Jack Bay #3 Prospect, Copper River Mining District, Valdez-Cordova Census Area, Alaska, USAi
| Regional Level Types | |
|---|---|
| Jack Bay #3 Prospect | Prospect |
| Copper River Mining District | Mining District |
| Valdez-Cordova Census Area | Census Area |
| Alaska | State |
| USA | Country |
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Latitude & Longitude (WGS84):
60° 58' 11'' North , 146° 27' 0'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Valdez | 3,870 (2017) | 18.7km |
Mindat Locality ID:
198189
Long-form identifier:
mindat:1:2:198189:9
GUID (UUID V4):
85d7c361-27d8-4cc8-b925-69606d0c46dd
Site is in the Chugach National Forest.
Location: The Jack Bay #3 prospect is at an elevation of about 2000 feet, approximately 2.2 miles north of Silver Lake. It is in the NW1/4 sec. 27, T. 10 S., R. 7 W., of the Copper River Meridian. The location is accurate to within 2000 ft. This prospect is shown as C-95 in Jansons and others (1984).
Geology: The area of this prospect is underlain by Upper Cretaceous Valdez Group metasedimentary rocks (Nelson and others, 1985). A well-defined quartz vein, 6 inches to 3 feet thick and traceable in outcrops for several hundred yards, cross cuts thick-bedded fine-grained graywacke. The vein contains small amounts of arsenopyrite(?) and native gold. Gold mineralization in veins cutting the rocks of the Valdez Group is interpreted by Goldfarb and others (1992) to be the result of Tertiary metamorphism.
Workings: Surface workings could not be found at this site (Jansons and others, 1984).
Age: Tertiary based on the age of the mineralizing event (Goldfarb and others, 1992).
Commodities (Major) - Au
Development Status: Undet.
Deposit Model: Chugach-type low-sulfide Au-quartz veins (Bliss, 1992; model 36a.1; Goldfarb an
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.
Detailed Mineral List:
| ⓘ Arsenopyrite ? Formula: FeAsS |
| ⓘ Gold Formula: Au |
| ⓘ 'Limonite' |
| ⓘ Quartz Formula: SiO2 |
Gallery:
List of minerals arranged by Strunz 10th Edition classification
| Group 1 - Elements | |||
|---|---|---|---|
| ⓘ | Gold | 1.AA.05 | Au |
| Group 2 - Sulphides and Sulfosalts | |||
| ⓘ | Arsenopyrite ? | 2.EB.20 | FeAsS |
| Group 4 - Oxides and Hydroxides | |||
| ⓘ | Quartz | 4.DA.05 | SiO2 |
| Unclassified | |||
| ⓘ | 'Limonite' | - | |
List of minerals for each chemical element
| O | Oxygen | |
|---|---|---|
| O | ⓘ Quartz | SiO2 |
| Si | Silicon | |
| Si | ⓘ Quartz | SiO2 |
| S | Sulfur | |
| S | ⓘ Arsenopyrite | FeAsS |
| Fe | Iron | |
| Fe | ⓘ Arsenopyrite | FeAsS |
| As | Arsenic | |
| As | ⓘ Arsenopyrite | FeAsS |
| Au | Gold | |
| Au | ⓘ Gold | Au |
Other Databases
| Link to USGS - Alaska: | CV025 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Yakutat-Malaspina DomainDomain
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References
