Telaquana Pass

Occurrence, Inactive

Commodities and mineralogy

Main commodities Mo
Ore minerals magnetite; molybdenite; pyrite; pyrrhotite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale LC
Quadrangle map, 1:63,360-scale D-2
Latitude 60.926
Longitude -153.442
Nearby scientific data Find additional scientific data near this location
Location and accuracy In a divide between the Telaquana River drainage and the Neacola River drainage, about 11.2 km E-SE from the mouth of Telaquana River. This is locality 4 of Nelson and others (1985) and locality 18 of Mackevett and Holloway (1977). NE1/4SE1/4 sec. 25, T. 10 N., R. 24 W., of the Seward Meridian. Location accurate to within 300 m.

Geologic setting

Geologic description

Resource Associates of Alaska (1976) reported molybdenite in veinlets of quartz and pyrite in quartz diorite near contact with granite. Large area of iron-staining due to weathering of pyrite veins and disseminated pyrite and pyrrhotite. MacKevett and Holloway (1977) describe the occurrence as being hosted in a composite Tertiary granitic pluton. Nelson and others (1983, unit Ti17) describe the rocks as uniformly grayish-white, coarse-grained biotite granite with lesser biotite-hornblende granite and granodiorite. There is some magnetite in quartz-magnetite veins. Adjacent granite is not mineralized. Resource Associates of Alaska (1976) reported a sample that yielded 2,200 ppm Mo. Nelson and others (1985) could not confirm the molybdenite occurrence.
The age of the granite host rock is Tertiary. Potassium-argon dates on samples from this granitic body range from 35 to 41 m.y. (Reed and Lanphere, 1972; 1973).
Geologic map unit (-153.444261326781, 60.9253515257299)
Mineral deposit model Porphyry Mo, Low - F (Cox and Singer, 1986; model 21b)
Mineral deposit model number 21b
Age of mineralization Granite host is Tertiary. Potassium-argon dates on samples from this granitic body range from 35 to 41 m.y. (Reed and Lanphere, 1972; 1973).

Production and reserves

Workings or exploration Resource Associates of Alaska (1976) reported a sample that yielded 2,200 ppm Mo.
Indication of production None

Additional comments

Site is in Lake Clark National Park and Preserve.

References

MRDS Number A013022

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