Snowden Creek Occurrence, Koyukuk Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Snowden Creek Occurrence | Occurrence |
| Koyukuk Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
67° 45' 36'' North , 149° 42' 36'' West
Latitude & Longitude (decimal):
Type:
KΓΆppen climate type:
Mindat Locality ID:
200055
Long-form identifier:
mindat:1:2:200055:1
GUID (UUID V4):
d9b8a644-021a-4e5a-b6c9-eb5c167576cb
Location: The Snowden Creek occurrence is approximately 3 miles south-southwest of Snowden Mountain. It is near the 3,000-foot level of a ridge immediately north of lower Snowden Creek and overlooking the Dietrich River (sec. 24, T. 34 N., R. 10 W., of the Fairbanks Meridian). The location is accurate within a 1/2-mile radius.
Geology: This occurrence consists of: (a) a 6-inch-thick gypsum-calcite zone in shaley limestone which contains abundant fine-grained pyrite; and (b) vein quartz float that contains traces of graphite, pyrite, and chalcopyrite (Mulligan, 1974). Dillon and others (1988) mapped the country rocks as a Devonian igneous unit of diabase, gabbro, and diorite dikes and sills that is in contact with Middle Ordovician black, carbonaceous phyllite and meta-limestone. Calc-silicate hornfels occurs along the contact. Cr, Pb, Ni, and V were detected spectrographically in samples from the occurrence (Mulligan, 1974).
Commodities (Major) - Cu; (Minor) - Gypsum
Development Status: None
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
6 valid minerals.
Detailed Mineral List:
| β Calcite Formula: CaCO3 |
| β Chalcopyrite Formula: CuFeS2 |
| β Graphite Formula: C |
| β Gypsum Formula: CaSO4 · 2H2O |
| β Pyrite Formula: FeS2 |
| β Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| β | Graphite | 1.CB.05a | C |
| Group 2 - Sulphides and Sulfosalts | |||
| β | Chalcopyrite | 2.CB.10a | CuFeS2 |
| β | Pyrite | 2.EB.05a | FeS2 |
| Group 4 - Oxides and Hydroxides | |||
| β | Quartz | 4.DA.05 | SiO2 |
| Group 5 - Nitrates and Carbonates | |||
| β | Calcite | 5.AB.05 | CaCO3 |
| Group 7 - Sulphates, Chromates, Molybdates and Tungstates | |||
| β | Gypsum | 7.CD.40 | CaSO4 Β· 2H2O |
List of minerals for each chemical element
| H | Hydrogen | |
|---|---|---|
| H | β Gypsum | CaSO4 · 2H2O |
| C | Carbon | |
| C | β Calcite | CaCO3 |
| C | β Graphite | C |
| O | Oxygen | |
| O | β Calcite | CaCO3 |
| O | β Gypsum | CaSO4 · 2H2O |
| O | β Quartz | SiO2 |
| Si | Silicon | |
| Si | β Quartz | SiO2 |
| S | Sulfur | |
| S | β Chalcopyrite | CuFeS2 |
| S | β Gypsum | CaSO4 · 2H2O |
| S | β Pyrite | FeS2 |
| Ca | Calcium | |
| Ca | β Calcite | CaCO3 |
| Ca | β Gypsum | CaSO4 · 2H2O |
| Fe | Iron | |
| Fe | β Chalcopyrite | CuFeS2 |
| Fe | β Pyrite | FeS2 |
| Cu | Copper | |
| Cu | β Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS - Alaska: | CH105 |
|---|
Other Regions, Features and Areas containing this locality
North America
- Brooks RangeMountain Range
- Rocky MountainsMountain Range
North America PlateTectonic Plate
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References
