Unnamed (on west side of Little Jarvis Glacier)

Site Name

Primary: Unnamed (on west side of Little Jarvis Glacier)

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Commodity

Primary: Zinc
Primary: Lead
Primary: Copper
Primary: Barium-Barite
Primary: Gold
Primary: Silver

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Location

State: Alaska
District: Juneau (Skagway subdistrict)

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Land Status

Not available

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Holdings

Not available

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Workings

Not available

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Ownership

Not available

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Production

Not available

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Deposit

Record Type: Site
Operation Category: Prospect
Operation Type: Unknown
Years of Production:
Organization:
Significant:

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Physiography

Not available

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Mineral Deposit Model

Model Name: Massive sulfide, kuroko
Model Name: Massive sulfide, Besshi (Japanese deposits)

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Orebody

Not available

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Structure

Not available

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Alterations

Not available

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Rocks

Not available

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Analytical Data

Not available

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Materials

Ore: Sphalerite
Ore: Pyrite
Ore: Galena
Ore: Barite

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Comments

Comment (Geology): Age = This prospect and other similar prospects in the Mt. Henry Clay area are probably correlative with the Windy Craggy deposit in Canada and the Greens Creek deposit on Admiralty Island and are therefore Late Triassic (Still, 1984 [OF 118-84]; Newberry and others, 1997).

Comment (Deposit): Model Name = Probably a Besshi- or Kuroko-type volcanogenic massive sulfide (Cox and Singer, 1986; models 28a or 24b).

Comment (Geology): Geologic Description = Still and others (1991) describe this prospect as small discontinuous sulfide bands in metasedimentary and metavolcanic rocks. Samples contained up to 0.345 ppm gold, 11.8 ppm silver, 13.6% zinc, 1,900 ppm copper, 3.8% lead, 1.44% barium, and 2,000 ppm arsenic. Rubicon Minerals (1998) interprets this prospect to occur on a northwest mineral trend along the apex of a shallowly plunging, northwest-trending antiform. This mineral trend extends from the unnamed occurrences (SK070) at the northwest end through the RW Zone prospect (SK067) and Main Zone/Palmer prospect (SK066) to the Red Creek prospect (SK063) at the southeast end. This prospect and other similar prospects in the Mt. Henry Clay area are probably correlative with the Windy Craggy deposit in Canada and the Greens Creek deposit on Admiralty Island and are therefore Late Triassic (Still and others, 1984 [OF 118-84]; Newberry and others, 1997).

Comment (Deposit): Other Comments = Still and others (1991) group this prospect with another one on the east side of Little Jarvis Glacier. In this compilation, the occurrence on the east side has been grouped with the RW Zone prospect (SK067) where Rubicon Minerals made the first drill discovery of ore grade massive sulfide mineralization in the area in 1999 (Rubicon Minerals, 1999).

Comment (Reference): Primary Reference = Still and others, 1991

Comment (Exploration): Status = Active?

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References

Reference (Deposit): Newberry, R.J., Crafford, T.C., Newkirk, S.R., Young, L.E., Nelson, S.W., and Duke, N.A., 1997, Volcanogenic massive sulfide deposits of Alaska, in Goldfarb, R.J. and Miller, L. D., eds., Mineral deposits of Alaska: Economic Geology Monograph 9, p. 120-150.

Reference (Deposit): Rubicon Minerals, 1998, Palmer VMS Project, southeast Alaska, Executive Summary: unpublished report by Rubicon Minerals Corporation, Vancouver, British Columbia, 25 p.

Reference (Deposit): Rutledge, F.A., 1950, Investigation of mercury deposits, Cinnabar Creek area, Georgetown and Akiak districts, Kuskokwim region, southwestern Alaska: U.S. Bureau of Mines Report of Investigations 4719, 9 p.

Reference (Deposit): Still, J.C., 1991, Bureau of Mines mineral investigations in the Juneau mining district, Alaska, 1984 - 1988, v. 2, Detailed mine, prospect, and mineral occurrence descriptions, section A, Haines-Klukwan-Porcupine subarea: U.S. Bureau of Mines of Mines Special Publication, 214 p.

Reference (Deposit): Still, J.C., Weir, K.R., Gilbert, W.G., and Redman, E.C., 1984, Stream-sediment, float, and bedrock sampling in the Porcupine mining area, southeast Alaska: U.S. Bureau of Mines Open-File Report 173-84, 19 p.

Reference (Deposit): Still, J.C., Gilbert, W.G., and Forbes, R.B., 1987, Final report of stream sediment, float, and bedrock sampling in the Porcupine mining area, southeast Alaska, 1983-1985: U.S. Bureau of Mines Open-File Report 36-87, 35 p., 8 sheets.

Reference (Deposit): Redman, E.C., 1983, Reconnaissance geology of the Glacier Creek area, Skagway B-4 quadrangle, Alaska, in Appendix B of Still, J.C., 1984, Stratiform massive sulfide deposits in the Mt. Henry Clay area, southeast Alaska: U.S. Bureau of Mines Open-File Report 118-84, 65 p.

Reference (Deposit): Gilbert, W.G., and Redman, E.C., 1989, Lode deposits, prospects, and occurrences of the Porcupine mining area, southeast Alaska: U.S. Bureau of Mines Open-File Report 17-89, 1 sheet, scale 1:39,600.

Reference (Deposit): Still, J.C., Hoekzema, R.B., Bundtzen, T.K., Gilbert, W.G., Wier, K.R., Burns, L.E., and Fechner, S.A., 1991, Economic geology of Haines-Klukwan-Porcupine area, southeastern Alaska: Alaska Division of Geological and Geophysical Surveys Report of Investigations 91-4, 156 p., 5 sheets, scale 1:63,360.

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