Oxide North

Prospect, Active

Commodities and mineralogy

Main commodities Au
Other commodities As
Ore minerals gold
Gangue minerals arsenopyrite; tourmaline

Geographic location

Quadrangle map, 1:250,000-scale TL
Quadrangle map, 1:63,360-scale A-6
Latitude 62.0266
Longitude -152.8983
Nearby scientific data Find additional scientific data near this location
Location and accuracy The prospect is located about 3.8 miles north-northeast of Portage Pass, and about 0.32 miles west-northwest of the center of section 2, T. 23 N., R. 20 W., of the Seward Meridian. This location is accurate to within 1/2 mile.

Geologic setting

Geologic description

This site is a mineralized zone within Oxide, the northernmost prospect at Estelle (TY019), and is about 2.5 km north of the original Oxide Ridge showing (TL077). Oxide North lies within a plutonic complex intruding a Jurassic to Early Cretaceous flysch sequence. This zone is characterized by disseminated arsenopyrite and tourmaline returned anomalous values in talus fines sampling. Soil geochemical surveys in the valley have returned widespread arsenic anomalies with gold (Millrock Resource, Inc., 2014).
Geologic map unit (, )
Mineral deposit model Porphyry Cu-Au? or intrusion-related gold? (Cox and Singer, 1986; model 20c)
Mineral deposit model number 20c?
Age of mineralization Late Cretaceous of younger based on the age of the host rock.
Alteration of deposit Not indicated.

Production and reserves

Workings or exploration
Gold mineralization was initially discovered in 2008 when multiple vein zones containing arsenopyrite, pyrite and chalcopyrite were noted along nearby Oxide Ridge, a north-south trending ridge located in the southern part of the prospect. Extensive geologic mapping helped define the target.
In summer, 2012, Millrock Resources, Inc., executed a chip sampling of mineralized outcrops, in addition to an induced polarization geophysical survey to test for disseminated sulfides. Soil geochemical surveys in the valley have returned widespread arsenic anomalies with gold (Millrock Resource, Inc., 2014).
Indication of production None
Reserve estimates None.
Production notes None.

References

References

http://www.millrockresources com/news/millrock_samples_9.1_grams_per_tonne_gold_over_27.4_meters_at_estelle_/?phpMyAdmin=M5%252C2KfdT1QNf0rgfF8WupuwwKLe (as of April 3, 2014).
http://www.millrockresources.com/projects/estelle/ (as of April 3, 2014).
Millrock Resources Inc., 2014, Estelle Gold Project overview:
Millrock Resources Inc., 2014, Millrock Samples 9.1 Grams Per Tonne Gold Over 27.4 Meters At Estelle Project, Alaska:
Reporters V.C. Zinno (Alaska Earth Sciences)
Last report date 4/3/2014