Monarch

Prospect, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals chalcopyrite; covellite; pyrite; pyrrhotite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale SR
Quadrangle map, 1:63,360-scale B-3
Latitude 60.3564
Longitude -147.7678
Nearby scientific data Find additional scientific data near this location
Location and accuracy The prospect is located on the southeast side of hill 1456 at an elevation of about 680 feet. It is about 0.1 mile southeast of SR238. It is in the NE1/4 section 18, T. 3 N., R. 10 E., of the Seward Meridian. This is location 16 of Condon and Cass (1958), location 95 of Cobb and Richter (1972), location 132 of MacKevett and Holloway (1977), location 217 of Cobb and Tysdal (1980), and location S-62 of Jansons and others (1984). This location is accurate to within a quarter of a mile.

Geologic setting

Geologic description

The prospect consists of a shear zone that trends N 10 to 15 E. The zone contains epidote stringers and as much as 5 percent disseminated pyrite with minor amounts of covellite and chalcopyrite (Kurtak and Jeske, 1986). The host rock is greenstone of the Orca Group of early Tertiary age (Nelson and others, 1985). Grant and Higgins (1909) reported an adit (now caved) with 350 feet of workings; it appeared to follow the shear zone. Samples collected from the shear zone exposed above the caved adit contained 360 ppm copper and 195 ppm zinc (Kurtak and Jeske, 1986).
Geologic map unit (-147.769851389755, 60.3558372818764)
Mineral deposit model Cyprus massive sulfide (Cox and Singer, 1986; model 24a)
Mineral deposit model number 24a
Age of mineralization Tertiary or younger; the mineralization is in rocks of the Orca Group of Tertiary age.

Production and reserves

Workings or exploration Grant and Higgins (1909) reported one adit with 350 feet of workings; it appeared to follow the shear zone. Samples collected from the shear zone exposed above the caved adit contained 360 ppm copper and 195 ppm zinc (Kurtak and Jeske, 1986).
Indication of production None

References

References

Reporters Jeff A. Huber and Carol S. Huber (Anchorage)
Last report date 1/2/2002