Unnamed (in tributary to Memorial Creek)

Occurrence, Probably inactive

Commodities and mineralogy

Main commodities Ba; Pb; Zn
Other commodities Sr
Ore minerals sphalerite

Geographic location

Quadrangle map, 1:250,000-scale HW
Quadrangle map, 1:63,360-scale B-3
Latitude 68.345
Longitude -157.4439
Nearby scientific data Find additional scientific data near this location
Location and accuracy This unnamed occurrence is in one of the small tributaries at the head of Memorial Creek, about a mile south of peak 1305 (in meters). It is about 0.5 mile east of the center of section 15, T. 34 N., R. 6 E.

Geologic setting

Geologic description

The rocks in the area are interbedded sandstone, siltstone, and shale of the Upper Devonian or Lower Mississippian, Kanayut Conglomerate (Kurtak and others, 1995). In following up a geochemical anomaly, samples were collected from rubblecrop of red-brown siltstone; they contained 9,423 parts per million (ppm) zinc, 1,122 ppm barium, and more than 2,000 ppm strontium. No sulfides were identified but the high zinc content indicates fine-grained sphalerite. Not enough work was done to determine the extent of the mineralization.
Geologic map unit (-157.446839599314, 68.3444779223656)
Mineral deposit model Zinc sandstone deposit?
Age of mineralization Possibly Devonian or Mississippian based on the age of the host rock and by analogy to other zinc deposits in the western Brooks Range.
Alteration of deposit Not noted.

Production and reserves

Workings or exploration Only sampling and mapping by the U.S. Bureau of Mines is documented.
Indication of production None
Reserve estimates None.
Production notes None.

Additional comments

MAS number 0020200016.

References