The The Nunatak Molybdenum Prospect is a molybdenum mine located in Alaska at an elevation of 600 feet.
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
Elevation: 600 Feet (183 Meters)
Commodity: Molybdenum
Lat, Long: 58.98556, -136.10222
Map: View on Google Maps
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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.
The Nunatak Molybdenum Prospect MRDS details
Site Name
Primary: The Nunatak Molybdenum Prospect
Commodity
Primary: Molybdenum
Secondary: Copper
Tertiary: Gold
Tertiary: Silver
Location
State: Alaska
District: Juneau/Glacier Bay
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
Discovery Year: 1941
Years of Production:
Organization:
Significant: N
Deposit Size: M
Physiography
Not available
Mineral Deposit Model
Not available
Orebody
Not available
Structure
Not available
Alterations
Alteration Type: L
Alteration Text: Outward From Quartz Monzonite, Limestone And Argellites Undergo Silicified, Skarn, And Cherty Haloes
Rocks
Name: Quartz Monzonite
Role: Associated
Age Type: Associated Rock
Age Young: Late Cretaceous
Analytical Data
Not available
Materials
Ore: Molybdenite
Ore: Chalcopyrite
Ore: Bornite
Ore: Tetrahedrite
Ore: Gold
Ore: Malachite
Gangue: Alunite
Gangue: Albite
Gangue: Pyrrhotite
Gangue: Pyrite
Gangue: Enargite
Gangue: Epidote
Gangue: Chlorite
Comments
Comment (Deposit): LARGE DEPOSIT, BUT LOW-GRADE. DEPOSIT AND SURROUNDING AREA AN EXCELLENT EXPLORATION TARGET ; INFO.SRC : 1 PUB LIT
Comment (Deposit): LIMESTONE AND LIMEY ARGELLITES (HORNFELS) HAVE BEEN INTRUDED BY QUARTZ MONZONITE DIKES, PLUGS, AND STOCKS CAUSING SILICIFIED, SKARN, AND CHERTY HALO ALTERATION. STOCK-WORK OF CLOSELY SPACED QUARTZ VEINS AND VEINLETS CONTAIN MOLYBDENITE AS SELVAGES, OR THIN FILMS ALONG THEIR BORDERS, ROSETTES OF MOLYBDENITE CRYSTALS, AND DISSEMINATIONS OF MOLYBDENITE. VEINS ALSO CONTAIN MINOR TO TRACE AMOUNTS OF PYRITE, PYRRHOTITE, CHALCOPYRITE, TETRAHEDRITE, BORNITE, ENARGITE, ALUNITE, POTASSIUM FELDSPAR, EPIDOTE, ALBITE, MALACHITE, AND CHLORITE. MOLYBDENITE MINERALIZATION SURROUNDS QUARTZ MONZONITE PORPHYRY DIKES AND PLUGS. MINERALIZATION IS MAINLY CONFINED TO THE SKARN ALTERATION IN THE LIMESTONE AND HORNFELS, AND EXTENDS TO THE BEACH ON THE NORTH SIDE AND TO A SMALL LAKE ON THE SOUTH, A HORIZONTAL DISTANCE OF 4,600 FT OVER A 1,100 FT. VERTICAL EXPOSURE. MINERALIZATION EXTENDS UNDER MUIR INLET TO THE NW AND UNDER GLACIAL MORAINE TO THE NE. DEPOSIT CONTAINS INDICATED 145 MILLION TONS OF
Comment (Deposit): MATERIAL ACCESSIBLE TO SURFACE MINING AT GRADE OF 0.04-0.06% MO AND 0.02% CU AND INFERRED 9.1 MILLION TONS BELOW SEA LEVEL NEAR COASTLINE AT 0.06% MO AND 0.02% CU. INDICATED GROSS IN PLACE VALUE OF DEPOSIT IS $550 MILLION (1978). DATA FROM USGS OF 78-494, P. 239.
Comment (Location): USGS P 632, LOC. 21, PLATE 12, SAMPLE 66 ARE-23; USGS OF 78-494, PLATE IV LAND STATUS VALUE CALCULATED 6-94 USING GIS OVERLAY ANALYSIS WITH BLM 1:2,500,000 SCALE OWNERSHIP STATUS MAP (1991).
Comment (Development): DISCOVERED IN 1941, MAPPED BY USGS AND USBM IN 1942, WITH TWO HOLES DRILLED. AMERICAN EXPLORATION AND MINING DRILLED 3 HOLES IN 1966, SUPERIOR OIL DRILLED 7 MORE IN 1968. 38 ACTIVE CLAIMS
Comment (Geology): LIMESTONE AND LIMEY ARGILLITES INTRUDED BY QUARTZ MONZONITE PORPHYRY DIKES, PLUGS, AND STOCKS.
Comment (Workings): 11 DIAMOND DRILL HOLES DRILLED AT DEPTHS UP TO 892 FT., NUMEROUS SURFACE SAMPLE TRENCHES
Comment (Deposit): THIS SITE NAME WAS CREATED BY THE REPORTER OR OTHER USGS EMPLOYEE BASED ON PROXIMITY TO SOME MAJOR GEOGRAPHIC FEATURE.
References
Reference (Deposit): USGS OF 78-494, PLATE IV, P. C-274-295 (1978)
Reference (Deposit): USGS P 632, PLATE 1, 11, 12, P. 74-78 (1971)
Reference (Deposit): USGS MF-436, LOC. 43 (1972)
Reference (Deposit): USGS B 1121-K, P. K 49 (1963)
Reference (Other Database): BAG-P-632-21
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