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


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