Unnamed Occurrence (ARDF - ID019; west of upper Brown Creek), Innoko Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - ID019; west of upper Brown Creek) | - not defined - |
| Innoko Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
62° 55' 49'' North , 156° 49' 4'' West
Latitude & Longitude (decimal):
Köppen climate type:
Mindat Locality ID:
200826
Long-form identifier:
mindat:1:2:200826:7
GUID (UUID V4):
6e392dcf-a333-4904-a354-0093183ec1a7
Location: This occurrence is at an elevation of about 2,400 feet on a knob near the head of Brown Creek. It is about 0.4 mile north-northwest of hill 2665 in the SW1/4, section 23, T. 33N., R. 40W., of the Seward Meridian. The location is accurate.
Geology: This occurrence consists of a pod of pyrrhotite in dense hornfels, about 650 feet from the east contact of the Cretaceous, Beaver Mountains pluton. The pod is poorly exposed. From rubble scattered across the hillside, the pod is is estimated to be 6 feet thick and 90 feet long. Two grab samples contained an average of about 20 percent iron, 1.0 parts per million (ppm) silver, 200 ppm copper, and 40 ppm antimony (Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005).
Workings: The occurrence was mapped and sampled by the Alaska Division of Geological and Geophysical Surveys in 1979 (Bundtzen and Laird, 1982).
Age: Probably related to the Beaver Mountains pluton which has been dated at 70.1 Ma. (Bundtzen and Laird, 1982).
Alteration: In hornfels near contact of granitic pluton.
Commodities (Major) - Fe; (Minor) - Ag, Cu, Sb
Development Status: None
Deposit Model: Polymetallic vein (Cox and Singer, 1986; model 22c).
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
2 valid minerals.
Detailed Mineral List:
| ⓘ Pyrrhotite Formula: Fe1-xS |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Pyrrhotite | 2.CC.10 | Fe1-xS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Pyrrhotite | Fe1-xS |
| Fe | Iron | |
| Fe | ⓘ Pyrrhotite | Fe1-xS |
Other Databases
| Link to USGS - Alaska: | ID019 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Farewell buried DomainDomain
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References
