Dempsey

Prospect, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals gold

Geographic location

Quadrangle map, 1:250,000-scale MH
Quadrangle map, 1:63,360-scale A-2
Latitude 63.0388
Longitude -144.8525
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Dempsey prospect is in the main valley of the Chistochina River about one-half mile below the mouth of the Chisna River. The prospect is in the SE1/4NW 1/4 section 3, T. 22 S., R. 15 E., Fairbanks Meridian. The prospect may extend south as far as the mouth of Daisy Creek, which enters the Chistochina River about one mile below the abandoned site of Dempsey on the Mount Hayes A-2 quadrangle. The Dempsey prospect is locality 22 on figure 6 of Cobb (1979 [OFR 79-238]) and locality 17 in table 3 of Nokleberg and others (1991), and it is about one mile west in the Daisy Creek drainage.

Geologic setting

Geologic description

The Dempsey prospect explored and attempted to develop auriferous bench gravels on the west side of the Chistochina River, a major glacier-fed river. Near Dempsey and as far south as the mouth of Daisy Creek, the flood plain of the modern Chistochina River is narrow, and there is an extensive bench developed on the west side of the river. The bench gravels are frozen locally; they contain small amounts of fine-grained gold. The area was prospected and a ditch was constructed in 1907; a prospect tunnel was reportedly driven in frozen bench gravels near Daisy Creek (Moffit, 1909; Brooks, 1910), but a mineable deposit was not found (Moffit, 1912).
Geologic map unit (-144.854718207268, 63.0383950579055)
Mineral deposit model Placer Au, glacio-fluvial (Cox and Singer, 1986; model 39a).
Mineral deposit model number 39a
Age of mineralization Pleistocene.

Production and reserves

Workings or exploration Explored by surface workings and a tunnel (adit) driven in frozen bench gravels (Moffit, 1909, 1912).
Indication of production None

References