Ruby Creek

Occurrence, Inactive

Commodities and mineralogy

Main commodities Th
Other commodities REE
Ore minerals allanite; monazite

Geographic location

Quadrangle map, 1:250,000-scale EA
Quadrangle map, 1:63,360-scale C-4
Latitude 64.632
Longitude -142.7556
Nearby scientific data Find additional scientific data near this location
Location and accuracy Ruby Creek is a 10-mile-long wesy tributary of Slate Creek. The occurrence is located near the mouth of Ruby Creek, in section 29, T. 3 S., R. 25 E., of the Fairbanks Meridian. The location is accurate within one-half mile. Ruby Creek is locality 41 of Cobb (1972 [MF-393]).

Geologic setting

Geologic description

The rocks in the vicinity of Ruby Creek are granitic rocks of probable Mesozoic age, Tertiary felsic igneous rocks, and Paleozoic schist, greenschist, quartzite, and marble (Foster, 1976). Biotite from the Ruby Creek granite gives a 40Ar/39Ar plateau age of 102.1 +/- 0.4 Ma (Newberry and others, 1996). Monazite and allanite were found in heavy-mineral concentrates at the mouth of Ruby Creek in 1949 during a reconnaissance for radioactive deposits (Wedow and others, 1954). The source of the monazite and allanite is presumably granitic rocks in the drainage.
Geologic map unit (-142.757914095466, 64.631656946015)

Production and reserves

Workings or exploration Monazite and allanite were found in heavy mineral concentrates at the mouth of Ruby Creek in 1949 during a reconnaissance for radioactive deposits (Wedow and others, 1954).
Indication of production None

References