Unnamed (in Horn Mountains southwest of Cameron Pass)

Prospect, Inactive

Commodities and mineralogy

Main commodities Zeolites
Ore minerals analcime; heulandite; laumontite; mordenite
Gangue minerals calcite; feldspar; montmorillonite; quartz

Geographic location

Quadrangle map, 1:250,000-scale TK
Quadrangle map, 1:63,360-scale A-1
Latitude 62.0242
Longitude -147.3542
Nearby scientific data Find additional scientific data near this location
Location and accuracy This site is a 7-mile-long belt that extends southwest from the head of North Creek, into the Anchorage quadrangle. The coordinates are at about the center of this belt which is near the center of sec. 1, T. 22 N., R. 11 E., Seward Meridian. The location is accurate. This is locality 112 of Csejtey and Miller (1978).

Geologic setting

Geologic description

This deposit is a 7-mile-long belt that consists of zeolite minerals in the Lower Jurassic, Talkeetna Formation (Csejtey and others, 1978). The deposit consists of flat-lying, normally graded, zeolitized tuff beds interlayered with lava flows. The zeolite minerals are analcime, heulandite, laumontite, and mordenite; they are accompanied by calcite, feldspar, montmorillonite, and quartz. The mordenite content ranges from 26 to 72 percent, and averages 49 percent (Hawkins, 1976). According to Hawkins, this deposit is of economic size and grade and warrants development.
Geologic map unit (-147.356400994842, 62.0236906804909)
Age of mineralization Jurassic.
Alteration of deposit Zeolitization of tuff beds.

Production and reserves

Workings or exploration Only surface examination.
Indication of production None

References

MRDS Number A012197

References

Reporters R.K. Rogers (U. S. Geological Survey contractor)
Last report date 10/2/2002