The Unknown Shaft is a silver, lead, and zinc mine located in Summit county, Utah at an elevation of 7,339 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
Elevation: 7,339 Feet (2,237 Meters)
Commodity: Silver, Lead, Zinc
Lat, Long: 40.63667, -111.49417
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Unknown Shaft MRDS details
Site Name
Primary: Unknown Shaft
Secondary: Ontario Group
Commodity
Primary: Silver
Primary: Lead
Primary: Zinc
Secondary: Gold
Secondary: Copper
Secondary: Iron
Location
State: Utah
County: Summit
District: Park City
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: Underground
Ownership
Owner Name: United Park City Mines Co.
Owner Name: Noranda Ltd.
Production
Not available
Deposit
Record Type: Site
Operation Category: Producer
Operation Type: Unknown
Year First Production: 1875
Discovery Year: 1872
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: L
Physiography
General Physiographic Area: Rocky Mountain System
Physiographic Province: Middle Rocky Mountains
Physiographic Detail: Wasatch Mountains
Mineral Deposit Model
Not available
Orebody
Form: TABULAR TO IRREGULAR
Structure
Type: R
Description: Thrust Belt
Alterations
Not available
Rocks
Name: Quartzite
Role: Host
Age Type: Host Rock
Age Young: Mississippian
Analytical Data
Analytical Data: AVERAGE GRADE: AU-.0535 OZ/TON, AG-22.7 OZ./TON, PB-3.97 PERCENT, ZN-5.13 PERCENT, CU-.134 PERCENT
Materials
Ore: Sphalerite
Ore: Galena
Ore: Tetrahedrite
Ore: Pyrite
Gangue: Calcite
Gangue: Quartz
Comments
Comment (Deposit): ALL INFORMATION FOR ONTARIO GROUP IN GENERAL ; INFO.SRC : 1 PUB LIT
Comment (Workings): ONE SHAFT BELONGING TO VERY EXTENSIVE SYSTEM OF WORKINGS OF ONTARIO GROUP.
Comment (Deposit): VEIN DEPOSIT IN WEBER QUARTZITE WITH EXTENSIVE BEDDED REPLACEMENT ORE IN LOWER CARBONATE FORMATIONS
Comment (Location): SECTION SUBDIVISIONS SE 1/4 NE 1/4 NE 1/4
References
Reference (Deposit): ERICKSON, A.J., 1968, THE PARK CITY DISTRICT, UTAH: UTAH GEOL. SOCIETY GUIDEBOOK NO. 22.
Reference (Deposit): PERRY, L.I., 1976, LEAD AND ZINC IN UTAH: UTAH GEOL. AND MIN. SURV. OFR-22.
Reference (Deposit): BOUTWELL, J.M., 1912, GEOL. AND ORE DEPOSITS OF THE PARK CITY DISTRICT: U.S.G.S. PROF. PA. 77.
Reference (Deposit): 1971 GEOLMAP BROMFIELD AND CRITTENDEN GQ-85
Reference (Production): ERICKSON, A.J., 1968, PARK CITY DISTRICT, UT.: UTAH GEOL. SOC. GUIDEBOOK NO. 22.
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