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Unnamed Occurrence (ARDF - IL029; north of Upper Copper Lake), Bristol Bay Mining District, Lake and Peninsula Borough, Alaska, USAi
Regional Level Types
Unnamed Occurrence (ARDF - IL029; north of Upper Copper Lake)- not defined -
Bristol Bay Mining DistrictMining District
Lake and Peninsula BoroughBorough
AlaskaState
USACountry

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Latitude & Longitude (WGS84):
59° 36' 36'' North , 154° 8' 16'' West
Latitude & Longitude (decimal):
59.61000,-154.13778
GeoHash:
G#: bdd7he8m3
GRN:
N40W59
Köppen climate type:
Dfc : Subarctic climate
Mindat Locality ID:
200929
Long-form identifier:
mindat:1:2:200929:5
GUID (UUID V4):
0


Location: This occurrence is at an elevation of about 800 feet on an unnamed north tributary of Upper Copper Lake. The site is in the NE1/4 SW1/4 sec. 36, T. 6 S., R. 29 W., Seward Meridian. The location is accurate within about 0.5 mile. It is locality 12 of Detterman and Cobb (1972).
Geology: An unnamed north tributary to Upper Copper Lake drains a Tertiary, pyrite-rich granitic pluton that also contains disseminated flakes of molybdenite and chalcopyrite(?) (Reed, 1967). Stream-sediment samples collected by Reed in the area contained anomalous concentrations of copper, molybdenum, and silver, but he apparently did not analyze the mineralized intrusive rock. The granitic rock is extensively argillized and possibly sericitized.
Workings: Exploration in the area is limited to reconnaissance geologic mapping and collection of stream-sediment and possibly outcrop samples (Reed, 1967). Stream-sediment samples contained anomalous concentrations of copper, molybdenum, and silver.
Age: Tertiary.
Alteration: Granitic host rock is extensively argillized and possibly sericitized. Reed (1967) noted extensive 'hydrogen metasomatism.'

Commodities (Major) - Cu, Mo; (Minor) - Ag
Development Status: None
Deposit Model: Porphyry Cu-Mo? (Cox and Singer, 1986; model 21a).

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
ⓘChalcopyrite ?2.CB.10aCuFeS2
ⓘMolybdenite2.EA.30MoS2
ⓘPyrite2.EB.05aFeS2

List of minerals for each chemical element

SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ MolybdeniteMoS2
Sⓘ PyriteFeS2
FeIron
Feⓘ ChalcopyriteCuFeS2
Feⓘ PyriteFeS2
CuCopper
Cuⓘ ChalcopyriteCuFeS2
MoMolybdenum
Moⓘ MolybdeniteMoS2

Other Databases

Link to USGS - Alaska:IL029

Other Regions, Features and Areas containing this locality

North AmericaContinent
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

Cobb, E.H., and Reed, B.L., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska; Supplement to Open-File Report 76-485; Part A, Summaries to January 1, 1981: U.S. Geological Survey Open-File Report 81-1343-A, 25 p. Cobb, E.H., and Reed, B.L., 1981, Summaries of data on and lists of references to metallic and selected nonmetallic mineral occurrences in the Iliamna, Lake Clark, Lime Hills, and McGrath quadrangles, Alaska; Supplement to Open-File Report 76-485; Part B, Lists of references to Januray 1, 1981: U.S. Geological Survey Open-File Report 81-1343-B, 20 p. Detterman, R.L., and Cobb, E.H., 1972, Metallic mineral resources map of the Iliamna quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-364, 1 sheet, scale 1:250,000. MacKevett, E.M., Jr., and Holloway, C.D., 1977, Map showing metalliferous and selected non-metalliferous mineral deposits in the eastern part of southern Alaska: U.S. Geological Survey Open-File Report 77-169-A, 99 p., 1 sheet, scale 1:1,000,000. Reed, B.L., 1967, Results of stream sediment sampling and bedrock analyses in the eastern part of the Iliamna quadrangle, and at Kasna Creek, Lake Clark quadrangle, Alaska: U.S. Geological Survey Open-File Report 272, 18 p.
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