Telaquana River

Occurrence, Inactive

Commodities and mineralogy

Main commodities Mo
Ore minerals molybdenite; pyrite

Geographic location

Quadrangle map, 1:250,000-scale LC
Quadrangle map, 1:63,360-scale D-2
Latitude 60.931
Longitude -153.552
Nearby scientific data Find additional scientific data near this location
Location and accuracy Approximately 1.8 km north (upstream) from confluence of an unnamed southward flowing stream and the Telaquana River. This is locality 3 of Nelson and others (1985) and locality 17 of MacKevett and Holloway (1977). SW1/4NW1/4 sec. 28, T. 10 N., R. 24 W., of the Seward Meridian. Accurate to within 450 m.

Geologic setting

Geologic description

Sparse disseminations of molybdenite in contact zone of granodiorite and metamorphosed volcanic sedimentary rocks related to a roof pendant with marble that is heavily iron-stained and pyritized. Three of eight rock samples collected contained Mo, one sample with 3,200 ppm Mo (Nelson and others, 1985). The occurrence coincides with NW trending faults and a NE lineament.
The granodiorite is a medium-gray, medium-grained biotite-hornblende granodiorite (Nelson and others, 1983, unit Ti16). Potassium-argon dates on biotite and hornblende from one specimen of this unit yielded ages of about 31 to 35 m.y. (Reed and Lanphere, 1972; 1973).
Geologic map unit (-153.55426840198, 60.9303440770379)
Mineral deposit model Porphyry Mo, Low - F (Cox and Singer, 1986; model 21b)
Mineral deposit model number 21b
Age of mineralization Tertiary or younger. Potassium-argon dates on biotite and hornblende from one granodiorite specimen yielded ages of about 31 to 35 m.y. (Reed and Lanphere, 1972; 1973).
Alteration of deposit Pyritization, strong iron-staining, and chlorite-epidote alteration of granodiorite.

Production and reserves

Workings or exploration Three of eight rock samples collected contained Mo (one with 3,200 ppm Mo). Nelson and others (1985) reported a weak halo of anomalous zinc concentration. No geochemical values provided.
Indication of production None

Additional comments

Site is in Lake Clark National Park and Preserve.

References

MRDS Number A013021

References

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.
Resource Associates of Alaska, Inc., 1976, Geology and geochemistry of certain land within the Lake Clark National Park: Contract report for U.S. Bureau of Mines, Contract JO166108, 7 v.
Reporters M.L. Miller (USGS); D.P. Bickerstaff (USGS)
Last report date 6/15/1998