Unnamed Occurrence (ARDF - TR009; on Mt. Brundage), Juneau Mining District, Juneau, Alaska, USA i
Regional Level Types
Unnamed Occurrence (ARDF - TR009; on Mt. Brundage) - not defined -
Juneau Mining District Mining District
Juneau City Borough
Alaska State
USA Country

Regional Level Types
Unnamed Occurrence (ARDF - TR009; on Mt. Brundage)	- not defined -
Juneau Mining District	Mining District
Juneau	City Borough
Alaska	State
USA	Country

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Latitude & Longitude (WGS84):

58° 16' 16'' North , 133° 20' 45'' West

Latitude & Longitude (decimal):

G#: c435mxutb

Köppen climate type:

Mindat Locality ID:

201864

Long-form identifier:

mindat:1:2:201864:8

GUID (UUID V4):

Location: This occurrence is on the south flank of Mt. Brundage near the international boundary. It is near the center of the W1/2 section 32, T.41 S., R.74 E. of the Copper River Meridian. This is location T007 of Wells and others (1986). The location is accurate within 1/4 mile.
Geology: This occurrence is in the Coast Range plutonic-metamorphic complex which consists of high-grade schist and gneiss intruded by Cretaceous and Tertiary granodiorite (Brew and Ford, 1984). Brew and Ford (1985) describe the area as consisting predominately of sphene-bearing, biotite-hornblende granodiorite associated with a pendant of marble and calc-silicate granofels on the southwest flank of Mt. Brundage. Wells and others (1986), report traces of chalcopyrite and pyrrhotite in iron-stained siliceous gneiss here. Samples of this gneiss collected by the U.S. Geological Survey contain minor pyrrhotite and traces of chalcopyrite, but no significant metal values (Cobb, 1978 [OFR 78-698]).
Alteration: Local iron staining.

Commodities (Major) - Cu
Development Status: No

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

ⓘ Pyrrhotite

2 valid minerals.

Detailed Mineral List:

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

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

ⓘ Pyrrhotite

Formula: Fe_1-xS

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
ⓘ	Pyrrhotite	2.CC.10	Fe_1-xS

List of minerals for each chemical element

S	Sulfur
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Pyrrhotite	Fe_1-xS
Fe	Iron
Fe	ⓘ Chalcopyrite	CuFeS₂
Fe	ⓘ Pyrrhotite	Fe_1-xS
Cu	Copper
Cu	ⓘ Chalcopyrite	CuFeS₂

Other Databases

Link to USGS - Alaska:	TR009

Other Regions, Features and Areas containing this locality

North AmericaContinent

Coast MountainsMountain Range

North America PlateTectonic Plate

Coast plutonic complexVolcanic Arc

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., 1984, The northern Coast plutonic-metamorphic complex, southeastern Alaska and northwestern British Columbia, in Coonrad, W.C., and Elliott, R.L., eds., The United States Geological Survey in Alaska--Accomplishments during 1981: U.S. Geological Survey Circular 868, p. 120-124. 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. Cobb, E.H., 1978, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Sumdum and Taku River quadrangles, Alaska: U.S. Geological Survey Open-File Report 78-698, 64 p. 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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