Poovookpuk Mountain Prospect, Bering Sea Mining District, Nome Census Area, Alaska, USAi
Regional Level Types | |
---|---|
Poovookpuk Mountain Prospect | Prospect |
Bering Sea Mining District | Mining District |
Nome Census Area | Census Area |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
63° 27' 0'' North , 171° 31' 47'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
Place | Population | Distance |
---|---|---|
Gambell | 701 (2017) | 38.0km |
Mindat Locality ID:
199453
Long-form identifier:
mindat:1:2:199453:0
GUID (UUID V4):
17510bc1-4f41-41ad-b182-6edc4ce61e20
Location: This site is on the east side of Poovookpuk Mountain in the headwaters of the Kookooliktook River, western St. Lawrence Island. It is centered on a small ridge between headwater tributaries at an elevation of about 600 feet. It is located within 1/2 mile and is locality 9 of Cobb (1972). Cobb (1980) summarized relevant references under the name 'Poovookpuk Mtn.'.
Geology: A stock of quartz monzonite porphyry, 1/2 mile across, intrudes Cretaceous volcanic rocks and contains disseminated chalcopyrite, malachite, pyrite and minor molybdenite (Patton and Csejtey, 1971, p. C13). A grab sample contained 3,000 ppm copper but the molybdenum concentration in this sample was below detection (Patton and Csejtey, 1971, p. C8). Composite chip samples collected across the stock contained 700 ppm copper or less (Patton and Csejtey, 1971, p. C13). The Cretaceous volcanic rocks peripheral to the stock are heavily pyritized and extensively oxidized. The only sulfide mineral identified in the volcanic rocks is pyrite but a grab sample of massive pyritized rock contained 1,500 ppm copper, 10 ppm silver, and 30 ppm molybdenum. Fourteen stream sediment samples collected over about 1.5 miles of the nearby headwater drainages (Patton and Csejtey, 1972) contained anomalous to highly anomalous concentrations of copper (to 1,500 ppm), molybdenum (to 70 ppm), and silver (to 1.5 ppm). Alteration of the quartz monzonite porphyry has not been described but is probably present. The nearby volcanic rocks are probably also altered in addition to being pyritized.
Workings: A grab sample contained 3,000 ppm copper but the molybdenum concentration in this sample was below detection (Patton and Csejtey, 1971, p. C8). Composite chip samples collected across the stock contained 700 ppm copper or less (Patton and Csejtey, 1971, p. C13). The only sulfide mineral identified in the volcanic rocks is pyrite but a grab sample of massive pyritized rock contained 1,500 ppm copper, 10 ppm silver, and 30 ppm molybdenum. Fourteen stream sediment samples collected over about 1.5 miles of the nearby headwater drainages (Patton and Csejtey, 1972) contained anomalous to highly anomalous concentrations of copper (to 1,500 ppm), molybdenum (to 70 ppm), and silver (to 1.5 ppm).
Age: Mid-Cretaceous, the age of K/Ar dated intrusive and volcanic rocks on western St. Lawrence Island (Patton and Csejtey, 1980).
Alteration: Alteration of the quartz monzonite porphyry has not been described but is probably present. The nearby volcanic rocks are probably also altered in addition to being pyritized.
Commodities (Major) - Cu, Mo
Development Status: None
Deposit Model: Fracture fillings, veins, and disseminations of chalcopyrite and molybdenite in
Select Mineral List Type
Standard Detailed Gallery Strunz Chemical ElementsCommodity List
This is a list of exploitable or exploited mineral commodities recorded at this locality.Mineral List
4 valid minerals.
Detailed Mineral List:
ⓘ Chalcopyrite Formula: CuFeS2 |
ⓘ Malachite Formula: Cu2(CO3)(OH)2 |
ⓘ Molybdenite Formula: MoS2 |
ⓘ Pyrite Formula: FeS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
ⓘ | Molybdenite | 2.EA.30 | MoS2 |
ⓘ | Pyrite | 2.EB.05a | FeS2 |
Group 5 - Nitrates and Carbonates | |||
ⓘ | Malachite | 5.BA.10 | Cu2(CO3)(OH)2 |
List of minerals for each chemical element
H | Hydrogen | |
---|---|---|
H | ⓘ Malachite | Cu2(CO3)(OH)2 |
C | Carbon | |
C | ⓘ Malachite | Cu2(CO3)(OH)2 |
O | Oxygen | |
O | ⓘ Malachite | Cu2(CO3)(OH)2 |
S | Sulfur | |
S | ⓘ Chalcopyrite | CuFeS2 |
S | ⓘ Molybdenite | MoS2 |
S | ⓘ Pyrite | FeS2 |
Fe | Iron | |
Fe | ⓘ Chalcopyrite | CuFeS2 |
Fe | ⓘ Pyrite | FeS2 |
Cu | Copper | |
Cu | ⓘ Chalcopyrite | CuFeS2 |
Cu | ⓘ Malachite | Cu2(CO3)(OH)2 |
Mo | Molybdenum | |
Mo | ⓘ Molybdenite | MoS2 |
Other Databases
Link to USGS - Alaska: | SL008 |
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