Ullrich (Judy and Deb Bench claims)

Mine, Probably inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale NM
Quadrangle map, 1:63,360-scale C-1
Latitude 64.6041
Longitude -165.3992
Nearby scientific data Find additional scientific data near this location
Location and accuracy The William H. Ullrich placer mine is on the south-facing part of the ridge between Rock Creek and Glacier Creek. The map site is at the midpoint between the Judy and Deb Bench claims (U.S. Mineral Survey No. 2271) at an elevation of 350 feet on the boundary of sections 23 and 24, T. 10 S., R. 34 W., Kateel River Meridian. The location is accurate within 250 feet.

Geologic setting

Geologic description

A high-level (bench) gold placer was discovered and probably mined as recently as the 1960,s. The claims were surveyed for patent in 1976, and two were patented in 1977. The main placer pit is excavated subparallel to a south-trending gulch into Glacier Creek; it is on the Judy Bench. Numerous pits were excavated on the upper Deb Bench claim where there are sparsely scattered, rounded granitic boulders. Most of the production from the mine was from the lower Judy Bench, but exploration cuts and granitic boulders are found at least to about 650 feet elevation, similar to some of the high-level benches near Dexter (NM246, NM247, and NM248).
The origin of the high-level bench placers is uncertain, but they predate, and furnished placer gold to, younger alluvial placers such as Glacier Creek (NM220) and Anvil Creek (NM236).
Geologic map unit (-165.401807517976, 64.6033350185129)
Mineral deposit model Alluvial placer Au; high-level bench deposit (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Probably Pleistocene; possibly Tertiary.

Production and reserves

Workings or exploration The claims were mined hydraulically, probably as recently as the 1960s.
Indication of production Yes; small

References

MRDS Number 10308000

References

U.S. Mineral Survey No. 2271 by Maurice Oswald, 1976, patent granted April 19, 1977 (available at the U.S. Bureau of Land Management, Anchorage).
Reporters C.C. Hawley and Travis L. Hudson
Last report date 7/10/2000