Unnamed (at head of Castle Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Zn
Other commodities Cu; Sb
Gangue minerals iron-oxides

Geographic location

Quadrangle map, 1:250,000-scale SO
Quadrangle map, 1:63,360-scale D-5
Latitude 64.877
Longitude -164.103
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the divide between Castle Creek, an east tributary to Big Four Creek, and an unnamed south tributary to No Mans Creek, at an elevation of 1,125 feet. This is locality 94 of Gamble (1988).

Geologic setting

Geologic description

A sample of gossan localized along a fault in marble contained 720 ppm Zn, 600 ppm As, 130 ppm Sb, 130 ppm Cu, and 100 ppm Mo (Gamble, 1988). Bedrock in this area is Paleozoic marble and a pelitic schist assemblage of possible Cambrian or Precambrian age (Till and others, 1986).
Geologic map unit (-164.105617969529, 64.8762629210234)
Mineral deposit model Fault-controlled gossan in marble.
Age of mineralization Cretaceous or younger? Appears to postdate regional mid-Cretaceous metamorphism.
Alteration of deposit Oxidation; gossan development.

Production and reserves

Workings or exploration Exploration activities are not reported for this occurrence.
Indication of production None