Prospect, Active?

Commodities and mineralogy

Main commodities Ag; Cu; Zn
Other commodities Au; Pb
Ore minerals chalcopyrite; galena; gold; pyrite; silver; sphalerite
Gangue minerals calcite; quartz; sericite

Geographic location

Quadrangle map, 1:250,000-scale AR
Quadrangle map, 1:63,360-scale A-2
Latitude 67.219
Longitude -156.68
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Bud prospect is located in section 16, T. 21 N., R. 10 E., of the Kateel River Meridian, at an elevation of approximately 2,600 ft. This location is accurate to within 1000 feet.

Geologic setting

Geologic description

The Bud Prospect hosted in Ambler sequence of metamorphosed Devonian and Mississippian volcanic, volcaniclastic, and sedimentary rocks. Ore minerals are concentrated in a felsic tuffaceous sedimentary section of rocks containing numerous basalt sills and flows immediately above a basal carbonate section (Hitzmann and others, 1986).
The local stratigraphy at Bud include over 700 feet of white-green quartz mica schist, non-porphyritic white rhyolite, button schist, porphyroblastic white schist, graphite schist, and varieties of mafic metacarbonate and greenstone. Both footwall and hanging wall units are composed of quartz-chlorite-muscovite schist. In general, the entire sequence has an average strike of on N 70 W, and dips southward at 35 to 50 degrees. The mineralized horizon at Bud is stratigraphically the same as the Sunshine Creek (AR028), prospect approximately 1 mile to the east (Ellis, 1984).
Geologic map unit (, )
Mineral deposit model Kuroko massive sulfide (Cox and Singer, 1986; model 28a).
Mineral deposit model number 28a
Age of mineralization Devonian, based on age of host rock (Ellis, 1984).
Alteration of deposit Quartz, chlorite, calcite, and sericite alteration is associated with mineralization (Ellis, 1980).

Production and reserves

Workings or exploration Initial exploration efforts started in the mind 1970s and includes surveys such as soil, stream sediment, and rock sampling, hand trenching, geologic mapping, geophysical surveys, and 3,670 ft of diamond core drilling in seven holes. Exploration was completed by Sunshine Mining Company in 1974 and subsequent exploration through drilling was completed Anaconda Copper Company. The discovery gossan contains 0.05 to 0.25 ounces per ton gold. Drill hole Bud 87-03 assayed 1.7 percent copper, 0.41 percent lead, 1.5 percent zinc 2.0 ounce per tonne silver and 0.017 ounce per ton gold (Ellis, 1984).
Indication of production None



Ellis, W.T., 1980, Ambler River Project, Alaska, Project Memorandum No. 7, Summary Report of Past Field Investigations and 1980 Field Investigations, Sunshine Mining Company, 114 p. (Report held at Alaska Earth Sciences, Inc., Anchorage, AK).
Sicherman, H.A., Russell, R.H., and Fikkan, P.R., 1976, The geology and mineralization of the Ambler district, Alaska: Spokane, Wash., Bear Creek Mining Company, 22 p.
Reporters A. Angel (Alaska Earth Sciences, Inc.); V.C. Zinno (Alaska Earth Sciences, Inc.)
Last report date 3/11/2014