Unnamed (near Granite Creek)

Occurrence, Probably inactive

Commodities and mineralogy

Main commodities Ag; Au; Pb; Zn
Ore minerals chalcopyrite; galena; sphalerite
Gangue minerals fluorite; quartz

Geographic location

Quadrangle map, 1:250,000-scale BN
Quadrangle map, 1:63,360-scale A-2
Latitude 65.23
Longitude -162.53
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the northwest flank of Death Valley. It is on a small ridge (elevation 1,284 feet) between the east and west forks of a north tributary to Granite Creek. Granite Creek is the principal drainage in northwest Death Valley. This is locality 46 of Gamble (1988).

Geologic setting

Geologic description

Quartz-aplite breccia fillings and quartz-fluorite veins cut black slate hornfels (Miller and Grybeck, 1973). These contain up to several percent galena and sphalerite and minor chalcopyrite. Analytical data for four samples were reported by Miller and Grybeck (1973, Table 2). Two samples of aplite with disseminated galena and sphalerite each contain greater than 20,000 ppm Pb and greater than 10,000 ppm Zn; they also contain 30 and 50 ppm Ag and one contains 0.1 ppm Au. The other two samples from this locality contain anomalous Pb, Zn, and Ag as well as 0.02 and 0.04 ppm Au. This occurrence is in the hanging wall of the major normal fault that marks the southern boundary of the high grade metamorphic rocks and granitic intrusives of the Bendeleben Mountains (Till and others, 1986). Mining claims existed in this area in 1975 (Hudson and others, 1977).
Geologic map unit (-162.532632748466, 65.2292992700339)
Mineral deposit model Polymetallic veins? (Cox and Singer, 1986; model 22c?).
Mineral deposit model number 22c?
Age of mineralization Cretaceous ?; Epigenetic mineralization in metamorphic rocks of Seward Peninsula is primarily of Cretaceous age.
Alteration of deposit Quartz-fluorite veining (and possibly other alteration of intrusive rocks) is present.

Production and reserves

Workings or exploration Workings have not been reported but mining claims have been staked in the area and were current as of 1975 (Hudson and others, 1977).
Indication of production None

References