1. Mineral Resources
  2. Online Spatial Data
  3. Alaska Resource Data File (ARDF)

Lois Dome

Occurrence, Inactive

Map
KML
XML
GeoJSON

Commodities and mineralogy

Main commodities Mn
Ore minerals psilomelane

Geographic location

Quadrangle map, 1:250,000-scale CO
Quadrangle map, 1:63,360-scale C-3
Latitude 67.72
Longitude -142.78
Nearby scientific data Find additional scientific data near this location
Location and accuracy Location plotted is locality 4 of Barker (1981, p. 33), about 1 mi (1.6 km) northeast of Lois Dome summit; located to within 2 mi (3.2 km).

Geologic setting

Geologic description

One inch (25.4 mm) vein of psilomelane in red ferruginous argillite. Minor gold values reported in a manganiferous pebble from this same locality; Mn oxide common in heavy mineral concentrates (Barker, 1981, p. 38).
Geologic map unit (-142.782706429165, 67.7197304316965)
Mineral deposit model Lode

Production and reserves

Indication of production None

Additional comments

See MAS/MILS Sequence number 0020330011 (USBM, 1995).

References

MRDS Number A106090

References

Barker, J.C., 1981, Mineral investigations in the Porcupine River drainage, Alaska: U.S. Bureau of Mines Open-File Report 27-81, 189 p., 2 sheets.
Barker, J.C., and Clautice, K.H., 1978, Mineral reconnaissance of the Porcupine River region--A summary report: U.S. Bureau of Mines Open-File Report 87-78, 20 p.
Reporters J.M. Schmidt; J.H. Dover
Last report date 9/12/1996