Long Bay No. 1

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; As; Pb; Zn
Ore minerals arsenopyrite; galena; lead; pyrite; sphalerite

Geographic location

Quadrangle map, 1:250,000-scale AN
Quadrangle map, 1:63,360-scale A-1
Latitude 61.04
Longitude -147.28
Nearby scientific data Find additional scientific data near this location
Location and accuracy Located 2.4 miles north of the western arm of Long Bay, near headwaters of unnamed southward flowing tributary. Accurate within 2,000 ft. Locality A-4 of Jansons and others (1984).

Geologic setting

Geologic description

Greenstone, slate, and graywacke of the Tertiary Orca Group are cut by mineralized shear zones. Zones range from 4 inches to 20 ft wide and contain sphalerite, galena, pyrite, and arsenopyrite (Jansons and others, 1984).
Jansons and others (1984) reported six chip samples contained from 39 ppm to 1.75 percent Zn, less than 1 ppm to 0.14 percent Pb, 0.3 to 8.2 ppm Ag, and less than 10 ppm to 1.6 percent As. Grab samples contained from 36 ppm to 3.2 percent Zn, 5 ppm to 2.6 percent Pb, and less than 0.1 ppm to 8 oz/ton Ag.
Geologic map unit (-147.282071674548, 61.039452588064)
Age of mineralization Paleocene or younger; mineralized shear zones cut greenstone, slate, and graywacke of the Tertiary Orca Group.

Production and reserves

Workings or exploration Jansons and others (1984) reported six chip samples contain from 39 ppm to 1.75 percent Zn, less than 1 ppm to 0.14 percent Pb, 0.3 to 8.2 ppm Ag, and less than 10 ppm to 1.6 percent As. Grab samples contain from 36 ppm to 3.2 percent Zn, 5 ppm to 2.6 percent Pb, and less than 0.1 ppm to 8 oz/ton Ag. The potential for mineral development is moderate, although no development has occurred to date (Jansons and others, 1984).
Indication of production None

References

MRDS Number A106209
Reporters D.P. Bickerstaff (USGS contractor); S.W. Huss (USGS)
Last report date 7/30/1998