Jupiter

Prospect, Active

Commodities and mineralogy

Main commodities Au; Cu
Ore minerals chalcopyrite; gold; pyrite; pyrrhotite
Gangue minerals albite; chlorite; epidote; garnet

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-6
Latitude 63.233
Longitude -146.6921
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Jupiter prospect is located on a northwest-aligned ridge about 2.0 miles east of the West Fork Maclaren River within the Stellar Project; 0.5 mile southeast of the center of section 25, T. 19 S., R. 5 E., of the Fairbanks Meridian. This location is accurate to within about 100 feet.

Geologic setting

Geologic description

The Jupiter prospect is hosted in altered Triassic volcanic rocks near a contact with dioritic intrusive rocks. The prospect, located approximately 1.8 kilometers (1.1 miles) north of the main Zackly skarn, is characterized by east- and northerly-trending,altered,copper/gold-bearing fracture/vein zones and disseminated chalcopyrite and gold hosted in andesites and basalts (P. St. George, Chief Exploration Officer, Millrock Resources Inc., oral communication, 2014; Millrock Resources Inc., 2014). Soil sampling has defined a 420 parts per million (ppm) copper anomaly measuring approximately 800 meters by 1.9 kilometers. Anomalous gold-in-soil values are commonly associated with elevated copper values with assays up to 0.330 ppm gold returned (Millrock Resources Inc., 2014).
Between 2011 and 2013 field seasons, Millrock conducted rock, soil, stream sediments sampling, and an airborne geophysical and spectrometry survey (P. St. George, Chief Exploration Officer, Millrock Resources Inc., oral communication, 2014).
Geologic map unit (, )
Mineral deposit model Porphyry Cu? (Cox and Singer, 1986; model 17)
Mineral deposit model number 17?
Age of mineralization Triassic or younger based on age of host rock.
Alteration of deposit Disseminated chalcopyrite and gold with albite, chlorite, epidote, and garnet alteration minerals (P. St. George, Chief Exploration Officer, Millrock Resources Inc., oral communication, 2014).

Production and reserves

Workings or exploration Between 2011 and 2013 field seasons, Millrock conducted rock, soil, stream sediments sampling, and an airborne geophysical and spectrometry survey (P. St. George, Chief Exploration Officer, Millrock Resources Inc., oral communication, 2014).
Indication of production None
Reserve estimates None.
Production notes None.

References