The York Creek Occurrence is a copper 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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York Creek Occurrence MRDS details
Site Name
Primary: York Creek Occurrence
Commodity
Primary: Copper
Secondary: Nickel
Secondary: Cobalt
Tertiary: Gold
Location
State: Alaska
District: Juneau
Land Status
Land ownership: National Park
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
Not available
Ownership
Not available
Production
Not available
Deposit
Record Type: Site
Operation Category: Occurrence
Operation Type: Unknown
Years of Production:
Organization:
Significant: N
Deposit Size: S
Physiography
Not available
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Not available
Analytical Data
Analytical Data: USGS PP 632, P. 31, TABLE 9, LOC. 8
Analytical Data: AU BY FIRE ASSAY AA METHOD
Analytical Data: 20 FT CHIP SAMPLE IN 1-FOOT INTERVALS ACROSS BRECCIA ZONE IN HORNFELS: 50 PPM CU, TRACE AU
Analytical Data: SELECTED SAMPLE OF PYRITE BEARING QUARTZ VEIN: 1500 PPM CU, 150 PPM CO, 150 PPM NI, TRACE AU
Materials
Gangue: Quartz
Gangue: Pyrrhotite
Gangue: Pyrite
Comments
Comment (Location): MINERALIZATION AT 100 FT. AND BETWEEN 400 TO 700 FT ABOVE YORK CREEK ON THE N BANK; BEST LOCATION: USGS OFR 78-494, LOC. 91, PLATE III LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).
Comment (Development): 4 CLAIMS STAKED BETWEEN 1899 AND 1904
Comment (Deposit): 15 WIDELY SPACED PYRITE-RICH QUARTZ VEINS AND ALTERED ZONES CONTAIN PODS OF PYRITE; VEINS UP TO 0.5 FT THICK, ALTERED ZONES UP TO 50 FT WIDE IN HORNFELS; NEARBY FE STAINED ZONE 0.5 MI LONG IN SILICEOUS LIMESTONE CONTAINS 5-10% PYRRHOTITE
Comment (Deposit): SEE ALSO: SANDY COVE, MILLER PEAK ; INFO.SRC : 1 PUB LIT; 2 UNPUB REPT
References
Reference (Other Database): BAG-OFR-85-717-011
Reference (Deposit): USGS OFR 85-717, P. 24
Reference (Deposit): USGS OFR 78-494, P. C-365-6, LOC. 91
Reference (Deposit): USGS PP 632, P. 31, 34, LOC. 8
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