO MILL PROPERTY FILES FOR THIS PROPERTY: BLACK CLOUD MILL MAS SEQ 0080650123 AND LEADVILLE UNIT MILL 0080650254:

Comment (Reserve-Resource): RESERVES GIVEN ON BASIS OF 181,400 MT/Y, 6 YR LIFE, 85% MINE RECOVERY. M9C4=M1C1

Comment (Reserve-Resource): RESERVE DATA FROM SEC FORM 10-K REPORT, 12/31/93, PP. A16-A18. OTHER NAMES: IRENE SHAFT, LEADVILLE UNIT; RESURRECTION MINE (HAS SEQ# 0080650339), ND YAK TUNNEL. 1993 ALSO HAD 2.4 G/MT AU, AND .15% CU.

Comment (Production): PRODUCTION DATA IS FROM ASARCO ANNUAL REPORTS AND SEC FORM 10-K REPORTS.

Comment (Ownership): NEWMONT MINING THROUGH RESURRECTION-MINING SUBSIDIARY OWNS 46.9% PERCENT OF BLACK CLOUD PROPERTY. RANDOL, 1996/97; NEW OWNERSHIP DATA. RESURRECTION OWNES 40%.

References

Reference (Deposit): LOUGHLIN, G.F., 1918, THE OXIDIZED ZINC ORES OF LEADVILLE,

Reference (Deposit): COLORADO: USGS BULL. 681, 91P.

Reference (Deposit): LOUGHLIN, G.F. AND BEHRE, C.H. JR., 1933, LEADVILLE MINING D

Reference (Deposit): IN COLORADO: 16TH INT. GEOL. CONG., GUIDEBOOK 19 P. 77-91

Reference (Deposit): -------, 1942, LEADVILLE DISTRICT, COLORADO IN NEWHOUSE, W.H

Reference (Deposit): ORE DEPOSITS AS RELATED TO STRUCTURAL FEATURES: PRINCETON

Reference (Deposit): PRESS, P. 203-206.

Reference (Deposit): -------, 1947, LEADVILLE MINING DISTRICT, LAKE COUNTY IN VAN

Reference (Deposit): MINERAL RES. BD., P. 350-370

Reference (Deposit): TWETO, O., 1968 LEADVILLE DISTRICT, COLORADO IN RIDGE, J.D.

Reference (Deposit): ORE DEPOSITS OF THE UNITED STATES 1933-1967: CHAP. 32, V.

Reference (Deposit): GENTRY,D.W.,LEAD ZINC DEPOSITS IN COCLRADO AND

Reference (Deposit): WYOMING. FINAL REPORT PREPARED FOR U.S. BUREAU OF MINES.

Reference (Deposit): CONTRACT AGREEMENT G.O. 264005,1976.

Reference (Deposit): MORTENSEN,D.K.,FORMER MILL SUPERINTENDANT (BLACK CLOUD

Reference (Deposit): MINE).'LEADVILLE AGAIN',PAPER TO BE REPRESENTED TO THE

Reference (Deposit): INTERMOUNTAIN MINERALS CONFERENCE, AIME,COLORADO.JULY1971.

Reference (Deposit): INFORMATION REPORT, LEADVILLE UNIT-ASARCO (BLACK CLOUD)

Reference (Deposit): BUREAU OF MINES,DEPARTMENT OF NATURAL RESOURCES,STATE OF

Reference (Deposit): COLORADO.CONFIDENTIAL INFORMATION IN IFOC FILES. YEARS

Reference (Deposit): 1970 THROUGH 1977.

Reference (Deposit): GALENA, LEADVILLE: ECON. GEOL., V. 28, P. 678-685

Reference (Deposit): DAVIDSON, R.N.,1950, HYDROTHERMAL ALTERATION, EFFECTS IN THE

Reference (Deposit): VILLE LIMESTONE AND THEIR RELATION TO MINERALIZATION: (ABS

Reference (Deposit): SOC. AMER., V. 61 P. 1551

Reference (Deposit): EMMONS, S.F. AND OTHERS, 1927, GEOLOGY AND ORE DEPOSITS OF T

Reference (Deposit): LEADVILLE MINING DISTRICT, COLORADO: USGS PROF. PAPER 148,

Reference (Deposit): MOSQUITO RANGE AND LEADVILLE, COLORADO: COLO. SCI. SOC. PR

Reference (Deposit): -------,1939, PRELIMINARY GEOLOGICAL REPORT ON THE WEST SLOP

Reference (Deposit): THE MOSQUITO RANGE IN THE VICINITY OF LEADVILLE, COLORADO:

Reference (Deposit): SCI. SOC. PR. V. 14, NO. 2, P. 49-79

Reference (Deposit): -------,1953, GEOLOGY AND ORE DEPOSTS OF THE WEST SLOPE OF T

Reference (Deposit): MOSQUITO RANGE: USGS PROF. PAPER 235, 176P.

Reference (Deposit): CHAPMAN, E.P., 1941,NEWLY RECOGNIZED FEATURES OF MINERAL PAR

Reference (Deposit): GENEIS AT LEADVILLE, COLORADO: AIME TR., V. 144, P. 264-27

Reference (Deposit): CHAPMAN, E.P. AND STEVENS, R.E., 1933, SILVER AND BISMUTH-BE

Reference (Production): DENVER POST-OCTOBER 24. 1996. PP 1C-3C.

Reference (Reserve-Resource): ASARCO 1993 SEC FORM 10-K REPORT, 12/31/93, PP. A16-A19.

Reference (Reserve-Resource): ASARCO 1995 10-K, PP A17-A21

Reference (Deposit): BEHRE, C.H. JR.,1929, REVISION OF STRUCTURE AND STRATIGRAPHY

Reference (Deposit): NO. 3,P. 37-57

Reference (Deposit): -------,1932, THE WESTON PASS MINING DISTRICT, LAKE AND PARK

Reference (Deposit): COUNTIES, COLORADO: COLO. SCI. SOC. PR. V. 13, NO. 3, P. 5

Reference (Production): ASARCO 1995 10-K, PP A17-A21 93,94,95

Reference (Deposit): DENVER POST-OCTOBER 24. 1996. PP1C-3C.

Reference (Deposit): THE MINING RECORD, VOL., 107, #45, NOV., 6, 1996, P3.

Reference (Deposit): RANDOL MINING DIRECTORY, 1996/97, MINES & MINING COMPANIES,

Reference (Deposit): PP. 170, 176.

Reference (Deposit): THE MINING RECORD, VOL., 107, #51, DEC., 18, 1996, P1.

Reference (Deposit): PAYDIRT, FEB., 1997, #692, P14.

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