Boss Mine

The Boss Mine is a silver 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: Boss Mine  

State:  Colorado

County:  Summit

Elevation:

Primary Mineral: Silver

Lat, Long: 39.69639, -106.19583

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 Boss Mine

Boss Mine MRDS details

Site Name

Primary: Boss Mine
Secondary: Boss-Thunderbolt group


Commodity

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


Location

State: Colorado
County: Summit
District: North Rock Creek Area (Wilkinson Mining District)


Land Status

Not available


Holdings

Not available


Workings

Type: Underground


Ownership

Not available


Production

Not available


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: frontal fault zone


Alterations

Alteration Type: L
Alteration Text: Silicified and chloritized granite with hematite stain


Rocks

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


Analytical Data

Not available


Materials

Ore: Argentite
Ore: Chalcopyrite
Ore: Galena
Ore: Sphalerite
Gangue: Hematite
Gangue: Quartz
Gangue: Siderite


Comments

Comment (Workings): The mine is developed on at least five levels by 6,000 feet of workings.

Comment (Geology): Several veins follow fractures in the frontal fault zone, trend NNW and dip from 40 degrees east to near vertical; they are quartz veins with streaks of sulfide ore minerals.

Comment (Geology): Boss vein strikes N12W and dips 40 NE (average). Vein width averages 3.5 ft, but mineralized material generally much narrower. Thunderbolt vein strikes N05W and dips about 35 NE. Averages about 5.0 ft in width, but mineralized portions of the vein are narrower. Several other veins are present, and ore shoots are commonly localized at vein intersections.

Comment (Location): North side of North Rock Creek, near the common corner of secs. 13, 14, 23, and 24, T 4 S, R 79 W, about 8 miles NW of Silverthorne.

Comment (Production): About $222,000 of high-grade silver ore was produced from 1882-1897; a small amount has been produced since then.

Comment (Reserve-Resource): Mine dumps and old stopes may contain lower grade material that could be concentrated and processed. Maximum tonnage estimated to be 60,000 tons.

Comment (Deposit): FISSURE VEINS IN PORPHYRY


References

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): TWETO, OGDEN, BRYANT, BRUCE, AND WILLIAMS, F.E., 1970, MINERAL RESOURCES OF THE GORE RANGE-EAGLE'S NEST PRIMITIVE AREA AND VICINITY, SUMMIT AND EAGLE COUNTIES, COLORADO: U.S. GEOLOGICAL SURVEY BULLETIN 1319-C, 127 P.

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