Location: The Two Genevieves prospect is on an east-facing bluff overlooking Cribby Creek, about 2.5 miles north of the Kuskokwim River. The prospect is at an elevation of about 730 feet, about 0.6 mile south-southeast of the center of section 18, T. 20 N., R. 44 W., of the Seward Meridian. The location is accurate within about 0.3 mile.
Geology: At the Two Genevieves prospect, an altered mafic sill largely composed of silica, mariposite, and carbonate minerals intrudes sandstone and shale of the Upper Cretaceous, Kuskokwim Group (Cady and others, 1955). Cinnabar and fragments of graphite occur in vugs and in a breccia zone in the upper part of the altered sill. According to Cady and others (1955), the Two Genevieves prospect is one of the few occurrences of graphite associated with cinnabar known in the Aniak district.
Workings: Only surface sampling and evaluation has taken place, mostly prior to 1952 (Cady and others, 1955; Cobb, 1976 [OFR 76-605]).
Alteration: Mafic sill altered to secondary silica, mariposite, and carbonate.

Commodities (Major) - Hg
Development Status: None
Deposit Model: Silica-carbonate mercury (Cox and Singer, 1986; model 27c).

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.

ⓘ Mercury

Mineral List

ⓘ Cinnabar

ⓘ Quartz

2 valid minerals.

Detailed Mineral List:

ⓘ Cinnabar

Formula: HgS

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
ⓘ	Cinnabar	2.CD.15a	HgS
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	ⓘ Cinnabar	HgS
Hg	Mercury
Hg	ⓘ Cinnabar	HgS

Other Databases

Link to USGS - Alaska:	SM027

Other Regions, Features and Areas containing this locality

North AmericaContinent

North America PlateTectonic Plate

Farewell buried DomainDomain
Farewell TerranePassive Margin

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

Cady, W.M., Wallace, R.E., Hoare, J.M., and Webber, E.J., 1955, The central Kuskokwim region, Alaska: U.S. Geological Survey Professional Paper 268, 132 p. Cobb, E.H., 1972, Metallic mineral resources map of the Sleetmute quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-368, 1 sheet, scale 1:250,000. Cobb, E.H., 1976, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Dillingham, Sleetmute, and Taylor Mountains quadrangles, Alaska: U.S. Geological Survey Open-File Report 76-606, 92 p. Gray, J.E., Gent, C.A., Snee, L.W., and Wilson, F.H., 1997, Epithermal mercury-antimony and gold-bearing vein lodes of southwest Alaska, in Goldfarb, R.J., and Miller, L.D., eds., Mineral Deposits of Alaska: Economic Geology Monograph 9, p. 287-305 Miller, M.L., Belkin, H.E., Blodgett, R.B., Bundtzen, T.K., Cady, J.W., Goldfarb, R.J., Gray, J.E., McGimsey, R.G., and Simpson, S.L., 1989, Pre-field study and mineral resource assessment of the Sleetmute quadrangle, southwestern Alaska: U.S. Geological Survey Open-File Report 89-363, 115 p., 3 plates, scale 1:250,000. Sainsbury, C.L. and MacKevett, E.M., Jr., 1965, Quicksilver deposits of southwestern Alaska: U.S. Geological Survey Bulletin 1187, 89 p. Wells, J.T., and Ghiorso, M.S., 1988, Rock alteration, mercury transport, and metal deposition at Sulphur Bank, California: Economic Geology, vol. 83, p. 606-618. White, D. E., and Robinson, C. E., 1962, Sulphur Bank, California, a major hot spring quicksilver deposit, in Engel, A.E.J., James, H.L., and Leonard, B.F., eds., Petrologic studies: A volume in honor of A.F. Buddington: Boulder, Colorado, Geological Society of America p. 397-428.

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