The Porphyry Mountain is a molybdenum and 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
Satelite View
MRDS mine locations are often very general, and in some cases are incorrect. Some mine remains have been covered or removed by modern industrial activity or by development of things like housing. The satellite view offers a quick glimpse as to whether the MRDS location corresponds to visible mine remains.
Porphyry Mountain MRDS details
Site Name
Primary: Porphyry Mountain
Commodity
Primary: Molybdenum
Primary: Gold
Secondary: Copper
Location
State: Alaska
District: Nizina
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
Not available
Orebody
Not available
Structure
Not available
Alterations
Not available
Rocks
Name: Diorite
Role: Associated
Age Type: Associated Rock
Age Young: Pliocene
Analytical Data
Not available
Materials
Ore: Molybdenite
Ore: Chalcopyrite
Gangue: Quartz
Comments
Comment (Deposit): Model Name = Lode: vein.
Comment (Geology): Geologic Description = Discontinuous, irregular molybdenite- and minor chalcopyrite-bearing quartz vein up to 0.5 cm thick following fault in Tertiary granodiorite pluton. Molybdenite localized along vein selvages.
Comment (Reference): Primary Reference = MacKevett and Smith, 1968
Comment (Workings): Workings / Exploration = About 120 m of underground workings. Channel and grab samples generally contained >2,000 ppm Mo and as much as 2.4 ppm Au and 100 ppm Cu (MacKevett and Smith, 1968).
Comment (Exploration): Status = Inactive
References
Reference (Deposit): MacKevett, E.M., Jr., 1976, Mineral deposits and occurrences in the McCarthy quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-773-B, scale 1:250,000.
Reference (Deposit): MacKevett, E.M., Jr., 1974, Geologic map of the McCarthy B-5 quadrangle, Alaska: U.S. Geological Survey Geologic Quadrangle Map GQ-1146, scale 1:63,360.
Reference (Deposit): MacKevett, E.M., Jr., and Smith, J.G., 1968, Distribution of gold, copper, and some other metals in the McCarthy B-4 and B-5 quadrangles, Alaska: U.S. Geological Survey Circular 604, 25 p.
The Top Ten Gold Producing States
These ten states contributed the most to the gold production that built the West from 1848 through the 1930s. The Top Ten Gold Producing States.
