Unnamed (on ridge above Two Plate Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag
Other commodities Mo
Ore minerals molybdenite; pyrite

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale B-6
Latitude 63.3041
Longitude -146.5921
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 5,000 feet on the south side of the ridge between Two Plate Creek and Cathedral Creek, at the north edge of the NE1/4NE1/4 of section 4, T. 19 S., R. 6 E., Fairbanks Meridian. The site corresponds to locality 31 in table 2 of Nokleberg and others (1991). The location is probably accurate within one-half mile.

Geologic setting

Geologic description

This occurrence consists of altered diorite porphyry, probably of Pennsylvanian and (or) Permian age, that contains disseminated pyrite and possibly a trace of molybdenite; a grab sample of pyritic porphyry contained 5 parts per million (ppm) silver and 50 ppm molybdenum (locality 31, table 2, Nokleberg and others, 1991).
Geologic map unit (-146.594368051533, 63.303668921447)
Mineral deposit model Porphyry Cu (Cox and Singer, 1986; model 17).
Mineral deposit model number 17
Age of mineralization Pennsylvanian and (or) Permian.
Alteration of deposit 'Altered' diorite porphyry.

Production and reserves

Workings or exploration There are no extensive workings at the site.
Indication of production None

Additional comments

The porphyry character of the deposit is inferred from reconnaissance examination and one sample.

References