Lone Jack Prospect (ARDF - CR039), Karta River Wilderness, Prince of Wales Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
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Latitude & Longitude (WGS84):
55° 33' 48'' North , 132° 40' 44'' West
Latitude & Longitude (decimal):
Type:
Köppen climate type:
Nearest Settlements:
| Place | Population | Distance |
|---|---|---|
| Hollis | 112 (2011) | 2.8km |
| Thorne Bay | 483 (2017) | 17.0km |
| Klawock | 765 (2017) | 26.2km |
| Craig | 1,248 (2017) | 31.1km |
| Hydaburg | 391 (2017) | 40.7km |
This prospect is in the Karta River Wilderness Area, which is closed to exploration and mining.
Location: The Lone Jack prospect is at an elevation of about 400 feet, about 1.2 mile east-southeast of the mouth of McGilvery Creek on Salmon Lake. It is just north of the center of the southern boundary of section 5, T. 73 S., R. 84 E.
Geology: The Lone Jack prospect has a tunnel at an elevation of about 400 feet; large quartz boulders are on the dump (Roehm, 1938 [PE 119-8]. Between about 300 and 400 feet elevation, 2 parallel quartz veins in diorite are exposed for about 500 feet along a creek. Large masses of pyrite are scattered in the veins. Assays showed less than $1 per ton each in gold and silver. Maas and others (1995) collected several samples of quartz with minor pyrite and chalcopyrite that contained 20 to 1,850 parts per billion gold, 0.4 to 10.8 parts per million (ppm) silver, and 30 to 2,516 ppm copper. The rocks in the vicinity of this prospect are part of a large granodiorite-quartz diorite stock (Sainsbury, 1961; Eberlein and others, 1983; Brew, 1996). Early workers considered the stock to be Mesozoic or Cretaceous, but recent radiometric dating indicates that it is Devonian (S.M. Karl, oral communication, 2003).
Workings: At least one short adit.
Age: Unknown, other than that the veins are in Devonian granitic rocks.
Commodities (Major) - Ag, Au, Cu
Development Status: None
Deposit Model: Polymetallic vein (Cox and Singer, 1986; model 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 | |||
|---|---|---|---|
| ⓘ | 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: | CR039 |
|---|
Other Regions, Features and Areas containing this locality
North America PlateTectonic Plate
- Alexander DomainDomain
- Alexander TerraneVolcanic Arc
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