Vote for your favorite mineral in #MinCup26! - Quartz vs. Asagiite
It's a classic vs a newbie as the most common named mineral in the crust Quartz is up against an exceedingly-rare sea foam-green mineral discovered just a few years ago Asagiite.
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Unnamed Prospect (ARDF - TK087; north tributary to East Fork; Iron Creek), Yentna Mining District, Matanuska-Susitna Borough, Alaska, USAi
Regional Level Types
Unnamed Prospect (ARDF - TK087; north tributary to East Fork; Iron Creek)- not defined -
Yentna Mining DistrictMining District
Matanuska-Susitna BoroughBorough
AlaskaState
USACountry

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Latitude & Longitude (WGS84):
62° 20' 58'' North , 148° 48' 57'' West
Latitude & Longitude (decimal):
62.34944,-148.81583
GeoHash:
G#: ben4tw7eg
GRN:
N42W52
Köppen climate type:
ET : Tundra
Mindat Locality ID:
202471
Long-form identifier:
mindat:1:2:202471:7
GUID (UUID V4):
0


Location: This prospect is at an elevation of about 4,000 feet on a southwest-flowing tributary to the East Fork, Iron Creek; it is about 1.8 miles west-southwest of VABM Sedan. The location is accurate to within 1/2 mile. This is locality 64 of Csejtey and Miller (1978) and locality 64 of Singer and others (1978).
Geology: This prospect consists of quartz float that contains pyrite, chalcopyrite, and possibly pyrrhotite. It is on or near a sheared contact, possibly a thrust fault, between Triassic(?) metavolcaniclastic rocks and Jurassic plutonic and metamorphic rocks (Csejtey and others, 1978; Schmidt and others, 2002). A float sample contains 7 parts per million silver, 0.9 part per million gold, and 5,000 parts per million copper (Miller and others, 1978).
Workings: Only surface sampling by the U.S. Geological Survey (Miller and others, 1978).

Commodities (Major) - Ag, Cu; (Minor) - Au
Development Status: None
Deposit Model: Basaltic Cu? (Cox and Singer, 1986; model 23?)

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 2 - Sulphides and Sulfosalts
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrrhotite2.CC.10Fe1-xS
ⓘPyrite2.EB.05aFeS2
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ⓘ PyrrhotiteFe1-xS
FeIron
Feⓘ ChalcopyriteCuFeS2
Feⓘ PyriteFeS2
Feⓘ PyrrhotiteFe1-xS
CuCopper
Cuⓘ ChalcopyriteCuFeS2

Other Databases

Link to USGS - Alaska:TK087

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 Csejtey, Bela, Jr., 1980, Summaries of data on and lists of references to metallic and selected nonmetallic mineral deposits in the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 80-716, 63 p. Csejtey, Bela, Jr., and Miller, R.J., 1978, Map and table describing metalliferous and selected nonmetalliferous mineral deposits in the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-558-B, 22 p., 1 sheet, scale 1:250,000. Csejtey, Bela, Jr., Nelson, W.H., Jones, D.L., Silberling, N.J., Dean, R.M., Morris, M.S., Lanphere, M.A., Smith, J.G., and Silberman, M.L, 1978, Reconnaissance geologic map and geochronology, Talkeetna Mountains quadrangle, northern part of Anchorage quadrangle, and southwest part of Healy quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-558-A, 60 p., 1 sheet, scale 1:250,000. Miller, R.J., Cooley, E.F., O'Leary, R.M., Garmezy, Larry, Csejtey, Bela, Jr., Smith, T.E., and Cleveland, M.N., 1978, Analysis of geochemical samples from the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-file Report 78-1052, 279 p., 3 sheets, scale 1:250,000. Schmidt, J.M., Werdon, M.B., and Wardlaw, B., 2002 (2003), New mapping near Iron Creek, Talkeetna Mountains, indicates presence of Nikolai Greenstone, in Clautice, K.H., ed., Short Notes on Alaska geology 2003: Alaska Division of Geological and Geophysical Surveys Professional Report 120, p. 101-108. Singer, D.A., Csejtey, Bela, Jr., and Miller, R.J., 1978, Map and discussion of the metalliferous and selected non-metalliferous mineral resources of the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Open-file Report 78-588-Q, 33 p., 1 sheet, scale 1:250,000.
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