Unknown Shaft

The Unknown Shaft is a zinc, silver, and lead mine located in Summit county, Utah at an elevation of 7,539 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

Name: Unknown Shaft  

State:  Utah

County:  Summit

Elevation: 7,539 Feet (2,298 Meters)

Primary Mineral: Zinc, Silver, Lead

Lat, Long: 40.63167, -111.49306

Map: View on Google Maps

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.


Satelite image of the Unknown Shaft

Unknown Shaft MRDS details

Site Name

Primary: Unknown Shaft
Secondary: Ontario Group


Commodity

Primary: Zinc
Primary: Silver
Primary: Lead
Secondary: Iron
Secondary: Gold
Secondary: Copper


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: Tetrahedrite
Ore: Pyrite
Ore: Galena
Gangue: Calcite
Gangue: Quartz


Comments

Comment (Location): SECTION SUBDIVISONS NE 1/4 NE 1/4 SE 1/4

Comment (Deposit): VEIN DEPOSIT IN WEBER QUARTZITE WITH EXTENSIVE BEDDED REPLACEMENT ORE IN LOWER CARBONATE FORMATIONS

Comment (Workings): ONE SHAFT BELONGING TO VERY EXTENSIVE SYSTEM OF WORKINGS OF ONTARIO GROUP

Comment (Deposit): ALL INFORMATION FOR ONTARIO GROUP IN GENERAL ; INFO.SRC : 1 PUB LIT


References

Reference (Production): ERICKSON, A.J., 1968, PARK CITY DISTRICT, UT.: UTAH GEOL. SOC. GUIDEBOOK, NO. 22

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


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