Unnamed (southeast of Merrill Pass)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Ag; Mo; Pb; Zn
Ore minerals galena; molybdenite; pyrite; sphalerite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale LH
Quadrangle map, 1:63,360-scale A-1
Latitude 61.1502
Longitude -153.2479
Nearby scientific data Find additional scientific data near this location
Location and accuracy This occurrence is on the west side of a south tributary valley to the upper Another River. It is about 3.8 miles southeast of Merrill Pass and 2.8 miles northwest of The Tusk. The map site is at an elevation of about 3,600 feet, in the NW1/4 section 7, T 12 N, R 22 W, of the Seward Meridian. This occurrence was included by Cobb and Reed (1981) under the name Another R. It is approximately located, perhaps within a mile.

Geologic setting

Geologic description

Cobb and Reed (1981) reported that molybdenite- and pyrite-bearing quartz veins are present in Tertiary granitic rocks at this locality. Galena- and sphalerite-bearing veins are also present nearby. The veins are disseminated and appear to be associated with quartz monzonite and in adjacent fractured quartz diorite. Samples of veins contain as much as 3 ounces of silver per ton (Resource Associates of Alaska, unpublished data, 1976).
Geologic map unit (-153.25012888955, 61.1495651890996)
Mineral deposit model Porphyry Mo, low-F? (Cox and Singer, 1986, model 21b)
Mineral deposit model number 21b
Age of mineralization Tertiary. Sulfide-bearing quartz veins crosscut Tertiary granitic rocks.
Alteration of deposit Silicification.

Production and reserves

Workings or exploration Reconnaissance sampling has been completed in this area.
Indication of production None

Additional comments

This occurrence is within Lake Clark National Preserve.

References

MRDS Number A013078

References

Reporters Travis L. Hudson and Madelyn A. Millholland
Last report date 6/10/2001