Wortmanns Glacier

Occurrence, Probably inactive

Commodities and mineralogy

Main commodities Cu
Other commodities Ag; Pb; Zn
Ore minerals chalcopyrite; galena; pyrite; sphalerite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale VA
Quadrangle map, 1:63,360-scale A-5
Latitude 61.0154
Longitude -145.7481
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 1,600 feet along the west side of lower Wortmanns Glacier; it is in the SW1/4 section 10, T. 10 S., R. 3 W., of the Copper River Meridian. This occurrence is probably located to within one-quarter mile. It is locality 78 of Winkler and others (1981 [OFR 80-892-B]).

Geologic setting

Geologic description

Iron-stained lenses and quartz veins in mafic metavolcanic rocks of the Late Cretaceous Valdez Group contain pyrite, chalcopyrite, galena, and sphalerite at this occurrence (Winkler and others, 1981 [OFR 80-892-B]). The sulfide minerals are disseminated in the mafic metavolcanic rocks and in the quartz veins. The metavolcanic rocks probably represent ocean floor basalts that were accreted with the flysch of the Valdez Group (Winkler and others, 1981 [OFR 80-892-A]).
Geologic map unit (-145.750098984413, 61.0148816142245)
Mineral deposit model Cyprus massive sulfide (Cox and Singer, 1986; model 24a)
Mineral deposit model number 24a
Age of mineralization Late Cretaceous; the host metavolcanic rocks probably represent ocean floor basalts that were accreted with the flysch of the Valdez Group (Winkler and others, 1981 [OFR 80-892-A]).
Alteration of deposit Oxidation; mineralized zones are iron-stained.

Production and reserves

Workings or exploration Only reconnaissance surface examinations.
Indication of production None

References