Peak

Prospect, Inactive

Commodities and mineralogy

Main commodities Au
Other commodities As
Ore minerals arsenopyrite; gold
Gangue minerals quartz; sericite

Geographic location

Quadrangle map, 1:250,000-scale LG
Quadrangle map, 1:63,360-scale B-6
Latitude 65.386
Longitude -149.609
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Peak prospect is located on a peak on the western side of Sawtooth Mountain, 2.6 miles west of VANM 4494 'Tooth'. It is in the SW1/4 SW1/4 of section 33, 0.4 mile southwest from the center of section 33, T. 7 N., R. 10 W., of the Fairbanks Meridian. This location is accurate within 300 meters (J.R. Woodman, Natural Resource Manger, Doyon Limited, written commun., 2014).

Geologic setting

Geologic description

American Scotland Australia found that gold mineralization is associated with quartz veins and sericitic alteration selvages hosted in two quartz monzonite / granite dikes and adjacent sedimentary rock (ASA-Montague,1997). Country rock is the Devonian Quail unit of Weber and others (1992) consisting of phyllite, siltstone, quartzose sandstone, graywacke, and conglomerate. Unit may be correlated with Nation River Formation of the Charley River quadrangle.
In 1994, ASA-Montague performed soil sampling to test for gold mineralization (ASA-Montague, 1994). In 1996 and 1997 ASA-Montague conducted core drilling to determined the extent of mineralization (ASA-Montague, 1997).
Surface samples assays show high-grade gold concentrations exhibit a poor correlation with arsenic. Drill assay results indicate gold mineralization is hosted in quartz veins and high arsenic values are commonly found in the adjacent vein selvages and sporadically in auriferous quartz veins (ASA-Montague, 1997; J.R. Woodman, Natural Resource Manager, Doyon Limited, written communication, 2014).
Geologic map unit (, )
Mineral deposit model Low-sulfide Au-quartz veins? (Cox and Singer, 1986; model 36a).
Mineral deposit model number 36a?
Age of mineralization Gold mineralization probably associated with Cretaceous intrusive rocks (ASA-Montague, 1997). Dikes likely similar in age to mid-Cretaceous (91 Ma) Sawtooth pluton (Weber and others, 1992).
Alteration of deposit Quartz and sericite (ASA-Montague, 1997).

Production and reserves

Workings or exploration
American Scotland Australia found that gold mineralization is associated with quartz veins and sericitic alteration selvages hosted in two quartz monzonite / granite dikes and adjacent sedimentary rock (ASA-Montague,1997). Surface samples assays show high-grade gold exhibits a poor correlation with arsenic. Drill assay results indicate gold mineralization is hosted in quartz veins and high arsenic values are commonly found in the adjacent vein selvages and sporadically in auriferous quartz veins. Thirty-three soil samples were collected in a 150 X 150 meter grid covering the dikes. Seven of the soil samples yielded assays of greater than 1.0 ppm gold (ASA-Montague, 1994; and J.R. Woodman, Natural Resource Manager, Doyon Limited, written communication, 2014).
In 1996 and 1997, eight core holes totaling 1556 feet were drilled in and adjacent to the dikes. A total of 34 drill intercepts ranging from 0.7 feet - 4.7 feet thick yielded assays of greater than 1.0 ppm gold. Surface samples assays show high-grade gold concentrations exhibit a poor correlation with arsenic. Drill assay results indicate gold mineralization is hosted in quartz veins and high arsenic values are commonly found in the adjacent vein selvages and sporadically in auriferous quartz veins (ASA-Montague,1997; J.R. Woodman, Natural Resource Manager, Doyon Limited, written communication, 2014).
Indication of production None

References

References

Reporters V.C. Zinno (Alaska Earth Sciences, Inc.); F.H. Wilson (USGS)
Last report date 3/15/2016