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Friendship Prospect, South Arm of Cholmondeley Sound, Cholmondeley Sound, Prince of Wales Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
Regional Level Types
Friendship ProspectProspect
South Arm of Cholmondeley Sound- not defined -
Cholmondeley SoundBay
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° 13' 5'' North , 132° 18' 50'' West
Latitude & Longitude (decimal):
55.21806,-132.31389
GeoHash:
G#: c1cfjh5uq
GRN:
N37W56
Type:
Prospect
Köppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Hollis112 (2011)42.8km
Thorne Bay483 (2017)53.8km
Mindat Locality ID:
197577
Long-form identifier:
mindat:1:2:197577:5
GUID (UUID V4):
0


Location: The Friendship prospect is just above the shoreline on the west side of the South Arm of Cholmondeley Sound, about 2.4 miles southwest of its mouth. It is about 0.4 mile south-southwest of the center of section 4, T. 77 S., R. 87 E. The Friendship prospect is sometimes described together with the Ruby Tuesday prospect (CR169) about 0.4 mile to the west.
Geology: The Friendship prospect has been known since before 1902 (Brooks, 1902) but little work has been done on it since then. The workings consist of a flooded pit and a shaft about 15 feet deep (Maas and others, 1991). The rocks in the vicinity consist of marble and greenschist of the Wales Group of Late Proterozoic and Cambrian age (Herreid and others, 1978). As described by Maas and others (1991), the deposit consists of a quartz-calcite vein 1.1 to 3.8 feet thick, with chalcopyrite, azurite, and malachite. One wall of the vein is marble, the other is felsic schist. The vein is along a shear zone that strikes N20-30E and has a steep dip. Seven samples contained 2,574 parts per million (ppm) to 0.456 ounce of gold per ton, and several contained more than 2 percent copper. The highest gold value in a 3.6-foot sample of the vein was 0.456 ounce per ton; the highest copper value in a 1-foot sample was 3.91 percent. There was negligible silver, lead, or zinc.
Workings: The workings consist of a flooded pit and a shaft about 15 feet deep.

Commodities (Major) - Au, Cu
Development Status: None
Deposit Model: Calcite-quartz vein with copper minerals.

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


5 valid minerals.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘChalcopyrite2.CB.10aCuFeS2
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘCalcite5.AB.05CaCO3
ⓘAzurite5.BA.05Cu3(CO3)2(OH)2
ⓘMalachite5.BA.10Cu2(CO3)(OH)2

List of minerals for each chemical element

HHydrogen
Hⓘ AzuriteCu3(CO3)2(OH)2
Hⓘ MalachiteCu2(CO3)(OH)2
CCarbon
Cⓘ AzuriteCu3(CO3)2(OH)2
Cⓘ CalciteCaCO3
Cⓘ MalachiteCu2(CO3)(OH)2
OOxygen
Oⓘ AzuriteCu3(CO3)2(OH)2
Oⓘ CalciteCaCO3
Oⓘ MalachiteCu2(CO3)(OH)2
Oⓘ QuartzSiO2
SiSilicon
Siⓘ QuartzSiO2
SSulfur
Sⓘ ChalcopyriteCuFeS2
CaCalcium
Caⓘ CalciteCaCO3
FeIron
Feⓘ ChalcopyriteCuFeS2
CuCopper
Cuⓘ AzuriteCu3(CO3)2(OH)2
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ MalachiteCu2(CO3)(OH)2

Other Databases

Link to USGS - Alaska:CR170

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

Brooks, A.H., 1902, Preliminary report on the Ketchikan mining district, Alaska, with an introductory sketch of the geology of southeastern Alaska: U.S. Geological Survey Professional Paper 1, 120 p. 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. 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. Kucinski, R.M., 1987, Geology and mineralization of the Ruby Tuesday claim block, Prince of Wales Island, southeast Alaska: Fairbanks, University of Alaska, M.Sc. thesis, 93 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. 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. Wright, F.E., and Wright, C.W., 1906, Lode mining in southeastern Alaska: U.S. Geological Survey Bulletin 284, p. 30-54.
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