Hope Prospect, Juneau Mining District, Juneau, Alaska, USAi
| Regional Level Types | |
|---|---|
| Hope Prospect | Prospect |
| Juneau Mining District | Mining District |
| Juneau | City Borough |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
58° 52' 53'' North , 135° 6' 0'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Mindat Locality ID:
198042
Long-form identifier:
mindat:1:2:198042:7
GUID (UUID V4):
18f5d81f-bb3d-484b-86d8-bb1d74f6feb1
Location: The Hope prospect is at an elevation of about 2,350 feet, in the Kakuhan Range, 2 miles northeast of Pt. Sherman on Lynn Canal and 1 mile west of Lions Head Mountain. It is approximately 0.2 mile east-southeast of the Ivanhoe Mine in the NE1/4 section 32, T. 34 S., R. 62 E. of the Copper River Meridian. The location is accurate.
Geology: The Hope prospect was discovered in 1895 and by 1902 was developed by 2 adits and an open cut. The prospect is an east-west-trending quartz vein in metamorphosed basalt, unlike most other veins in the Berners Bay district which typically are hosted in Jualin Diorite. The vein is 8 feet thick in one adit. Samples contain up to 25 ppm gold (Redman and others, 1989). The Hope prospect is within 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 Lower Cretaceous Jualin Diorite, which intrudes Mesozoic (Upper Triassic) metabasalt (Miller and others, 1995). The age of mineralization in the Berners Bay area is about 55 Ma, the same as the other mesothermal gold vein deposits in the Juneau Gold Belt (Goldfarb and others, 1997).
Workings: The Hope prospect was discovered in 1895 and by 1902 it had 2 adits and an open cut.
Age: The age of mineralization in the Berners Bay district is about 55 Ma, the same as the other mesothermal gold-quartz-vein deposits in the Juneau Gold Belt (Goldfarb and others, 1997).
Commodities (Major) - Au; (Minor) - Ag, Cu
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
3 valid minerals.
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 2 - Sulphides and Sulfosalts | |||
|---|---|---|---|
| ⓘ | Chalcopyrite | 2.CB.10a | CuFeS2 |
| ⓘ | 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 | ⓘ Chalcopyrite | CuFeS2 |
| S | ⓘ Pyrite | FeS2 |
| Fe | Iron | |
| Fe | ⓘ Chalcopyrite | CuFeS2 |
| Fe | ⓘ Pyrite | FeS2 |
| Cu | Copper | |
| Cu | ⓘ Chalcopyrite | CuFeS2 |
Other Databases
| Link to USGS - Alaska: | JU022 |
|---|
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References
