Elliott and Koch (1981, p. 13. loc. 41) show silver as a queried commodity at the Sunset prospect, but do not mention silver in their description of the deposit. Silver also is not mentioned in any of the earlier published descriptions of the prospect.
Location: The Sunset prospect is in Section 35 at an elevation of about 4700 feet on a west-facing mountainside above Ferguson Glacier (Elliott and Koch, 1981, p. 13, loc. 41). The location is probably accurate within about a quarter of a mile.
Geology: The country rocks in the area of the Sunset prospect are pelitic metasedimentary and subordinate andesitic metavolcanic strata of the Jurassic or older Mesozoic Hazelton Group, which is underlain and locally intruded by the Triassic Texas Creek Granodiorite (Smith, 1977; Koch, 1996). The deposit (Buddington, 1929, p. 109) consists of two sulfide-bearing quartz veins in Texas Creek Granodiorite near an isolated roof pendant of argillite and graywacke. One vein is 1-3 feet thick, has been traced on the surface for about 900 feet, and contains local concentrations of galena and pyrite. At one place, a shattered zone 20 feet wide contains about a five-foot width of quartz stringers carrying galena and pyrite. The other vein is about 3 feet thick, has been traced in outcrop for about 600 feet, and contains locally disseminated pyrite and a lens 4 inches thick and 12 feet long of pyrite, galena, and barite.
Workings: Early workings consisted of minor surface stripping.

Commodities (Major) - Ag?, Pb; (Minor) - Barite
Development Status: None
Deposit Model: Polymetallic veins

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.

ⓘ Barite (Barytes)

Mineral List

ⓘ Galena

ⓘ Pyrite

ⓘ Quartz

3 valid minerals.

Detailed Mineral List:

ⓘ Galena

Formula: PbS

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

ⓘ Quartz

Formula: SiO₂

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
ⓘ	Galena	2.CD.10	PbS
ⓘ	Pyrite	2.EB.05a	FeS₂
Group 4 - Oxides and Hydroxides
ⓘ	Quartz	4.DA.05	SiO₂

List of minerals for each chemical element

O	Oxygen
O	ⓘ Quartz	SiO₂
Si	Silicon
Si	ⓘ Quartz	SiO₂
S	Sulfur
S	ⓘ Galena	PbS
S	ⓘ Pyrite	FeS₂
Fe	Iron
Fe	ⓘ Pyrite	FeS₂
Pb	Lead
Pb	ⓘ Galena	PbS

Other Databases

Link to USGS - Alaska:	BC041

Other Regions, Features and Areas containing this locality

North AmericaContinent

Coast MountainsMountain Range

North America PlateTectonic Plate

StikiniaVolcanic Arc
Taku DomainDomain

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References

Buddington, A.F., 1929, Geology of Hyder and vicinity, southeastern Alaska, with a reconnaissance of Chickamin River: U.S. Geological Survey Bulletin 807, 124 p. Elliott, R.L., and Koch, R.D., 1981, Mines, prospects, and selected metalliferous mineral occurrences in the Bradfield Canal quadrangle, Alaska: U.S. Geological Survey Open-File Report 81-728-B, 23 p., 1 sheet, scales 1:250,000 and 1:63,360. Koch, R.D., 1996 [In press), Reconnaissance geologic map of the Bradfield Canal quadrangle, southeastern Alaska: U.S. Geological Survey Open-File Report, 1 sheet, scale 1:250,000. Smith, J.G., 1977, Geology of the Ketchikan D-1 and Bradfield Canal A-1 quadrangles, Alaska: U.S. Geological Survey Bulletin 1425, 49 p., 1 plate.

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