Pennsylvania Mine

The Pennsylvania Mine is a silver, lead, gold, zinc, and copper mine located in Summit county, Colorado.

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: Pennsylvania Mine  

State:  Colorado

County:  Summit

Elevation:

Primary Mineral: Silver, Lead, Gold, Zinc, Copper

Lat, Long: 39.6, -105.80889

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 Pennsylvania Mine

Pennsylvania Mine MRDS details

Site Name

Primary: Pennsylvania Mine
Secondary: Rothschild (Minerou) Tunnel
Secondary: Congress


Commodity

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


Location

State: Colorado
County: Summit
District: Montezuma - Geneva Creek


Land Status

Not available


Holdings

Not available


Workings

Not available


Ownership

Not available


Production

Year: 1923
Time Period: 1888-92, 1922-23


Deposit

Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
Organization:
Significant: N


Physiography

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


Mineral Deposit Model

Model Name: Polymetallic veins


Orebody

Not available


Structure

Type: L
Description: ore localized in competent gneiss wall rock


Alterations

Alteration Type: L
Alteration Text: wall rocks are silicified, pyritized


Rocks

Name: Porphyry
Role: Host
Age Type: Host Rock
Age Young: Tertiary

Name: Granitoid
Role: Host
Age Type: Host Rock
Age Young: Mesoproterozoic

Name: Gneiss
Role: Host
Age Type: Host Rock
Age Young: Paleoproterozoic

Name: Schist
Role: Host
Age Type: Host Rock
Age Young: Paleoproterozoic


Analytical Data

Not available


Materials

Ore: Chalcopyrite
Ore: Galena
Ore: Sphalerite
Ore: Tetrahedrite
Gangue: Pyrite
Gangue: Quartz


Comments

Comment (Location): NW slope of Decatur Mountain and south side of Peru Creek, about 3 miles ENE of Montezuma, in SE/4 sec.20, T 5 S, R 75 W. Other (previous) mines listed above, Congress, Rothschild (Minerou) Tunnel, are separate mines on the north side of Peru Creek.

Comment (Production): Estimated production (1885-1930) totaled about 2860 oz. of gold, 760,000 oz. silver, 6,600,000 lb. lead, plus lesser amounts of copper and zinc.

Comment (Deposit): SANDSTONE USED IN SILVERTON CITY HALL

Comment (Geology): The Pennsylvania vein strikes NE and dips steeply NW to SE.


References

Reference (Deposit): LOVERING, T.S., 1935, GEOLOGY AND ORE DEPOSITS OF THE MONTEZUMA QUADRANGLE, COLORADO: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 178, 119 P. page 78

Reference (Deposit): LOVERING, T.S., AND GODDARD, E.N., 1950, GEOLOGY AND ORE DEPOSITS OF THE FRONT RANGE, COLORADO: U.S. GEOLOGICAL SURVEY PROFESSIONAL PAPER 223, 319 P.

Reference (Deposit): CONSV. DIV. COMP. DATE, 8,65

Reference (Deposit): NEUERBERG, G.J., BOTINELLY, THEODORE, AND ANALYSIS, 1977, SELECTED GEOCHEMICAL AND PETROGRAPHIC DATA FOR CHARACTERIZING THE MINERALIZED ROCKS OF THE MONTEZUMA MINING DISTRICT, CENTRAL COLORADO: U.S. GEOLOGICAL SURVEY OPEN FILE REPORT 77-425.

Reference (Deposit): WILSON, ANNA B., AND LAROCK, EDWARD J., 1991, ASCII DATABASE FOR PRINCIPAL LODE MINES AND MINERALIZED AREAS IN SOUTHERN SUMMIT COUNTY, COLORADO, U.S. GEOLOGICAL SURVEY OPEN-FILE REPORT 91-0027A AND B, 22 P. AND ONE DISKETTE.

Reference (Deposit): WILSON, ANNA B., AND LAROCK, EDWARD J., IN PRESS, MINERALIZED AREAS AND PRINCIPAL LODE MINES IN SOUTHERN SUMMIT COUNTY, COLORADO, U.S. GEOLOGICAL SURVEY MISCELLANEOUS FIELD STUDIES MAP MF-2163, SCALE 1:50,000.

Reference (Deposit): Sunshine Mining Co. Colorado exploration files, unpublished data, Colorado Geological Survey.