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Unnamed Occurrence (ARDF - TK090; near Little Falls Creek), Yentna Mining District, Matanuska-Susitna Borough, Alaska, USAi
Regional Level Types
Unnamed Occurrence (ARDF - TK090; near Little Falls Creek)- not defined -
Yentna Mining DistrictMining District
Matanuska-Susitna BoroughBorough
AlaskaState
USACountry

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Latitude & Longitude (WGS84):
62° 28' 19'' North , 148° 39' 32'' West
Latitude & Longitude (decimal):
62.47194,-148.65889
GeoHash:
G#: ben73htvk
GRN:
N42W52
Köppen climate type:
ET : Tundra
Mindat Locality ID:
201805
Long-form identifier:
mindat:1:2:201805:1
GUID (UUID V4):
0


MAS/MIL number 20760015.
Location: This occurrence is at an elevation of about 1,980 feet at the junction of the a creek that is locally called Little Falls Creek and the Talkeetna River, about 6 miles below the mouth of Yellowjacket Creek. The occurrence is near the center of sec. 35, T. 28 N., R. 4 E., Seward Meridian. The location is accurate. This is locality 46 of Csejtey and Miller (1978).
Geology: This occurrence consists of argillite that has a 1-foot-wide gossan that contains a pyritic zone with minor chalcopyrite (Rose, 1967). The argillite is interlayered with a greenstone unit that is estimated to be 11,000 feet thick (Anderson, 1969).
Workings: Work is limited to surface examinations. As of January 1, 2000, there were 3 active state mining claims in section 35 (Northern Associates Inc., written Commun., 2001).
Alteration: Gossan.

Commodities (Major) - Cu
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


2 valid minerals.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘChalcopyrite2.CB.10aCuFeS2
ⓘPyrite2.EB.05aFeS2

List of minerals for each chemical element

SSulfur
Sⓘ ChalcopyriteCuFeS2
Sⓘ PyriteFeS2
FeIron
Feⓘ ChalcopyriteCuFeS2
Feⓘ PyriteFeS2
CuCopper
Cuⓘ ChalcopyriteCuFeS2

Other Databases

Link to USGS - Alaska:TK090

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

Anderson, R.E., 1969, Preliminary geochemistry and geology of the Little Falls Creek area, Talkeetna Mountains quadrangle, Alaska: Alaska Division of Mines and Geology Geochemical Report 19, 16 p., 1 plate, scale 1:45,000. Cobb, E.H., 1972, Metallic mineral resources map of the Talkeetna Mountains quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-370, 1 sheet, scale 1:250,000. 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. 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. Rose, A.W., 1967, Geology of an area on the upper Talkeetna River, Talkeetna Mountains quadrangle, Alaska: Alaska Division of Mines and Minerals Geologic Report 32, 7 p., 1 plate, 1:63,360. 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,
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