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

Unnamed

Occurrence, Inactive

Map
KML
XML
GeoJSON

Commodities and mineralogy

Main commodities Mo
Other commodities W
Ore minerals molybdenite

Geographic location

Quadrangle map, 1:250,000-scale LC
Quadrangle map, 1:63,360-scale D-1
Latitude 60.9
Longitude -153.2
Nearby scientific data Find additional scientific data near this location
Location and accuracy On or near the mountaintop in the Neacola Mountains that is about 11.3 km SW of peak 6,805 (Neacola River occurrence - ARDF number LC001). Located in the NW corner of the Lake Clark D-1 quadrangle; occurrence #5 of Lambeth (1978). Location is only known within 5 km.

Geologic setting

Geologic description

Lambeth (1978) described the occurrence as coarse molybdenite with tungsten in fracture in quartz monzonite. Nelson and others (1983, unit Ti17) described the bedrock as granite and biotite-hornblende granite and granodiorite. Potassium-argon dates from samples of unit Ti17 range from about 35 to 41 m.y. (Reed and Lanphere, 1972; 1973). The rocks in the south seem to be younger than the rocks in the north (Nelson and others, 1983).
Geologic map unit (-153.202244631931, 60.8993697068438)
Mineral deposit model Porphyry Mo, Low-F? (Cox and Singer, 1986; model 21b?).
Mineral deposit model number 21b?
Age of mineralization Mineralization is Tertiary or younger. Potassium-argon dates from samples of this plutonic body range from about 35 to 41 m.y. (Reed and Lanphere, 1972; 1973).
Alteration of deposit Unknown

Production and reserves

Workings or exploration Unknown
Indication of production None
Reserve estimates No reserves
Production notes No production

Additional comments

MAS/MILS sequence number 0020930025 (Bureau of Mines, 1995). Site is in Lake Clark National Park and Preserve. This unnamed occurrence may actually be the Neacola River occurrence (ARDF number LC001).

References

MRDS Number A106366

References

Lambeth, R.H., 1978, Mineral appraisal of certain Alaska National Interest Lands, proposed Lake Clark National Park: a summary report: U.S. Bureau of Mines Open-File Report 114-78, 18 p., 4 sheets, scale 1:1,000,000.
Nelson, W.H., Carlson, C., and Case, J.E., 1983, Geologic map of the Lake Clark quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1114-A, 1 sheet, scale 1:250,000.
Reed, B.L., and Lanphere, M.A., 1972, Generalized geologic map of the Alaska-Aleutian range batholith showing potassium-argon ages of the plutonic rocks: U.S. Geological Survey Miscellaneous Field Studies Map MF-372, 2 sheets, scale 1:1,000,000.
Reed, B.L., and Lanphere, M.A., 1973, Alaska-Aleutian Range batholith: Geochronology, chemistry, and relation to circum-Pacific plutonism: Geological Society of America Bulletin, v. 84, no. 8, p. 2583-2609.
U.S. Bureau of Mines, 1995, Spatial data extracted from the Minerals Availability System/Minerals Industry Location System (MAS/MILS): U.S. Bureau of Mines Special Publication 12-95, CD-ROM.
Reporters D.P. Bickerstaff (USGS)
Last report date 6/15/1998