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.
Primary Mineral: Silver
Lat, Long: 39.69639, -106.19583
Map: View on Google Maps
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.
Boss Mine MRDS details
Primary: Boss Mine
Secondary: Boss-Thunderbolt group
District: North Rock Creek Area (Wilkinson Mining District)
Record Type: Site
Operation Category: Past Producer
Operation Type: Unknown
Years of Production:
General Physiographic Area: Rocky Mountain System
Physiographic Province: Southern Rocky Mountains
Mineral Deposit Model
Model Name: Polymetallic veins
Description: frontal fault zone
Alteration Type: L
Alteration Text: Silicified and chloritized granite with hematite stain
Age Type: Host Rock
Age Young: Paleoproterozoic
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
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.