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Snowslide Gulch Prospect (ARDF - JU045), Juneau Mining District, Juneau, Alaska, USAi
| Regional Level Types | |
|---|---|
| Snowslide Gulch Prospect (ARDF - JU045) | Prospect |
| Juneau Mining District | Mining District |
| Juneau | City Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
58° 50' 16'' North , 135° 2' 56'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Location: This prospect is in Snowslide Gulch at an elevation of 915 feet. It is 2.5 miles northwest of Berners Bay and 1/3 mile south of the Jualin Mine (JU044) in the NE1/4 section 15, T. 35 S., R. 62 E. of the Copper River Meridian. The location is accurate.
Geology: The Snowslide Gulch prospect was probably explored in the early 1900's by a 115-foot adit. The deposit consists of pyrite disseminated in quartz-chlorite phyllite, and of pyrite in a bluish quartz vein. The vein is in a shear zone in the phyllite. No significant metal values were obtained from U.S. Bureau of Mines samples (Redman and others, 1989). The Snowslide prospect is in the Jualin Mine (see JU044) area currently (2001) controlled by Coeur Alaska. It is in the Berners Bay district at the north end of the Juneau Gold Belt. The district is characterized by a series of structurally-controlled, mesothermal, gold-bearing quartz veins. Most of the veins are in Early Cretaceous (105 Ma) Jualin Diorite, which intrudes Mesozoic (Upper Triassic) metabasalt. The veins are both extensional and shear and generally strike north to northwest and dip east. Discrete vein systems are defined by one or more through-going quartz veins, many of which are in shear zones (Miller and others, 1995). Hydrothermal muscovite from veins at the Jualin mine are 53.2 Ma to 55.5 Ma (Miller and others, 1994). This coincides with the 55 Ma age of the other mesothermal gold veins in the Juneau Gold Belt (Goldfarb and others, 1997).
Workings: The Snowslide Gulch prospect was probably explored in the early 1900's by a 115-foot adit. The prospect is currently (2001) controlled by Coeur Alaska.
Age: Hydrothermal muscovite from veins in the Jualin mine are 53.2 Ma to 55.5 Ma (Miller and others, 1994). This coincides with the 55 Ma age of the other mesothermal gold veins in the Juneau Gold Belt (Goldfarb and others, 1997).
Alteration: Sericitic and chloritic.
Commodities (Major) - Au
Development Status: None
Deposit Model: Low-sulfide Au-quartz vein (Cox and Singer, 1986; model 36a)
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.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | 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 | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Pyrite | FeS2 |
Other Databases
| Link to USGS - Alaska: | JU045 |
|---|
Other Regions, Features and Areas containing this locality
North AmericaContinent
- Coast MountainsMountain Range
North America PlateTectonic Plate
- Taku DomainDomain
- Yukon-TananaVolcanic Arc
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