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Unnamed Occurrence (ARDF - MH206; south of Millers Roadhouse), Delta River Mining District, Southeast Fairbanks Census Area, Alaska, USAi
Regional Level Types
Unnamed Occurrence (ARDF - MH206; south of Millers Roadhouse)- not defined -
Delta River Mining DistrictMining District
Southeast Fairbanks Census AreaCensus Area
AlaskaState
USACountry

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Latitude & Longitude (WGS84):
63° 19' 57'' North , 145° 43' 47'' West
Latitude & Longitude (decimal):
63.33250,-145.72972
GeoHash:
G#: bg227c6fe
GRN:
N43W49
Köppen climate type:
Dsc : Dry-summer subarctic climate
Mindat Locality ID:
201260
Long-form identifier:
mindat:1:2:201260:8
GUID (UUID V4):
0


Location: This occurrence is at an elevation of 2,650 feet just east of the Richardson Highway approximately 2.5 miles south of Millers Roadhouse. It is in the NE1/4NE1/4 section 25, T. 18 S., R. 10 E., Fairbanks Meridian. The occurrence is described by Hanson (1963, locality 3), and it corresponds to locality 18 in Cobb (1979 [OFR 79-238]) and locality S103 in table 2 of Nokelberg and others (1991).
Geology: This occurrence consists of discontinuous and irregular quartz veins as much as 6 inches thick that contain disseminated chalcopyrite, galena, and pyrite (Hanson, 1963). Some of the chalcopyrite is oxidized to azurite and malachite. The veins cut metadacite of the Slana Spur Formation of Pennsylvanian age (Nokleberg and others, 1991). A grab sample of a three-quarter-inch quartz vein with chalcopyrite, malachite, and azurite contained 5,600 parts per million (ppm) copper, 180 ppm lead, 4,200 ppm zinc, 10 ppm silver, and 5,000 ppm arsenic (Nokleberg and others, 1991). Samples of the mineralized quartz veins assayed 0.4 to 0.5 percent copper, 0.4 to 0.5 percent lead, and a trace of gold (Hanson, 1963).
Workings: A grab sample of a three-quarter-inch quartz vein with chalcopyrite, malachite, and azurite contained 5,600 parts per million (ppm) copper, 180 ppm lead, 4,200 ppm zinc, 10 ppm silver, and 5,000 ppm arsenic (Nokleberg and others, 1991). Samples of the mineralized quartz veins assayed 0.4 to 0.5 percent copper, 0.4 to 0.5 percent lead, and a trace of gold (Hanson, 1963).
Age: Pennsylvanian or younger.

Commodities (Major) - Cu, Pb; (Minor) - Ag, As, Au
Development Status: None
Deposit Model: Polymetallic veins (Cox and Singer, 1986; model 22c).

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


6 valid minerals.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘGalena2.CD.10PbS
ⓘPyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
ⓘQuartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘ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ⓘ MalachiteCu2(CO3)(OH)2
OOxygen
Oⓘ AzuriteCu3(CO3)2(OH)2
Oⓘ MalachiteCu2(CO3)(OH)2
Oⓘ QuartzSiO2
SiSilicon
Siⓘ QuartzSiO2
SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ GalenaPbS
Sⓘ PyriteFeS2
FeIron
Feⓘ ChalcopyriteCuFeS2
Feⓘ PyriteFeS2
CuCopper
Cuⓘ AzuriteCu3(CO3)2(OH)2
Cuⓘ ChalcopyriteCuFeS2
Cuⓘ MalachiteCu2(CO3)(OH)2
PbLead
Pbⓘ GalenaPbS

Other Databases

Link to USGS - Alaska:MH206

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., 1979, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Mount Hayes quadrangle, Alaska: U.S. Geological Survey Open-File Report 79-238, 140 p. Hanson, L.G., 1963, Bedrock geology of the Rainbow Mountain area, Alaska Range, Alaska: Alaska Division of Mines and Minerals Geologic Report 2, 82 p., 2 plates. Nokleberg, W.J., Lange, I.M., Roback, R.C., Yeend, Warren, and Silva, S.R., 1991, Map showing locations of metalliferous lode and placer mineral occurrences, mineral deposits, prospects, and mines, Mount Hayes quadrangle, eastern Alaska Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1996-C, 42 p., 1 sheet, scale 1:250,000. Rose, A.W., 1965, Geology and mineral deposits of the Rainy Creek area, Mt. Hayes quadrangle, Alaska: Alaska Division of Mines and Minerals Geologic Report 14, 57 p., 1 sheet, scale 1:36,000.
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