Unnamed (east of Little Waldren Fork)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Hg; Sb
Other commodities As
Ore minerals iron oxide
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale ID
Quadrangle map, 1:63,360-scale B-2
Latitude 62.46765
Longitude -156.74413
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on an northwest-trending ridge about 5 miles east of the Little Waldren Fork of the Takotna River. The occurrence is at an elevation of about 1,600 feet, about 0.3 mile north of hill 1790. The occurrences is about 0.6 mile southwest of the center of section 32, T. 28 N., R. 40 W., of the Seward Meridian. The location is accurate.

Geologic setting

Geologic description

This occurrence is a zone of iron-oxide-stained sandstone breccia that is locally healed by quartz (Miller and Bundtzen, 1994; Miller, Bundtzen, and Gray, 2005). The mineralized zone is of uncertain size and orientation. A prospect pit explored a similar breccia zone about 0.6 mile east of this occurrence; however, we did not sample it. One grab sample of sandstone breccia contained 420 parts per billion (ppb) mercury, 20 parts per million (ppm) antimony, and 20 ppm arsenic (McGimsey and others, 1988).
Geologic map unit (-156.746506001229, 62.466986365526)
Mineral deposit model Polymetallic vein? (Cox and Singer, 1986; model 22c).
Mineral deposit model number 22c?
Alteration of deposit Iron oxide staining.

Production and reserves

Workings or exploration Samples were collected by the U.S. Geological Survey in 1986 (McGimsey and others, 1988).
Indication of production None

References