Location: This occurrence is situated at the uppermost drainage of Browns Fork at an elevation of 2,000 feet (609 m) in Section 11, T. 19 S., R. 26 E., of the Kateel River Meridian. Location is poorly known and judged to within a two mile (3.2 km) radius.
Geology: The Browns Fork occurrence(s) is a series of several poorly understood, copper-zinc anomalies in limestone of the Ordovician Novi Mountain formation (Dutro and Patton, 1982). No assay data is available.
Reserves: None.

Commodities (Major) - Cu, Zn
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

ⓘ Zinc

Mineral List

ⓘ Chalcopyrite

ⓘ Sphalerite

2 valid minerals.

Detailed Mineral List:

ⓘ Chalcopyrite

Formula: CuFeS₂

References:

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

ⓘ Sphalerite

Formula: ZnS

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
ⓘ	Sphalerite	2.CB.05a	ZnS
ⓘ	Chalcopyrite	2.CB.10a	CuFeS₂

List of minerals for each chemical element

S	Sulfur
S	ⓘ Chalcopyrite	CuFeS₂
S	ⓘ Sphalerite	ZnS
Fe	Iron
Fe	ⓘ Chalcopyrite	CuFeS₂
Cu	Copper
Cu	ⓘ Chalcopyrite	CuFeS₂
Zn	Zinc
Zn	ⓘ Sphalerite	ZnS

Other Databases

Link to USGS - Alaska:	MD007

Other Regions, Features and Areas containing this locality

North AmericaContinent

North America PlateTectonic Plate

Farewell-McGrath DomainDomain
Farewell TerranePassive Margin

USA

Alaska
- Yukon-Koyukuk Census Area
  - McGrath Mining DistrictMining District

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References

Dutro, J.T. Jr., and Patton,W.W. Jr., 1982, New Paleozoic formations in the northern Kuskokwim Mountains, west-central Alaska: U.S. Geological Survey Bulletin 1529-H, p. H13-H22.

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