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Unnamed Occurrence (ARDF - JU008; east of Berg Mountain), Glacier Bay Mining District, Juneau Mining District, Alaska, USAi
Regional Level Types
Unnamed Occurrence (ARDF - JU008; east of Berg Mountain)- not defined -
Glacier Bay Mining District- not defined -
Juneau Mining DistrictMining District
AlaskaState
USACountry

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Latitude & Longitude (WGS84):
58° 57' 24'' North , 135° 42' 3'' West
Latitude & Longitude (decimal):
58.95667,-135.70083
GeoHash:
G#: bfrx2h9xm
GRN:
N40W52
Köppen climate type:
Dfc : Subarctic climate
Nearest Settlements:
PlacePopulationDistance
Mud Bay212 (2011)29.2km
Haines1,713 (2015)34.3km
Mindat Locality ID:
200940
Long-form identifier:
mindat:1:2:200940:0
GUID (UUID V4):
0


Location: This occurrence is approximately one mile east of Berg Mountain at an elevation of about 4,100 feet. It is in the NW1/4 section 2, T. 34 S., R. 58 E. of the Copper River Meridian. This is location J012 of Wells and others (1986). The location is accurate within 1/2 mile.
Geology: The rocks in the area are predominantly Silurian and Devonian greenstones and other metavolcanic rocks (Brew and Ford, 1985). Cobb (1978, [OFR 78-374]) reports disseminated pyrite in iron-stained siliceous rocks that contain traces of yttrium. An aeromagnetic anomaly occurs nearby (Wells and others, 1986). The area consists of deformed and metamorphosed Silurian or Devonian carbonate, clastic and volcanic clastic rocks that have been intruded by Upper Jurassic and Lower Cretaceous granitic and dioritic rocks (Brew and others, 1992).
Alteration: Local iron staining.

Commodities (Major) - Y
Development Status: None

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


1 valid mineral.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘPyrite2.EB.05aFeS2

List of minerals for each chemical element

SSulfur
Sⓘ PyriteFeS2
FeIron
Feⓘ PyriteFeS2

Other Databases

Link to USGS - Alaska:JU008

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

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

Brew, D.A., and Ford, A.B., 1985, Preliminary reconnaissance geologic map of the Juneau, Taku River, Atlin, and part of the Skagway 1:250,000 quadrangles, southeastern Alaska: U.S. Geological Survey Open-File Report 85-395, 23 p., 2 sheets, scale 1:250,000. Brew, D.A., Himmelberg, G.R., Loney, R.A., and Ford, A.B., 1992, Distribution and characteristics of metamorphic belts in the southeastern Alaska part of the North American Cordillera--Metamorphic styles in young and ancient orogenic belts: Journal of Metamorphic Geology, v. 10, no. 3, p. 465-482. Brew, D.A., Johnson, B.R., Grybeck, D., Griscom, A., Barnes, D.F., Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources of the Glacier Bay National Monument Wilderness Study Area, Alaska: U.S. Geological Survey Open-File Report 78-494, 670 p., 7 sheets. Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Juneau quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-374, 155 p. MacKevett, E.M., Jr., Brew, D.A., Hawley, C.C., Huff, L.C., and Smith, J.G., 1971, Mineral resources of Glacier Bay National Monument, Alaska: U.S. Geological Survey Professional Paper 632, 90 p., 12 plates, scale 1:250,000. Wells, D.E., Pittman, T.L., Brew, D.A. and Douglass, S.L., 1986, Map and description of the mineral deposits in the Juneau, Taku River, Atlin, and part of the Skagway quadrangles, Alaska: U.S. Geological Survey Open-File Report 85-717, 332 p., 1 sheet, scale 1:250,000.
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