Sheep Creek Deposit

The Sheep Creek Deposit is a copper and cobalt mine located in Meagher county, Montana at an elevation of 5,899 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: Sheep Creek Deposit

Commodity

Primary: Copper
Primary: Cobalt
Secondary: Silver

Location

State: Montana
County: Meagher

Land Status

Land ownership: Mixed
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: Located Claim
Type: Patented
Type: Private Lease

Workings

Not available

Ownership

Owner Name: Cominco Resources And Utah International Jv
Percent: 100.0
Info Year: 1988

Owner Name: Cominco Resources
Percent: 100.0
Info Year: 1995

Production

Not available

Deposit

Record Type: Site
Operation Category: Prospect
Deposit Type: Massive sulfide
Operation Type: Surface-Underground
Mining Method: Unknown
Discovery Year: 1985
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: Y

Physiography

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

Mineral Deposit Model

Not available

Orebody

Name: Lower Zone (see Geology comments)
Form: Tabular to ovoid

Name: Upper Zone
Form: Tabular to ovoid

Structure

Not available

Alterations

Alteration Type: L
Alteration: silicification

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Bornite
Ore: Chalcopyrite
Gangue: Barite
Unknown: Pyrite

Comments

Comment (Ownership): COMINCO GAINED FULL OWNERSHIP POSSIBLY SOMETIME IN 1993.

Comment (Exploration): TintinaGold Resources Inc. holds ~5,775 acres in mining leases on private land plus 56 mining claims.Drilling: Hole From (m) To (m) Width (m) Width (ft) Cu % Co % Upper Copper Zone DDH SC10-001 118.26 125.00 6.74 22.1 3.44 0.18 DDH SC10-002 131.31 138.77 7.46 24.5 2.48 0.36 DDH SC10-003 131.88 139.50 7.62 25.0 3.21 0.17 DDH SC10-004 107.90 118.41 10.51 34.5 3.03 0.15 Lower Copper Zone DDH SC10-003 350.02 351.69 1.67 5.6 3.24 0.05 DDH SC10-004 414.00 418.05 4.05 13.3 10.84 0.03

Comment (Exploration): Cominco states that recovery tests on ore from the Lower Zone have been very good, but tests of recoveries from the Upper Zone have been disappointing (190). Drill intersects from the Lower Zone include 20 ft grading 11% Cu and 6 ft grading 12% Cu.

Comment (Exploration): Quote from TintinaGold: The first four holes drilled encountered a shallow tabular zone of copper-rich zone, (the ?Upper Copper Zone‟), with bands of massive chalcopyrite concentrated within a fine grained massive pyritic sulfide layer in a shale and debris flow conglomerate host (see Figure 2 through Figure 6, below). In addition, deeper drilling in SC10-003, SC10-004 and SC10-005 encountered a deeper zone, (the ?Lower Copper Zone‟), with high concentrations of copper and cobalt in sulfide layers. SC10-005 lies 570 meters east of SC10-004, and in an area where the Upper Copper Zone is eroded away. Drilling has begun on SC10-006 and targets additional mineralization situated 2.3 kilometers southeast of SC10-005.

Comment (Geology): Upper Zone: Length 2,600 ft., thickness 9 to 43 ft., width 1,300, depth to ore 350 ft. avg. Lower Zone: Length >2,600 ft., thickness 8 to 41 ft., depth to ore 1,161 to 1,357 ft.

Comment (Reserve-Resource): TintinaGold Resources reports NI 43-101 compliant resources of "The Upper Copper Zone at Sheep Creek contains an Inferred resource of 7 MMT grading 2.4% Cu, 0.12% Co, and 12.3 g/tonne Ag at a 1.5% Cu cut-off grade based on an assumed copper price of $2.50/lb." (Cutoff grade 1.5%) At a cutoff grade of 0.75% Cu + 8,677,000 metric tons 2.15% Cu, 0.11% Co, 12.1 G/g Ag.

Comment (Geology): Ore found along bedding, with some crosscutting sulfides.

Comment (General): This is probably a better record for Sheep Creek than Dep_ID 10048815. It has newer and more complet information, but that one has been tagged significant by someone else. I also tagged this as significant.

References

Reference (Deposit): COMINCO RESOURCES INTERNATIONAL, 1993 ANNUAL REPORT, P6.

Reference (Deposit): COMINCO LTD. 1993 ANNUAL REPORT, P35.

Reference (Deposit): Cominco Resources Reports High Grade Copper Intercept. June 6, 1988.

Reference (Reserve-Resource): COMINCO LTD. 1995 ANNUAL REPORT, P37.

Reference (Deposit): Cominco Resources International Limited. Fact Sheet Sheep Creek, Montana. May 1989.

Reference (Deposit): Cominco Resources Reports Encouraging Results at Sheep Creek, Montana, Copper Cobalt Property. July 14, 1987.

Reference (Deposit): Cominco American Resources Incorporated BHP Utah International Incorporated. Sheep Creek Project, Meagher County, Montana. Dec. 1988, 4 pp.

Reference (Reserve-Resource): TintinaGold Resources Inc., January 6, 2011, TintinaGold reports Initial Inferred copper-cobalt-silver resource on its Sheep Creek property, Montana, USA: TintinaGold Resources Inc. News Release, Web publication accessed January 10, 2011 at, http://tintinagold.com/images/2052TintinaGold%20-%20NR-Sheep%20Creek%20Initial%20Inferred%20Resource-%20Jan-6-2010%20(FINAL)%20.pdf
URL: http://tintinagold.com/images/2052TintinaGold%20-%20NR-Sheep%20Creek%20Initial%20Inferred%20Resource-%20Jan-6-2010%20(FINAL)%20.pdf

Reference (Exploration): Tintagold Resources Inc., November 16, 2010, TintinaGold intersects 8.72% Copper and 0.11% Cobalt over 6.35 meters on its Sheep Creek property, Montana, USA: Tintagold Resources Inc. News Release.

Reference (Deposit): Cominco Ltd, 1989, 1988 Annual Report

Reference (Exploration): TintinaGold Resources Inc., November 10, 2010, TintinaGold expands land position at its Sheep Creek property, Montana, USA: TintinaGold Resources Inc. News Release.

Reference (Deposit): AVERY, D.W. U.S. BUREAU OF MINES UNPUBLISHED MONTANA DIRECTORY.

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.