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Unnamed Occurrence (ARDF - JU042; north of Endicott Lake), Glacier Bay Mining District, Juneau Mining District, Alaska, USAi
Regional Level Types
Unnamed Occurrence (ARDF - JU042; north of Endicott Lake)- not defined -
Glacier Bay Mining District- not defined -
Juneau Mining DistrictMining District
AlaskaState
USACountry

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Latitude & Longitude (WGS84):
58° 50' 37'' North , 135° 40' 33'' West
Latitude & Longitude (decimal):
58.84361,-135.67583
GeoHash:
G#: bfrwb85ug
GRN:
N40W52
Köppen climate type:
Dfc : Subarctic climate
Nearest Settlements:
PlacePopulationDistance
Mud Bay212 (2011)39.1km
Haines1,713 (2015)45.6km
Gustavus434 (2017)48.0km
Mindat Locality ID:
200951
Long-form identifier:
mindat:1:2:200951:6
GUID (UUID V4):
0


Location: This occurrence is at an elevation of about 3,150 feet, approximately 1 mile north of Endicott Lake and 1 mile northeast of Endicott Gap, in the SW1/4 section 12, T. 35 S., R. 58 E. of the Copper River Meridian. This is location J022 of Wells and others (1986). The location is accurate within 1/4 mile.
Geology: 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). Cobb (1978 [78-374]) reports veinlets of bornite, secondary Cu minerals, and epidote associated with siliceous volcanic rocks.
Alteration: Oxidation of copper minerals.

Commodities (Major) - Cu
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
ⓘBornite2.BA.15Cu5FeS4

List of minerals for each chemical element

SSulfur
Sⓘ BorniteCu5FeS4
FeIron
Feⓘ BorniteCu5FeS4
CuCopper
Cuⓘ BorniteCu5FeS4

Other Databases

Link to USGS - Alaska:JU042

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., 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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