Unnamed Occurrence (ARDF - JU012; southeast of upper Berg Creek), Glacier Bay Mining District, Juneau Mining District, Alaska, USA i
Regional Level Types
Unnamed Occurrence (ARDF - JU012; southeast of upper Berg Creek) - not defined -
Glacier Bay Mining District - not defined -
Juneau Mining District Mining District
Alaska State
USA Country

Regional Level Types
Unnamed Occurrence (ARDF - JU012; southeast of upper Berg Creek)	- not defined -
Glacier Bay Mining District	- not defined -
Juneau Mining District	Mining District
Alaska	State
USA	Country

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Latitude & Longitude (WGS84):

58° 55' 57'' North , 135° 39' 18'' West

Latitude & Longitude (decimal):

G#: bfrx30749

Köppen climate type:

Dfc : Subarctic climate

Nearest Settlements:

Place	Population	Distance
Mud Bay	212 (2011)	29.9km
Haines	1,713 (2015)	35.8km

Mindat Locality ID:

200942

Long-form identifier:

mindat:1:2:200942:4

GUID (UUID V4):

68d7175b-8586-4c21-bb85-d7e81f0dfb94

Location: This occurrence is at an elevation of about 2,500 feet, 2.5 miles southeast of Berg Mountain on the east side of the Berg Creek drainage. It is in the SE1/4 section 12, T. 34 S, R. 58 E. of the Copper River Meridian. This is location J016 of Wells and others (1986). The location is accurate within 1/2 mile.
Geology: The rocks in the vicinity of this occurrence are predominantly Silurian and Devonian greenstones and other metavolcanic rocks (Brew and Ford, 1985). Cobb (1978 [OFR 78-374]) reports that a boulder containing pyrite and chalcopyrite was found in glacial moraine at this location. The rocks in the vicinity of this occurrence are deformed and metamorphosed Silurian or Devonian carbonate, clastic and volcanic clastic units that have been intruded by Upper Jurassic and Lower Cretaceous granitic and dioritic rocks (Brew and others, 1992).

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.

ⓘ Copper

Mineral List

ⓘ Chalcopyrite

ⓘ Pyrite

2 valid minerals.

Detailed Mineral List:

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

(2008) Alaska Resource Data File (ARDF) Open-File Report 2008-1225. US Geological Survey

ⓘ Pyrite

Formula: FeS₂

References:

(2008) Alaska Resource Data File (ARDF) Open-File Report 2008-1225. US Geological Survey

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂
ⓘ	Pyrite	2.EB.05a	FeS₂

List of minerals for each chemical element

S	Sulfur
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Pyrite	FeS₂
Fe	Iron
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Pyrite	FeS₂
Cu	Copper
Cu	ⓘ Chalcopyrite	CuFeS₂

Other Databases

Link to USGS - Alaska:	JU012

Other Regions, Features and Areas containing this locality

North America

Coast MountainsMountain Range

North America PlateTectonic Plate

Alexander DomainDomain

USA

Alaska
- Juneau Mining DistrictMining District

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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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