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Unnamed Occurrence (ARDF - MM085; lower Ruby Creek), Kantishna Mining District, Denali Borough, Alaska, USAi
| Regional Level Types | |
|---|---|
| Unnamed Occurrence (ARDF - MM085; lower Ruby Creek) | - not defined - |
| Kantishna Mining District | Mining District |
| Denali Borough | Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 33' 27'' North , 150° 49' 37'' West
Latitude & Longitude (decimal):
Köppen climate type:
The occurrence is in Denali National Park and Preserve.
Location: This occurence is at an elevation of about 2650 feet in lower Ruby Creek, a tributary of Yellow Creek. It is in the SE1/4 NW1/4 section 3, T. 16 S., R. 17 W., Fairbanks Meridian. The location is accurate within 300 feet. The occurrence represents the location of rock sample 209 of Hawley and Associates (1978), and appears not to have been described previously.
Geology: A major fault that strikes NNW controls the course of Yellow Creek; strata to the east are apparently downthrown. This occurrence is in quartz schist in marble of the Spruce Creek sequence in the downthrown block. (Bundtzen, 1981; Hawley and Associates, 1978; Thornsberry, McKee, and Salisbury, 1984, fig. K-2). The occurrence consists of altered quartzite that contains galena and pyrite. A representative chip sample of mineralized quartz schist contained 1.8 percent lead, 60 ppm silver, and 0.3 ppm gold (Hawley and Associates, 1978, sample no. 209). Stream-sediment samples (nos. 202 and 203) collected upstream of the locality are weakly anomalous in lead, zinc, and silver.
Workings: Hawley and Associates (1978) collected rock and stream-sediment samples in 1976. There are no workings.
Age: The deposit is assumed to be Eocene (see record MM091).
Alteration: Silicified and sulfidized quartz schist in marble.
Commodities (Major) - Ag, Pb; (Minor) - Au
Development Status: None
Deposit Model: Polymetallic replacement deposit (Cox and Singer, 1986; model 19a).
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.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Galena | 2.CD.10 | PbS |
| ⓘ | Pyrite | 2.EB.05a | FeS2 |
| 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 | ⓘ Galena | PbS |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | MM085 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- North America PlatformPassive Margin
- Yukon-Tanana lower DomainDomain
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