Unnamed (north of upper Jay Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu
Ore minerals malachite
Gangue minerals epidote; fluorite; quartz

Geographic location

Quadrangle map, 1:250,000-scale TK
Quadrangle map, 1:63,360-scale D-2
Latitude 62.847
Longitude -147.7066
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is at an elevation of about 3,800 feet, about 3.5 miles west-northwest of the low pass between Jay Creek and Coal Creek It is near the center of sec. 23, T. 32 N., R. 9 E., Seward Meridian. The location is accurate. This is locality B34 of Kurtak and others (1992).

Geologic setting

Geologic description

The rocks in the vicinity of this occurrence are chlorite schist, greenstone, and foliated granite (Kurtak and others, 1992). The greenstone is silicified and iron-stained; the chlorite schist is iron-stained. The occurrence consists of quartz float that contains malachite, fluorite, and epidote (Kurtak and others, 1992). A sample of malachite-bearing quartz contains 161 parts per million copper.
Geologic map unit (-147.708834290918, 62.8465421416022)
Mineral deposit model Porphyry Cu-Au? or Basaltic Cu? (Cox and Singer, 1986; model 20c? or 23?)
Mineral deposit model number 20c? or 23?
Alteration of deposit Oxidation of copper mineral. The greenstone is silicified and iron-stained; the chlorite schist is iron-stained.

Production and reserves

Workings or exploration Only limited surface sampling by U.S. Bureau of Mines (Kurtak and others, 1992).
Indication of production None

Additional comments

MAS/MILS number 20760094.

References