Main commodities | Au; Cu |
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Ore minerals | chalcopyrite; gold; pyrite; pyrrhotite |
Gangue minerals | albite; chlorite; epidote; garnet |
Quadrangle map, 1:250,000-scale | MH |
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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 descriptionThe 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 | (, ) |
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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). |
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). |
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Indication of production | None |
Reserve estimates | None. |
Production notes | None. |
ReferencesMillrock Resources Inc., 2014, Stellar: http://www.millrockresources.com/projects/stellar/ (as of April 29, 2014).
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Reporters | V.C. Zinno (Alaska Earth Sciences, Inc.) |
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Last report date | 4/30/2014 |