Gemini (ARDF #MH383) Au, Cu

Gemini

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	B-6
Latitude	63.2631
Longitude	-146.7012
Nearby scientific data	Find additional scientific data near this location
Location and accuracy	The Gemini 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 south-southeast of the center of section 13, T. 19 S., R. 5 E., of the Fairbanks Meridian. This location is accurate to within about 100 feet.

Geologic setting

Geologic description The Gemini prospect, part of the Stellar Project area, appears to be hosted primarily within Triassic volcanic rocks, specifically andesites and basalts. The mineralization is characterized by disseminated chalcopyrite and gold (P. St. George, Chief Exploration Officer, Millrock Resources Inc., oral communication, 2014). This newly discovered prospect was defined in August of 2013, the result of a wide-spaced, property-wide soil sampling program. The Gemini 420 parts per million (ppm) copper-in-soil anomaly, while variable in outline, averages approximately 1.0 kilometer by 1.6 kilometers. Anomalous gold-in-soil results tend to occur coincident with elevated copper values with gold assays typically ranging from 0.150 – 0.250 ppm gold (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-Au? (Cox and Singer, 1986, model 20c)
Mineral deposit model number	20c?
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	This newly discovered prospect was defined in August of 2013, the result of a wide-spaced, property-wide soil sampling program. The Gemini 420 parts per million (ppm) copper-in-soil anomaly, while variable in outline, averages approximately 1.0 kilometer by 1.6 kilometers. Anomalous gold-in-soil results tend to occur coincident with elevated copper values with gold assays typically ranging from 0.150 – 0.250 ppm gold (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).
Indication of production	None
Reserve estimates	None.
Production notes	None.

References

References Cox, D.P., and Singer, D.A., eds., 1986, Mineral deposit models: U.S. Geological Survey Bulletin 1693, 379 p. Millrock Resources Inc., 2014, Stellar: http://www.millrockresources.com/projects/stellar/ (as of April 29, 2014). Nokleberg, W.J., Lange, I.M., Roback, R.C., Yeend, Warren, and Silva, S.R., 1991, Map showing locations of metalliferous lode and placer mineral occurrences, mineral deposits, prospects, and mines, Mount Hayes quadrangle, eastern Alaska Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1996-C, 42 p., 1 sheet, scale 1:250,000.
Reporters	V.C. Zinno (Alaska Earth Sciences, Inc.)
Last report date	4/30/2014