Unnamed Prospect (ARDF - HE051; south of upper Long Creek), Valdez Creek Mining District, Matanuska-Susitna Borough, Alaska, USAi
Regional Level Types | |
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Unnamed Prospect (ARDF - HE051; south of upper Long Creek) | - not defined - |
Valdez Creek Mining District | Mining District |
Matanuska-Susitna Borough | Borough |
Alaska | State |
USA | Country |
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Latitude & Longitude (WGS84):
63° 10' 48'' North , 149° 41' 23'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
202149
Long-form identifier:
mindat:1:2:202149:5
GUID (UUID V4):
b13efa17-aa21-47d5-8b9c-39618652d680
Location: This prospect is at an elevation of 400 feet south of upper Long Creek. The site is in sec. 17, T. 20 S., R. 11 W., of the Fairbanks Meridian. The location is accurate to within 1 mile. This is loc. 12 of Hawley and others (1969); loc. 35 of Hawley and Clark (1974).
Geology: The country rocks in the area of this prospect consist largely of sheared, Devonian serpentinite that forms lenticular and podiform tectonic blocks as much as several hundred meters in size. The deposit is in serpentinite, and consists of pyrite-rich pods, locally accompanied by chalcopyrite and gold-rich zones. Local high platinum, chrome, and nickel values have also been reported. Samples contain up to 0.3 ppm gold, 1,500 ppm chromium, 3,000 ppm copper, 1,500 ppm nickel, and a trace of platinum (Hawley and others, 1969).
Workings: Surface sampling only. Local high platinum, chrome, and nickel values have also been reported. Samples contain up to 0.3 ppm gold, 1,500 ppm chromium, 3,000 ppm copper, 1,500 ppm nickel, and a trace of platinum (Hawley and others, 1969).
Age: The copper and chromium minerals probably were syngenetic with their Devonian ultramafic hostrock, and may have been partly redistributed during serpentinization.
Reserves: None of the sulfide bodies appears to be of any significant size.
Commodities (Major) - Au, Cu; (Minor) - Cr, Ni, Pt
Development Status: None
Deposit Model: Podiform chromite (Cox and Singer, 1986; model 8a)
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
3 valid minerals.
Detailed Mineral List:
ⓘ Chalcopyrite Formula: CuFeS2 |
ⓘ Chromite Formula: Fe2+Cr3+2O4 |
ⓘ Pyrite Formula: FeS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
Group 2 - Sulphides and Sulfosalts | |||
---|---|---|---|
ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
ⓘ | Pyrite | 2.EB.05a | FeS2 |
Group 4 - Oxides and Hydroxides | |||
ⓘ | Chromite | 4.BB.05 | Fe2+Cr3+2O4 |
List of minerals for each chemical element
O | Oxygen | |
---|---|---|
O | ⓘ Chromite | Fe2+Cr23+O4 |
S | Sulfur | |
S | ⓘ Chalcopyrite | CuFeS2 |
S | ⓘ Pyrite | FeS2 |
Cr | Chromium | |
Cr | ⓘ Chromite | Fe2+Cr23+O4 |
Fe | Iron | |
Fe | ⓘ Chalcopyrite | CuFeS2 |
Fe | ⓘ Chromite | Fe2+Cr23+O4 |
Fe | ⓘ Pyrite | FeS2 |
Cu | Copper | |
Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
Link to USGS - Alaska: | HE051 |
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Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
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