Peak

Prospect, Active

Commodities and mineralogy

Main commodities Ba; Cu; Pb; Zn
Ore minerals barite; galena; smithsonite; sphalerite
Gangue minerals carbonates; quartz

Geographic location

Quadrangle map, 1:250,000-scale BM
Quadrangle map, 1:63,360-scale C-4
Latitude 67.5638
Longitude -160.7914
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Peak prospect is at the head of an unnamed northwest tributary to the Omar River. The mineralization forms a belt that extends from the lower half of section 18 to the northwest portion of section 13, T. 24 N., R. 9 W. of the Kateel River Meridian. The coordinates are at about the center of the belt. The location is accurate.

Geologic setting

Geologic description

In 2006, NovaGold Resources began working in the region and staked a large block of claims that covered this and other similar prospects nearby (TintinaGold Resources Inc., 2010). In 2007, NovaGold carried out extensive field work in the area, emphasizing geologic mapping and geochemical sampling, in the course of which they discovered this previously unrecognized mineralization.
The rocks in the area consist of folded and faulted, Paleozoic limestone and dolomite of the Paleozoic Baird Group. In 2009, TintinaGold worked extensively on the Peak prospect. They identified scattered narrow trains of mineralization that include gossan, silica veins, and barite-rich rock that extends for more than 1.5 kilometers. The mineralization consists of smithsonite encrustations, coarsely crystalline sphalerite and galena, and massive barite. A two-meter-wide sample of a silica-barite vein in carbonates contained 5.3 percent zinc. Samples of gossan contained up to 1 percent zinc, 0.5 percent lead, and 500 parts per million (ppm) copper. Selected samples contained up to 33.1 percent zinc and 4.1 percent lead. Most of the mineralization is strongly oxidized at the surface.
Geologic map unit (-160.794278340333, 67.563180937332)
Mineral deposit model Zinc-lead mineralization in Paleozoic carbonates. Insufficient data to determine whether epigenetic or (remobilized?) syngenetic.
Age of mineralization Paleozoic or younger based on the age of the host rocks.
Alteration of deposit Silicification; sulfides are largely oxidized to gossan.

Production and reserves

Workings or exploration In 2006, NovaGold began working in the region and staked a large block of claims that covered this and other similar prospects nearby (TintinaGold Resources Inc., 2010). In 2007, NovaGold carried out extensive work in the area. The previously unknown mineralization at the Peak prospect was identified by additional surface mapping, sampling, and soil geochemistry.
Indication of production None

References

Reporters D.J. Grybeck (Contractor, U.S. Geological Survey)
Last report date 4/2/2010