The Golden Age Mine is a gold and silver mine located in Boulder 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
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Golden Age Mine MRDS details
Site Name
Primary: Golden Age Mine
Secondary: inlcudes Golden Age and Sentinel (or Telluride) veins
Secondary: Golden Age
Commodity
Primary: Gold
Primary: Silver
Secondary: Tellurium
Tertiary: Uranium
Location
State: Colorado
County: Boulder
District: Jamestown 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
Not available
Production
Year: 1936
Time Period: 1901-1936
Deposit
Record Type: Site
Operation Category: Past Producer
Deposit Type: Vein
Operation Type: Underground
Discovery Year: 1875
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
Model Name: Alkaline Au-Te (Au-Ag-Te veins)
Orebody
Not available
Structure
Type: L
Description: two veins trend NE and dip to SE
Alterations
Alteration Type: L
Alteration Text: silification
Rocks
Name: Granite
Role: Host
Age Type: Host Rock
Age Young: Neoproterozoic
Analytical Data
Analytical Data: Of the "rich free-gold ore" , PP-223, p. 272 states: "A few shipments ranging in weight from 2 1/4 to 43 3/4 pounds contained 1,103 to 2,285 ounces of gold and 170 to 276 ounces of silver to the ton. Other small shipments contained 16 ounces of gold and 5 ounces of silver to 1,010 ounces of gold and 99 ounces of sivler to the ton. The ratio of gold to silver in this high-grade ore ranged from 2:1 to 10:1."
Analytical Data: PP-223, p. 272: "The low-grade pyritic gold ore [...] has a tenor ranging from 0.38 to about 4 ounces of gold to the ton; the silver content is variable but averages about the same as that of gold. In 1932 ore from the top of the stope [...] averaged 1.6 ounces of gold to the ton, and 9 1/2 tons shpped in 1933 contained 0.38 to 0.82 ounce of gold to the ton.
Materials
Ore: Petzite
Ore: Chalcopyrite
Ore: Pyrite
Ore: Gold
Ore: Galena
Ore: Sphalerite
Ore: Sylvanite
Gangue: Quartz
Comments
Comment (Deposit): CHIEF ORE MINERALS: FREE GOLD, PYRITE, CHALCOPYRITE
Comment (Commodity): Uranium mentioned in Bull. 1159, p. 47, 54, and table 6, p. 48, 50, 52. No mention of Uranium in PP-223.
Comment (Geology): GEOL.DESC: WALL ROCK: QTZ. MONZONITE PORPHYRY, PEGMATITE, APLITE, SCHIST
Comment (Location): Shaft on ridge 2,000 ft NE of Golden Age Hill and 1.7 miles NE of Jamestown, in NE sec 20, T2N, R71W.
Comment (Production): TOTAL ABOUT $1,000,000. FAMOUS FOR VERY RICH FREE-GOLD ORE.
Comment (Reserve-Resource): Sunshine Mining Co. files (Boulder County - Jamestown Project) contain reports that describe the Golden Age mine workings and geology, and include discussions of ore reserves, and exploration targets along the Golden Age-Sentinel vein system trend to the SW, including Columbine, Inexco, Rife, and Skunk adits. In 1992 Sunshine declined to do additional work.
References
Reference (Deposit): LOVERING and GODDARD, 1950, Geology and ore deposits of the Front Range, Colorado: USGS PP 223, p. 271-272, pl. 3.
Reference (Deposit): BLM COLO. CONNECTING SHEETS
Reference (Deposit): SIMS and SHERIDAN, 1964, Geology of uranium deposits in the Front Range, Colorado: USGS BULL. 1159, p. 47, 54, and table 6, p. 48, 50, 52.
Reference (Deposit): CONSV. DIV. COMP. DATE, 10,62
Reference (Deposit): Sunshine Mining Co. Colorado exploration files, Boulder Co., Jamestown project, unpublished data, Colorado Geological Survey.
Colorado Mining Photos
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