North Pole Hill

Prospects, Active

Commodities and mineralogy

Main commodities Ag; Au; Cu; Pd
Ore minerals bornite

Geographic location

Quadrangle map, 1:250,000-scale CR
Quadrangle map, 1:63,360-scale C-2
Latitude 55.6364
Longitude -132.60411
Nearby scientific data Find additional scientific data near this location
Location and accuracy There are several prospects in the large gabbro-pyroxenite pluton that forms North Pole Hill (Sainsbury, 1961). There are numerous pits and mineral occurrences scattered on the hill and this site is somewhat arbitrarily located at about the center of the hill, near the southwest corner of section 7, T. 72 S., R. 84 E., of the Copper River Meridian. The accuracy of this location is within 500 feet.

Geologic setting

Geologic description

The gabbro and pyroxenite that makes up North Pole Hill is an extension of the pluton at the Salt Chuck Mine (CR049), where it has been dated at 429 Ma (Loney and others, 1987).
In 1954 and 1955, Juan Munoz carried out geophysical and geochemical surveys on North Pole Hill and dug several prospects pits that showed bornite in the gabbro and pyroxenite (Munoz, 1955; Sainsbury, 1961). In 1969, and perhaps other years, Munoz drilled several holes on the body (D.J. Grybeck, field visit, 1969). Although not well documented, North Pole Hill has been examined and prospected repeatedly since the 1970s because of its proximity and similar geology to the Salt Chuck Mine. Santoy Resources Ltd. was active on North Pole Hill (http://www.santoy.ca/index.html; Sept. 2003). They had one showing on the north flank of the hill ('Geoff showing') with samples that contained 1.1 percent copper and 0.19 gram of palladium per ton. They also located a previously unknown small adit (at an unspecified location on the hill); grab samples from the dump contained 2.67 percent copper, 0.63 gram of palladium per ton, 2.42 grams of gold per ton, and 14.03 grams of silver per ton.
In his 1954 and 1955 work, Munoz also located several pyritiferous quartz veins, 6 to 18 inches thick, near a prominent fault. They contained about $7.00 in gold (at $35 per ounce). Those veins are probably at the prospect (shown on Plate 33 of Sainsbury, 1961) at about the center of section 7, T. 72 S., R. 84 E., of the Copper River Meridian.
From 2010 to 2014, Pure Nickel Inc. has been exploring at North Pole Hill as part of their Salt Chuck Project. Work they have performed includes IP surveying, soil sampling, and drilling. A 2012 drilling program resulted in high grade intersections of up to 127.8 grams of gold per tonne, 57.6 grams of silver per tonne, and 2.78 percent copper over 0.35 meter apparent width. Pure Nickel's 2014 drill program is to test continuity of high grade gold-copper mineralization (Pure Nickel Inc., 2014).
Geologic map unit (-132.605773024287, 55.6360303227019)
Mineral deposit model Disseminated bornite in gabbro.
Age of mineralization The gabbro on North Pole Hill has been dated at 429 Ma (Loney and others, 1987); the bornite deposit is probably cogenetic with the intrusion of the gabbro.
Alteration of deposit Not reported.

Production and reserves

Workings or exploration
Prospect pits and at least two drill holes. Although not well documented, North Pole Hill has been examined and prospected repeatedly since the 1970s because of its proximity and similar geology to the Salt Chuck Mine. Santoy Resources Ltd. was active on North Pole Hill (http://www.santoy.ca/index.html; Sept. 2003). They had one showing on the north flank of the hill ('Geoff showing') with samples that contained 1.1 percent copper and 0.19 gram of palladium per ton. They also located a previously unknown small adit (at an unspecified location on the hill); grab samples from the dump contained 2.67 percent copper, 0.63 gram of palladium per ton, 2.42 grams of gold per ton, and 14.03 grams of silver per ton.
In his 1954 and 1955 work, Munoz also located several pyritiferous quartz veins, 6 to 18 inches thick, near a prominent fault. They contained about $7.00 in gold (at $35 per ounce). Those veins are probably at the prospect (shown on Plate 33 of Sainsbury, 1961) at about the center of section 7, T. 72 S., R. 84 E., of the Copper River Meridian.
From 2010 to 2014, Pure Nickel Inc. has been exploring at North Pole Hill as part of their Salt Chuck Project. Work they have performed includes IP surveying, soil sampling, and drilling. A 2012 drilling program resulted in high grade intersections of up to 127.8 grams of gold per tonne, 57.6 grams of silver per tonne, and 2.78 percent copper over 0.35 meter apparent width. Pure Nickel's 2014 drill program is to test continuity of high grade gold-copper mineralization (Pure Nickel Inc., 2014).
Indication of production None
Reserve estimates None.
Production notes None.

References

MRDS Number A010068

References

Munoz, Juan, 1955, North Pole Hill prospect, Prince of Wales Island, Alaska: Report for Coast Range Exploration Company, 6 p. (Unpublished report held by the Bureau of Land Management, Mineral Information Center, Juneau, Alaska).
Pure Nickel Inc., 2014, Pure Nickel Inc., 2014, Salt Chuck Project overview: http://www.purenickel.com/s/Salt_Chuck_Project.asp (as of July 11, 2014).
Reporters D.J. Grybeck (Applied Geology); V.C. Zinno (Alaska Earth Sciences, Inc.)
Last report date 12/10/2014