The Keystone is a gold mine located in Alaska.
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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Keystone MRDS details
Site Name
Primary: Keystone
Commodity
Primary: Gold
Location
State: Alaska
District: Willow Creek
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Low-sulfide Au-quartz vein
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Role: Host
Age Type: Host Rock
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Gold
Gangue: Quartz
Comments
Comment (Exploration): Status = Inactive
Comment (Geology): Age = Late Cretaceous or younger; the host of mineralization is the Late Cretaceous Willow Creek Pluton.
Comment (Workings): Workings / Exploration = Apparently only minor surface prospecting.
Comment (Reference): Primary Reference = Cohen, 1982
Comment (Geology): Geologic Description = Details about the prospect are unavailable. Most likely, a gold-bearing quartz vein(s) cuts the Late Cretaceous Willow Creek Pluton. The Willow Creek Pluton is a zoned pluton. The outer part consists of hornblende quartz diorite and lesser hornblende tonalite; the core consists of hornblende-biotite granodiorite, and lesser hornblende-biotite quartz monzodiorite and biotite quartz monzonite.
Comment (Deposit): Model Name = Low-sulfide Au-quartz veins ? (Cox and Singer, 1986; model 36a ?)
Comment (Geology): Age = Host rock is Late Cretaceous.
References
Reference (Deposit): Cohen, K.K., 1982, Independence mine and the Willow Creek mining district: Alaska Division of Parks Miscellaneous Publications, History of Archaeology series, No. 32, 169 p.
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