Unnamed Occurrence (ARDF - HU023; lode on Indian River), Hughes Mining District, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - HU023; lode on Indian River) | - not defined - |
| Hughes Mining District | Mining District |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
66° 4' 48'' North , 153° 48' 50'' West
Latitude & Longitude (decimal):
Köppen climate type:
Location: This lode occurrence is in the placer workings on Indian River. The exact location within the placer workings is not known and the site is located somewhat arbitrarily about a mile down Indian River from the mouth of Black Creek.
Geology: Joesting (1942) reported that a molybdenum deposit had been discovered on the Indian River during placer operations. Although the mineralization was said to be high grade there apparently was no attempt to systematically sample the deposit. There is no information that suggests that any work was done to further explore this occurrence. The only other indication of Mo mineralization in the area was an anomalous Mo value of 25 ppm in a placer sample collected by the Bureau of Land Management in about 1997 (Kurtak and others, 1999). The bedrock under the placer workings is Cretaceous granodiorite and quartz monzonite (Patton and Miller, 1966). Nokleberg and others (1996) describe, without a specific location, the general Indian Mountain area as a porphyry Cu-Au system. This system, which likely includes all the individual lode occurrences within the area, consists predominately of chalcopyrite- and tourmaline-bearing intrusive breccias. The breccias are surrounded by concentric phyllic-argillic-propylitic alteration halos. A pyrite zone surrounds the intrusive rocks.
Workings: Apparently none.
Alteration: Highly altered intrusive rocks have been described in the general area but none specifically associated with this occurrence. The type of alteration is not specified.
Commodities (Major) - Mo
Development Status: None
Deposit Model: Porphyry Cu-Mo(?) (Cox and Singer, 1986; model 21a)
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
1 valid mineral.
Detailed Mineral List:
| ⓘ Molybdenite Formula: MoS2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Molybdenite | 2.EA.30 | MoS2 |
List of minerals for each chemical element
| S | Sulfur | |
|---|---|---|
| S | ⓘ Molybdenite | MoS2 |
| Mo | Molybdenum | |
| Mo | ⓘ Molybdenite | MoS2 |
Other Databases
| Link to USGS - Alaska: | HU023 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Koyukuk-Indian Mountain DomainDomain
- Koyukuk ArcsVolcanic Arc
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