Quarry

Prospect, Probably inactive

Commodities and mineralogy

Main commodities Ag; Ba; F; Pb; Zn
Other commodities Au; Sb
Ore minerals barite; boulangerite; fluorite; galena; limonite; pyrite; sphalerite
Gangue minerals ankerite; aragonite; calcite; dolomite; quartz

Geographic location

Quadrangle map, 1:250,000-scale NM
Quadrangle map, 1:63,360-scale C-2
Latitude 64.7018
Longitude -165.7664
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Quarry prospect is on a gentle ridge between Willow Creek and Cripple River at an elevation of about 900 feet and near the southeast corner of section 13, T. 9 S., R. 35 W., Kateel River Meridian. The prospect is about 1,000 feet northeast of, and visible from, the Nome-Teller road. It is probably the same deposit referred to as Kardex site Kx 52-38 in Heiner and Porter (1972) and shown at the head of Willow Creek in a claim map published by Alaska Division of Geological and Geophysical Surveys (1982). This is locality 8 of Cobb (1972 [MF 463], 1978 [OFR 78-93]).

Geologic setting

Geologic description

The Quarry prospect is in the contact zone of marble and underlying schist; the marble unit is probably part of the massive marble unit of Bundtzen and others (1994). The main minerals are quartz, fluorite, and barite that replace the marble. They occur with disseminated to semimassive pods of galena, sphalerite and boulangerite. Galena and sphalerite also occur as disseminations in aragonite and calcite veins. The occurrence is nearly stratabound, but cross-cutting replacement fronts of ankerite, partly oxidized to limonite, flank the mineral deposits. A large lead and zinc soil anomaly, about 2000 by 6000 feet and elongated northwesterly along the marble-schist contact, is developed over the prospect. Grab samples contained as much as 0.02 ounce gold per ton and 5.30 ounces silver per ton (Herreid, 1970).
Fluid inclusion studies (Brobst and others, 1971) show that mineralization was fairly high temperature (near 250 degrees F). The abundance of fluorite and slightly anomalous amounts of elements such as beryllium led Brobst and others (1971) to suggest a Late Cretaceous age of mineralization, similar to the fluorite-rich tin deposits of the northwestern Seward Peninsula.
Herreid (1970) interpreted the mineralization as being associated with a thrust at the base of the marble unit. In general, most of the relations are also consistent with mineralization controlled by shearing between two units of differing competency. The prospect is on strike with, and in a similar structural and stratigraphic setting to, the Galena prospect (NM135) about 2 miles to the northwest.
Geologic map unit (-165.769036654827, 64.701035521605)
Mineral deposit model Stratabound replacement lode of quartz-fluorite-barite with associated galena and sphalerite.
Age of mineralization Probably Late Cretaceous; post regional metamorphism.
Alteration of deposit Silicification, dolomitization, and ankeritization.

Production and reserves

Workings or exploration Some workings on the property appear to have been done about the time of World War I (Herreid, 1966, 1970). The prospect was probably re-exposed when work was done on a rock quarry for the Nome-Teller road. Fluorite-rich samples were collected by Mulligan and Hess (1965), probably from old workings. Heiner and Porter (1972) reported claim activity by Foster in 1966. The claims were later taken over by W. Hoogendorn and associates. The deposit was examined in the 1990s by Kennecott Exploration Company and by Cominco Exploration. A caved shaft probably dates from the earliest exploration.
Indication of production None

References

MRDS Number A012784

References

Alaska Division of Geological and Geophysical Surveys, 1982, Mining claim location maps -- Nome quadrangle: Alaska Division of Geological and Geophysical Surveys, 8 p., 3 sheets, scales 1:63,360 and 1:250,000.
Heiner, L.E., and Porter, Eve, 1972, Alaska Mineral Properties, volume 2: University of Alaska, Mineral Industry Research Laboratory Report 24, 669 p.
Reporters C.C. Hawley and Travis L. Hudson
Last report date 3/12/2000