Monitis Creek

Occurrence, Inactive

Commodities and mineralogy

Main commodities P
Other commodities U; V
Ore minerals fluorapatite
Gangue minerals fluorite

Geographic location

Quadrangle map, 1:250,000-scale CL
Latitude 68.38
Longitude -152.88
Nearby scientific data Find additional scientific data near this location
Location and accuracy Located along both sides of Monitis Creek, 600 m above junction with Kiruktagiak River. Known to within one mile.

Geologic setting

Geologic description

The phosphate occurrences are confined to the black chert and shale member of the Alapah Limestone. Interbedded phosphorite and phosphate rock occur in sections up to 11.3 m thick. The phosphate-bearing mineral consists of fluorapatite, which is concentrated in oolites, pellets, and matrix. Purple fluorite occurs locally. The phosphatic rocks can be traced for 1.5 km along strike.
Geologic map unit (-152.882856073889, 68.3795639805041)
Mineral deposit model Bedded phosphorite (Cox and Singer, 1986; model 23c).
Mineral deposit model number 34c
Age of mineralization Mississippian.

Production and reserves

Workings or exploration Individual phosphorites up to 0.6 m thick contain up to 330 percent P2O5. One 6.7 m-thick section averaged 23 percent P2O5. Samples also contained up to 2,000 ppm V, and 119 ppm U.
Indication of production None