Unnamed (southeast of upper Finger Glacier)

The Unnamed (southeast of upper Finger Glacier) is a iron and titanium mine located in Alaska.

About the MRDS Data:

All mine locations were obtained from the USGS Mineral Resources Data System. The locations and other information in this database have not been verified for accuracy. It should be assumed that all mines are on private property.

Mine Info

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Site Name

Primary: Unnamed (southeast of upper Finger Glacier)

Commodity

Primary: Iron
Primary: Titanium
Secondary: Lead
Secondary: Copper
Secondary: Tin

Location

State: Alaska
District: Yakutat

Land Status

Not available

Holdings

Not available

Workings

Not available

Ownership

Not available

Production

Not available

Deposit

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

Physiography

Not available

Mineral Deposit Model

Model Name: Bushveld Fe-Ti-V

Orebody

Not available

Structure

Not available

Alterations

Not available

Rocks

Not available

Analytical Data

Not available

Materials

Ore: Ilmenite
Ore: Magnetite

Comments

Comment (Geology): Geologic Description = The ilmenite-magnetite occurrence at Rossman's (1963, B 1121-F) location number 44 is within and about 1.4 miles from the southwest contact of the Crillon-LaPerouse layered mafic-ultramafic intrusion (Brew and others, 1978). Layering in the stock near this locality strikes northwest and dips moderately steeply to the northeast. ? At the locality, ilmenite and magnetite are concentrated in cumulus layers. Analysis of a heavy-mineral concentrate (Rossman, 1963, table 7) by semiquantitative spectrographic methods found X0.0+ percent iron and X.0 percent titanium. Heavy-mineral concentrates also contained 0.X percent each of copper, lead, and tin and 0.0X percent of cobalt and nickel. The concentrations of the trace metals are sufficiently low that they do not prove separate mineral phases for any of the trace metals.

Comment (Deposit): Model Name = Possibly Bushveld Fe-Ti-V (Cox and Singer, 1986; model 3). Ilmenite and magnetite enriched in cumulus layers of a synorogenic (Foley and others, 1997) layered mafic-ultramafic stock.

Comment (Commodity): Ore Material = unknown sulfide phases

Comment (Deposit): Other Comments = Chugach terrane. The site is in Glacier Bay National Park and Preserve.

Comment (Commodity): Ore Material = unknown sulfide phases

Comment (Geology): Age = Tertiary.

Comment (Reference): Primary Reference = Rossman, 1963 (B 1121-F)

Comment (Workings): Workings / Exploration = Surface outcrops only; no development.

Comment (Exploration): Status = Inactive

Comment (Reserve-Resource): Reserves = No reserves projected. Thickness and horizontal continuity information lacking.

References

Reference (Deposit): Rossman, Darwin, 1963, Geology and petrology of two stocks of layered gabbro in the Fairweather Range, Alaska: U.S. Geological Survey Bulletin 1121-F, p. F1-F50.

Reference (Deposit): Brew, D.A., Johnson, B.R., Grybeck, D., Griscom, A., Barnes, D.F., Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources of the Glacier Bay National Monument Wilderness Study Area, Alaska: U.S. Geological Survey Open-File Report 78-494, 670 p.

Reference (Deposit): Kimball, A.L., Still, J.C., and Rataj, J.L., 1978, Mineral resources, in Brew, D. A., and others, Mineral resources of the Glacier Bay National Monument wilderness study area, Alaska: U.S. Geological Survey Open-File Report 78-494, p. C1-C375.

Reference (Deposit): Cox, D.P., and Singer, D.A., 1986, Mineral deposit models: U.S. Geological Survey Bulletin 1693, 379 p.

Reference (Deposit): Foley, J.Y., Light, T.D., Nelson, S.W., and Harris, R.A., 1997, Mineral occurrences associated with mafic-ultramafic and related alkaline complexes in Alaska: Economic Geology, Monograph 9, p. 396-449.

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