The Unnamed (on hill 4890 east of VABM Keg) is a copper and silver 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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Unnamed (on hill 4890 east of VABM Keg) MRDS details
Site Name
Primary: Unnamed (on hill 4890 east of VABM Keg)
Commodity
Primary: Copper
Primary: Silver
Location
State: Alaska
District: Chistochina
Land Status
Not available
Holdings
Not available
Workings
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant:
Physiography
Not available
Mineral Deposit Model
Model Name: Massive sulfide, Cyprus
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Local introduction of epidote.
Rocks
Not available
Analytical Data
Not available
Materials
Ore: Malachite
Ore: Chalcocite
Ore: Azurite
Comments
Comment (Geology): Age = Remobilization of copper may have occurred during green-schist metamorphism in the Jurassic.
Comment (Reference): Primary Reference = Arehart, 1982
Comment (Workings): Workings / Exploration = The occurrence was found in 1981 during regional reconnaissance by Noranda Inc. on Ahtna Inc., regional Native corporation lands.
Comment (Geology): Geologic Description = The occurrence is in schistose, andesitic to basaltic, volcanic rocks, tentatively correlated with the Pennsylvanian to Permian, Tetelna Formation. Numerous occurrences of chalcocite partly oxidized to azurite and malachite occur in the section (Arehart, 1982, p. 3). This locality is Arehart's sample 2308 which contained more than 2 percent copper and 50 ppm silver. The sample was high-grade material; there are also probably numerous additional small copper occurrences in the vicinity.
Comment (Deposit): Model Name = Cyprus massive sulfide (Cox and Singer, 1986; model 24a)
Comment (Deposit): Other Comments = Outcrops are mostly limited to ridge crests; hill slopes below about 3,500 feet in elevation are mostly covered with gravel and have thick brush mats. Additional information can be obtained from Ahtna Minerals in Anchorage, Alaska.
Comment (Exploration): Status = Inactive
References
Reference (Deposit): Arehart, G.B., 1982, Reconnaissance geology/geochemistry of the Alphabet Hills, Gulkana Quadrangle, Alaska: Noranda Exploration, 4 p., maps and appendices. (Report held by Ahtna Minerals Co., Anchorage, Alaska).
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