Peak 5309 No. 3

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag
Other commodities Cu; Pb; Zn
Gangue minerals calcite; hematite; quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale B-7
Latitude 60.3448
Longitude -149.6004
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is located on the west-northwest flank of peak 5309 north of the lower ice field at an elevation of approximately 4,100 feet. It is in the SE1/4 section 15, T. 3 N., R. 2 W., of the Seward Meridian. This is location S-218 of Jansons and others (1984). This location is accurate to within 1,000 feet.

Geologic setting

Geologic description

The occurrence consists of several parallel, vuggy, hematite-stained quartz-calcite veins containing small euhedral quartz crystals and numerous rock fragments. The veins are generally parallel to well-bedded siltstone that strikes N55E and dip 55SE. Nelson and others (1985) have mapped this area as undivided sedimentary rock of the Valdez Group of Late Cretaceous age. A single sample of three veins contained no detectable gold, 0.1 ppm silver, 27 ppm copper, 11 ppm lead, and 44 ppm zinc (Hoekzema and Sherman, 1983).
Geologic map unit (-149.602559097778, 60.344236149017)
Mineral deposit model Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a)
Mineral deposit model number 36a
Age of mineralization Cretaceous or younger; the veins cut rocks of the Valdez Group of Late Cretaceous age.
Alteration of deposit Veins are hematite-stained.

Production and reserves

Workings or exploration No workings or improvements are reported in the literature. A single sample of three veins contained no detectable gold, 0.1 ppm silver, 27 ppm copper, 11 ppm lead, and 44 ppm zinc (Hoekzema and Sherman, 1983).
Indication of production None

Additional comments

This occurrence was discovered by the U.S. Bureau of Mines.

References

References

Reporters Jeff A. Huber and Carol S. Huber (Anchorage)
Last report date 12/10/2001