Unnamed (near the mouth of Slate Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Other commodities Ag; Au
Ore minerals chalcopyrite; pyrite

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-2
Latitude 63.1704
Longitude -144.8632
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is near the mouth of Slate Creek, near the center of the W1/2NW1/4 section 22, T. 20 S., R. 15 E., Fairbanks Meridian. The occurrence corresponds to locality 24 of Rose (1967), locality 17 on figure 6 of Cobb (1979 [OFR 79-238]), locality 48 of MacKevett and Holloway (1977), and locality 136 in table 2 of Nokleberg and others (1991). The location is accurate within 0.1 mile.

Geologic setting

Geologic description

Rocks in the vicinity of the occurrence consist mainly of andesite and dacite of Pennsylvanian age northwest of a dike-like body of quartz monzonite of Mesozoic age (Rose, 1967). The volcanic rocks are highly pyritized and contain weakly disseminated chalcopyrite (MacKevett and Holloway, 1977). A sample of pyritized volcanic rocks contained a trace of gold, 0.12 ounce of silver per ton, and 0.15 percent copper (Rose, 1967).
Geologic map unit (-144.865427040287, 63.1700026623526)
Mineral deposit model Porphyry Cu (Cox and Singer, 1986; model 20c).
Mineral deposit model number 20c
Age of mineralization The mineralization is either syngenetic and related to the Pennsylvanian volcanic rocks or epigenetic, related to the Mesozoic quartz monzonite body.
Alteration of deposit Pyritization of volcanic rocks.

Production and reserves

Indication of production None