Unnamed (Sledge Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals limonite
Gangue minerals feldspar; quartz

Geographic location

Quadrangle map, 1:250,000-scale NM
Quadrangle map, 1:63,360-scale C-2
Latitude 64.634
Longitude -165.5105
Nearby scientific data Find additional scientific data near this location
Location and accuracy Sledge Creek is a west tributary to Snake River; this location is on the ridge crest south of Sledge Creek at an elevation of about 420 feet and about 700 feet upslope of a water ditch. A quartz-feldspar vein and nearby prospect pits are present. It is in the east-central part of section 6, T. 10 S., R. 34 W., Kateel River Meridian.

Geologic setting

Geologic description

Quartz-feldspar veins crop out south of Sledge Creek just upstream of where Sledge Creek enters onto the Snake River valley and about 700 feet upslope from a water ditch. This occurrence appears to be similar to a quartz-feldspar vein described by Cathcart on the north side of Sledge Creek (Cathcart, 1922, p. 249, figure 19, location 2), who also identified feldspar at the occurrence on the north side of Sledge Creek as orthoclase, probably because of its nearly euhedral platy form. The feldspar is probably albite or a sodic oligoclase similar to the platy feldspar found abundantly at the Alpha Ridge prospect (NM171) about a half mile south of this occurrence. Sulfides were not observed by Cathcart, but the vein was iron-stained. Similar nearby quartz-feldspar veins are gold bearing.
Geologic map unit (-165.513106805603, 64.63323231463)
Mineral deposit model Low-sulfide Au-quartz vein? (Cox and Singer, 1986; model 36a).
Mineral deposit model number 36a?
Age of mineralization Mid-Cretaceous or younger; cross cuts metamorphic rocks of that age.

Production and reserves

Workings or exploration The veins were explored by shallow pits, some of which were excavated before Cathcart's visit in 1920.
Indication of production None

References

MRDS Number 10307978

References

Reporters C.C. Hawley and Travis L. Hudson
Last report date 3/12/2000