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Fortune Mine, Dolomi Mountain, Prince of Wales Island, Ketchikan Mining District, Prince of Wales-Hyder Census Area, Alaska, USAi
Regional Level Types
Fortune MineMine
Dolomi MountainMountain
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° 8' 35'' North , 132° 2' 52'' West
Latitude & Longitude (decimal):
55.14306,-132.04778
GeoHash:
G#: c1f1enmxx
GRN:
N37W56
Type:
Mine
Köppen climate type:
Cfb : Temperate oceanic climate
Nearest Settlements:
PlacePopulationDistance
Metlakatla1,405 (2017)30.1km
Ketchikan8,197 (2017)33.6km
Saxman417 (2017)34.6km
Mindat Locality ID:
197520
Long-form identifier:
mindat:1:2:197520:1
GUID (UUID V4):
0


Location: The Fortune Mine is located 1.8 km (5,800 feet) ESE of Dolomi Mountain (coordinates of record), about 0.2 mile W of Lake Williams and about 0.1 mile S of James Lake. It is near the SE corner of section 31, T77S, R89E.

Geology: As described by Brooks (1902), Wright and Wright (1908), Smith (1914), Chapin (1916), and Brooks and Capps (1924), the deposit at the Fortune Mine consists of 3 quartz veins 1 to 2 feet thick in graphitic schist with bands of marble. The veins strike N30W to N60W and dip 10 to 25N. They contain minor tetrahedrite, chalcopyrite, and pyrite. The Fortune Mine consists of a shallow shaft and several open cuts. There were small test shipments, one as late as 1922, but apparently no significant production. The schist and marble are part of the Wales Group of Late Proterozoic and Cambrian age (Herreid, 1967). The geology of the Dolomi area is dominated by an arcuate, generally north-trending, fault system and by a large dome centered over the eastern third of Paul Lake (Herreid, 1967). The Wales Group country rocks consist chiefly of several marble layers 200 to 1300 feet thick, interbedded with calcareous chlorite schist and marble.

Workings: The Fortune Mine consists of a shallow shaft and several open cuts.
Age: Veins are younger than the Late Proterozoic or Cambrian host rocks.
Production: There were small test shipments, one as late as 1922, but apparently no significant production.

Reserves: None.

Commodities (Major) - Ag, Au; (Minor) - Cu, Sb

Development Status: Yes; small

Deposit Model: Low-sulfide gold-quartz vein (Cox and Singer, 1986; model 36a).

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


4 valid minerals.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘNative Gold1.AA.05Au
Group 2 - Sulphides and Sulfosalts
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrite2.EB.05aFeS2
ⓘ'Tetrahedrite Subgroup'2.GB.05Cu6(Cu4C2+2)Sb4S12S
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2

List of minerals for each chemical element

OOxygen
Oⓘ QuartzSiO2
SiSilicon
Siⓘ QuartzSiO2
SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ PyriteFeS2
Sⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
FeIron
Feⓘ ChalcopyriteCuFeS2
Feⓘ PyriteFeS2
CuCopper
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
SbAntimony
Sbⓘ Tetrahedrite SubgroupCu6(Cu4C22+)Sb4S12S
AuGold
Auⓘ Native GoldAu

Other Databases

Link to USGS - Alaska:CR205

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. Brooks, A.H., and Capps, S.R., 1924, The Alaska mining industry in 1922: U.S. Geological Survey Bulletin 755-A, p. 1-56. 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. Herreid, Gordon, 1967, Geology and mineral deposits of the Dolomi area, Prince of Wales Island, Alaska: Alaska Division of Mines and Minerals Geologic Report 27, 17 p. Smith, P.S., 1914, Lode mining in the Ketchikan region, Alaska: U.S. Geological Survey Bulletin 592-B, p. 75-94. Wright, F.E., and Wright, C.W., 1908, The Ketchikan and Wrangell mining districts, Alaska: U.S. Geological Survey Bulletin 347, 210 p.
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