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Lisburne Ridge

Occurrence, Inactive

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Commodities and mineralogy

Main commodities P
Other commodities V
Ore minerals phosphorite

Geographic location

Quadrangle map, 1:250,000-scale HW
Quadrangle map, 1:63,360-scale C-2
Latitude 68.633
Longitude -156.733
Nearby scientific data Find additional scientific data near this location
Location and accuracy Location plotted is locality 42 (sample 50ATr61) from original 1950 field notes and maps of Tailleur and cited by Patton and Matzko (1959, p. 12), in T9S,R21W; at east end of westernmost Lisburne ridge, just west of Blankenship Creek; within 1000 ft (305 m).

Geologic setting

Geologic description

Sample from an 8 ft. zone of rubble of black chert, black paper shale, black shaly dolomite, and oolitic phosphate rocks in the Carboniferous Lisburne Group; there probably are 2 horizons (each about 6 in. thick) of phosphate rock (Patton and Matzko, 1959, p. 11-12). Stratigraphic position in Lisburne Group uncertain.
Geologic map unit (-156.735980260699, 68.6324973837989)
Mineral deposit model Lode; phosphorite
Mineral deposit model number 34c
Age of mineralization Carboniferous
Alteration of deposit Large dolomite rhombs replace phosphatic pellets.

Production and reserves

Workings or exploration Sample contained 24.8% P2O5 and 0.17% V2O5 (Patton and Matzko, 1959, p. 11).
Indication of production None

Additional comments

See MAS/MILS Sequence number 0020200004 (USBM, 1995).

References

MRDS Number A015682

References

Patton, W.W., Jr., and Matzko, J.J., 1959, Phosphate deposits in northern Alaska: U.S. Geological Survey Professional Paper 302-A, p. 1-17.
Reporters M.T. Powers; D.F. Huber; J.M. Schmidt; J.H. Dover
Last report date 9/30/1996