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Unnamed Cu prospect, Keete Inlet, Prince of Wales Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
Regional Level Types
Unnamed Cu prospectProspect
Keete Inlet- not defined -
Prince of Wales IslandIsland
Ketchikan Mining DistrictMining District
Prince of Wales-Hyder Census AreaCensus Area
AlaskaState
USACountry

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Latitude & Longitude (WGS84):
55° 4' 52'' North , 132° 29' 20'' West
Latitude & Longitude (decimal):
55.08111,-132.48889
GeoHash:
G#: c1cc35hw9
GRN:
N37W57
Type:
Prospect
Köppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Hydaburg391 (2017)25.7km
Hollis112 (2011)53.7km
Mindat Locality ID:
202121
Long-form identifier:
mindat:1:2:202121:1
GUID (UUID V4):
0


Location: This prospect consists of a flooded shaft just above tidewater, about 0.3 mile SSW of the west head of Keete Inlet. It is about 0.4 mile NW of the center of sec. 29, T78S, R86E.

Geology: Chapin (1916) originally described this deposit as a 'shear zone' with chalcopyrite, pyrite, and possibly bornite. The only working is a (shallow?) shaft that was flooded in 1915. Maas and others (1991, 1995) describe the deposit as a 1- to 2-foot-thick, copper-bearing, massive sulfide layer between altered chlorite schist and sericite schist of the Wales Group of Late Proterozoic and Cambrian age (Herreid and others, 1978). The sulfides also are disseminated in the wall rock. A 1.1-foot sample near the old shaft contained 1.23 parts per million (ppm) gold, 10.7 ppm silver, and 0.29 percent copper (Maas and others, 1991). There is no record of production. Recent detailed geochemical and isotopic work by Slack and others (2002) confirm that the deposit is of Late Proterozoic or Cambrian age.

Workings: The only working is a shaft sunk before 1916.

Age: Probably contemporaneous with deposition of the Late Proterozoic or Cambrian host rocks.

Alteration: Unspecified alteration of schist host rocks.

Commodities (Major) - Cu

Development Status: None

Deposit Model: Volcanogenic massive sulfide (Cox and Singer, 1986; model 28a).

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity 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
ⓘBornite ?2.BA.15Cu5FeS4
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrite2.EB.05aFeS2

List of minerals for each chemical element

SSulfur
Sⓘ BorniteCu5FeS4
Sⓘ ChalcopyriteCuFeS2
Sⓘ PyriteFeS2
FeIron
Feⓘ BorniteCu5FeS4
Feⓘ ChalcopyriteCuFeS2
Feⓘ PyriteFeS2
CuCopper
Cuⓘ BorniteCu5FeS4
Cuⓘ ChalcopyriteCuFeS2

Other Databases

Link to USGS - Alaska:CR167

Other Regions, Features and Areas containing this locality

North America PlateTectonic Plate

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

References

Chapin, Theodore, 1916, Mining developments in southeastern Alaska: U.S. Geological Survey Bulletin 642-B, p. 73-104.
Cobb, E. H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Craig quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-869, 262 p.
ARDF - CR167.
Herreid, Gordon, Bundtzen, T.K., and Turner, D.L. (1978) Geology and geochemistry of the Craig A-2 quadrangle, Prince of Wales Island, southeastern Alaska. Alaska Division of Geological and Geophysical Surveys Geologic Report 48, 49 p.
Maas, K.M., Still, J. C., Clough, A. H., and Oliver, L.K. (1991) Mineral investigations in the Ketchikan mining district, Alaska, 1990: Southern Prince of Wales Island and vicinity--Preliminary sample location maps and descriptions. U.S. Bureau of Mines Open-File Report 33-91, 139 p.
Maas, K.M., Bittenbender, P.E., and Still, J.C. (1995) Mineral investigations in the Ketchikan mining district, southeastern Alaska. U.S. Bureau of Mines Open-File Report 11-95, 606 p.
Slack, J.F., Shanks, W.C. III, Karl, S.M., Ridley, W.I., and Bittenbender, P.E. (2002), Geochemical and sulfur isotope compositions of Late Proterezoic and early Paleozoic volcanogenic massive sulfide deposits, Prince of Wales Island and vicinity, southeastern Alaska (abs.): Geological Society of America, Abstracts with Programs: 34(6): 113.
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