Andrew Lake

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au; Cu; Zn

Geographic location

Quadrangle map, 1:250,000-scale AD
Quadrangle map, 1:63,360-scale C-2
Latitude 51.9308
Longitude -176.6239
Nearby scientific data Find additional scientific data near this location
Location and accuracy On shore of Andrew Lake, approximately 2 km northeast of its southernmost point. Possibly additional mineralization extents along a N 20 E extending linear to the east.

Geologic setting

Geologic description

Fine-grained lithic sandstone of the Andrew Lake Formation overlies volcanic breccia and massive flows (?). A linear, possibly a fault, extends northeast (about N 20 E) from the locality. Other samples of volcanic rocks collected in the vicinity of this linear were also weakly anomalous in Zn and Au.
Geologic map unit (-176.626383081398, 51.9294208446332)
Age of mineralization Tertiary?
Alteration of deposit Chloritization.

Production and reserves

Workings or exploration A single sample of the sandstone collected during brief U.S. Geological Survey reconnaissance studies in 1993 yielded 120 ppm Cu, 110 ppm Zn, and 4 ppb Au. Volcanic rock samples yielded 4 ppb Au (93TL 102c) and up to 120 ppm Zn (samples 93AWs 12 and 13).
Indication of production None

References

MRDS Number A106035
Reporters F.H. Wilson, T.D. Light
Last report date 2/22/1996