Unnamed (Billings Glacier)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Quartz
Ore minerals quartz
Gangue minerals cleavelandite; muscovite; unknown clay minerals

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale D-5
Latitude 60.8467
Longitude -148.6016
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of 400 feet on the west side of the terminus of the Billings Glacier. It is located in NE1/4 section 29, T. 9 N., R. 5 E., of the Seward Meridian. This is location S-170 of Jansons and others (1984). This location is accurate to within a quarter of a mile.

Geologic setting

Geologic description

This occurrence consists of a 12-foot-wide pegmatite body in Eocene biotite-quartz monzonite (Hoekzema and Sherman, 1981). The pegmatite contains clay-filled vugs lined with euhedral, doubly terminated quartz crystals as much as 18 inches long. The quartz crystals are translucent and commonly coated with muscovite. The clay surrounding the quartz crystals was sampled and analyzed. It contained 1,000 ppm titanium, 10,000 ppm sodium, 20 ppm gallium, and 100 ppm vanadium (Hoekzema and Sherman, 1983).
Geologic map unit (-148.603717706304, 60.8461127572854)
Mineral deposit model Pegmatite
Age of mineralization Eocene of younger; the pegmatite cuts Eocene intrusive rock.

Production and reserves

Workings or exploration A small, hand-dug prospect pit has been excavated for the purpose of removing quartz crystals. The clay surrounding the quartz crystals was analyzed and contained 1,000 ppm titanium, 10,000 ppm sodium, 20 ppm gallium, and 100 ppm vanadium (Hoekzema and Sherman, 1983).
Indication of production Undetermined
Production notes Some 300 pounds of specimen-grade quartz has been collected (Hoekzema and Sherman, 1983).

Additional comments

The U.S. Bureau of Mines determined that this occurrence has a high mineral potential for specimen-grade quartz crystals.

References

References

Reporters Jeff A. Huber (Anchorage)
Last report date 10/15/2000