The Easter 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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Easter MRDS details
Site Name
Primary: Easter
Commodity
Primary: Gold
Location
State: Alaska
District: Ketchikan
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
Not available
Analytical Data
Not available
Materials
Ore: Arsenopyrite
Ore: Gold
Ore: Pyrite
Gangue: Quartz
Comments
Comment (Geology): Geologic Description = The country rocks on northern Gravina Island are chiefly Upper Jurassic to mid-Cretaceous andesitic and basaltic volcanic rocks that gradationally intertongue with flyschlike sedimentary rocks. The rocks are intruded by at least one pluglike body of Tertiary gabbro (Berg, 1973; Berg and others, 1988). The bedded rocks were regionally metamorphosed to low-greenschist grade in Late Cretaceous time, and subsequently contact metamorphosed to hornblende hornfels near the contact of the Tertiary gabbro. The country rocks are cut by a high-angle fault along Tongass Narrows that displays about 4 miles of right-lateral offset.? the deposit is in slate and greenschist and consists of quartz fissure veins up to two feet thick that contain pyrite, a trace of arsenopyrite, and free gold (Brooks, 1902, p. 62-63). The principal vein was traced on the surface for 3800 feet. It strikes NW and dips steeply NE, at an angle to the foliation of the schist. Around 1901, the owners reported gold values of $3-$400/ton (Au at $20.67/oz.). At that time, the deposit had been explored by a six-foot-deep pit.
Comment (Reference): Primary Reference = Brooks, 1902; Berg, 1973
Comment (Workings): Workings / Exploration = Around 1901, the owners reported gold values of $3-$400/ton (Au at $20.67/oz.). At that time, the deposit had been explored by a six-foot-deep pit.
Comment (Geology): Age = Late Cretaceous or younger.
Comment (Deposit): Model Name = Low-sulfide gold-quartz veins (Cox and Singer, 1986; model 36a)
References
Reference (Deposit): Brooks, A.H., 1902, Preliminary report on the Ketchikan mining district, Alaska, with an introductory sketch of the geology of southeastern Alaska: U.S. Geological Survey Professional Paper 1, 120 p.
Reference (Deposit): Berg, H.C., 1973, Geology of Gravina Island Alaska: U.S. Geological Survey Bulletin 1373, 41 p.
Reference (Deposit): Elliott, R.L., Berg, H.C., and Karl, Susan, 1978, map and table describing metalliferous and selected nonmetalliferous mineral deposits, Ketchikan and Prince Rupert quadrangles, Alaska: U.S. Geological Survey Open-file Report, 78-73-B,17 p., scale 1:250,000.
Reference (Deposit): Berg, H.C., Elliott, R.L., and Koch, R.D., 1988, Geologic map of the Ketchikan and Prince Rupert quadrangles, southeastern Alaska: U.S. Geological Survey Mineral Investigations Series Map MF-1807,27 p., scale 1:250,000.
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