Mystery Mountains West Occurrence, Yukon-Koyukuk Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Mystery Mountains West Occurrence | Occurrence |
| Yukon-Koyukuk Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
63° 30' 50'' North , 154° 39' 21'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
See Ursus prospect (MD033).
Location: The Mystery Mountains West occurrence is situated on a southwesterly spur in the western-most part of the Mystery Mountains about 0.6 miles (0.9 km) northwest of Cottonwood Creek, at an elevation of 1,650 feet (503 m) in Section 8, T. 23 S., R. 22 E., of the Kateel River Meridian. Location is accurate to within 500 feet (152 m).
Geology: The Mystery Mountains West occurrence consists of galena, sphalerite, and quartz in hornfels, and locally in quartz-tourmaline breccias in hornfels. Altered dikes cut the hornfels on the property. The Mystery Mountains West occurrence represents an outer-most metallic lead-zinc zonation observed in the Mystery Mountains mineralized area, which is thought to be a large-scale copper porphyry system. Prospects more central to the core, which include the Copenhagen Hill, Mystery Mountains-East, Frozen Creek, and Tarn prospects (MD030, MD028, MD032, MD027) are representative of a copper-gold bearing core. The Ursus prospect (MD033), like the Mystery Mountains West mineralization, represents a southern, outer lead-zinc zone (DiMarchi and others, 1997). The Mystery Mountains West occurrence is inferred to be Late Cretaceous, based on isotopic ages of plutonic rocks in Mystery Mountains (Moll and others, 1981). No assay data was found for this summary.
Workings: Mystery Mountains West is one of a number of prospects related to a large porphyry copper-gold target explored in the Mystery Mountains by WGM Inc., ACNC, and ASA Inc. from 1975 to 1997 (DiMarchi and others, 1997). No assay data was found for this summary.
Age: The Mystery Mountains West occurrence is inferred to be Late Cretaceous, based on isotopic ages of plutonic rocks in Mystery Mountains (Moll and others, 1981).
Alteration: Sericite in dike rocks.
Reserves: None.
Commodities (Major) - Pb, Zn; (Minor) - Ag
Development Status: No
Deposit Model: Polymetallic vein deposits (Cox and Singer, 1986; model no. 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
3 valid minerals.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Sphalerite | 2.CB.05a | ZnS |
| ⓘ | Galena | 2.CD.10 | PbS |
| 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 | ⓘ Sphalerite | ZnS |
| Zn | Zinc | |
| Zn | ⓘ Sphalerite | ZnS |
| Pb | Lead | |
| Pb | ⓘ Galena | PbS |
Other Databases
| Link to USGS - Alaska: | MD029 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
North America PlateTectonic Plate
- Farewell-McGrath DomainDomain
- Farewell TerranePassive Margin
USA
- Alaska
- Yukon-Koyukuk Census Area
- McGrath Mining DistrictMining District
- Yukon-Koyukuk Census Area
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