Willow Mountain

Occurrence, Undetermined

Commodities and mineralogy

Main commodities Cu; Zn
Ore minerals chalcopyrite; hydrozincite; malachite; pyrite

Geographic location

Quadrangle map, 1:250,000-scale VA
Quadrangle map, 1:63,360-scale D-4
Latitude 61.7745
Longitude -145.192
Nearby scientific data Find additional scientific data near this location
Location and accuracy This prospect is located on the east flank of Willow Mountain, about one-half mile west of the Richardson Highway; it is at an elevation of about 3,000 feet in the northeast corner of section 22, T. 1 S., R. 1 E., of the Copper River Meridian. This prospect is approximately located, perhaps within one-quarter mile. It is locality 53 of Cobb and Matson (1972) and locality 44 of Winkler and others (1981 [OFR 80-892-B]).

Geologic setting

Geologic description

Hydrozincite and smaller amounts of chalcopyrite and malachite are sparsely but widely disrtibuted in limestone of the Jurassic Talkeetna Formation (Berg and Cobb, 1967, p. 52; Winkler and others, 1981 [OFR 80-892-B]; Winkler and others, 1981 [OFR 80-892-A]).
Geologic map unit (-145.19412307537, 61.7740172627102)
Mineral deposit model Disseminations or replacements in limestone
Age of mineralization Jurassic or younger; the host rocks have been assigned to the Jurassic Talkeetna Formation (Winkler and others, 1981 [OFR 80-892-A].
Alteration of deposit Oxidation; hydrozincite is a secondary, hydrous carbonate of zinc.

Production and reserves

Workings or exploration Only reconnaissance work has been carried out.
Indication of production None