Pacific Mine

The Pacific Mine is a lead and silver mine located in Utah county, Utah at an elevation of 7,799 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: Pacific Mine
Secondary: Pacific Gold Mining and Milling Co.
Secondary: Blue Rock Mine

Commodity

Primary: Lead
Primary: Silver
Secondary: Gold
Secondary: Copper
Secondary: Zinc
Tertiary: Barium-Barite

Location

State: Utah
County: Utah
District: American Fork District

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: East Utah Mining Co.
Home Office: Reno, Nv.

Production

Not available

Deposit

Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Unknown
Year First Production: 1905
Year Last Production: 1936
Discovery Year: 1900
Discovery Method: Ore-Mineral In Place
Years of Production:
Organization:
Significant: N
Deposit Size: S

Physiography

General Physiographic Area: Rocky Mountain System
Physiographic Province: Middle Rocky Mountains
Physiographic Detail: Wasatch Mountains

Mineral Deposit Model

Not available

Orebody

Form: TABULAR

Structure

Type: R
Description: Uinta-Cottonwood Arch, Cordilleran Hingeline, Sevier Overthrust Belt

Type: L
Description: Mountain Dell Fault And Numerous Local Splays

Alterations

Alteration Type: L
Alteration Text: Oxidation

Rocks

Name: Quartzite
Role: Host
Age Type: Host Rock
Age Young: Late Cambrian

Analytical Data

Analytical Data: EARLY ORE AVERAGED 30 OZ/TON AG AND 15% PB

Materials

Ore: Sphalerite
Ore: Gold
Ore: Tetrahedrite
Ore: Galena
Gangue: Quartz
Unknown: Barite

Comments

Comment (Deposit): Discovery Year: NEAR 1900

Comment (Production): NO ESTIMATES OF TONNAGE OF PRODUCTION COULD BE FOUND. EARLY GRADES WERE 30 OZ/TON AG AND 15% PB. PRODUCTION BETWEEN 1916 AND 1918 BY FISSURES EXPLORATION CO., WHO LEASED THE MINE, RESULTED IN A LEAD CONCENTRATE CONTAINING 55 CENTS/TON AU, 14.9 OZ/TON AG, AND 30.1% PB. ZINC, 2.15%, WAS NOT RECOVERED. ANOTHER ESTIMATE OF AVERAGE CONCENTRATE GRADES WAS 17 CENTS PER TON AU, 15.88 OZ/TON AG, 34.99% PB, AND .34% CU.

Comment (Development): FAIRLY CONSTANT DEVELOPMENT FROM 1905 UNTIL 1918. INTERMITTENT ACTIVITY FROM 1918 TO 1936 BY LEASEES

Comment (Deposit): DEPOSIT WAS A PERSISTONT FISSURE VEIN CALLED THE PACIFIC VEIN. MINERALIZATION WITHIN THE VEIN WAS IN SMALL SHOOTS AND LENTICULAR PODS. WIDTH OF VEIN CONTROLLED BY WIDTH OF SHATTERED ZONE OF QUARTZITE NEXT TO FAULT

Comment (Workings): THREE ADITS AND TWO PROSPECT PITS SHOWN ON MAP. WORKINGS CONSIST OF INTERCONNECTED ADITS, SHAFTS AND RAISES WHICH FOLLOWED THE PACIFIC FISSURE ON SEVERAL LEVELS OVER A STRIKE LENGTH OF 1200 FT.

Comment (Geology): HOST FOR ORE IS HIGHLY SHATTERED QUARTZITE AND SHALE ON A SHALLOWLY DIPPING, NORTHEAST STRIKING SPLAY OF THE MOUNTAIN DELL FAULT. HOSTING FAULT DIPS 50 TO 60 DEGREES TO THE NORTHWEST.

Comment (Location): UTM COORDINATES GIVEN FOR CARD ARE FOR THE LOWER TUNNEL. UTM COORDINATES OF OTHER OPENINGS ARE AS FOLLOWS: LOWER BLUE ROCK TUNNEL-4487920 N, 449550 E, UPPER BLUE ROCK TUNNEL - 4487930 N, 449450 E. ; INFO FROM LAND.ST :1983

References

Reference (Deposit): CALKINS, F.C., AND BUTLER, B.S., 1943, GEOLOGY AND ORE DEPOSITS OF THE COTTONWOOD-AMERICAN FORK AREA, UTAH: U.S. GEOLOGICAL SURVEY PROF. PAPER NO. 201.

Reference (Deposit): BUTLER, B.S., LOUGHLIN, G.F., HEIKES, V.C., AND OTHERS, 1920, THE ORE DEPOSITS OF UTAH: U.S. GEOLOGICAL SURVEY PROF. PAPER NO. 111.

Reference (Deposit): BAKER, A.A., CALKINS, F.C., CRITTENDEN, M.D., JR., AND BROMFIELD, C.S., 1966, GEOLOGIC MAP OF THE BRIGHTON QUADRANGLE, UTAH: U.S. GEOLOGICAL SURVEY GEOL. QUAD. MAP GQ-534

Reference (Production): CALKINS AND BUTLER, 1943

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