BTcc

Prospects, Active?

Commodities and mineralogy

Main commodities Ag; Cu; Pb; Zn
Other commodities Ba
Ore minerals chalcopyrite; cymrite; sphalerite; tennantite

Geographic location

Quadrangle map, 1:250,000-scale SP
Quadrangle map, 1:63,360-scale A-6
Latitude 67.11
Longitude -155.86
Nearby scientific data Find additional scientific data near this location
Location and accuracy This site represents several prospects in about a 6-square-mile area about 5 miles northwest of the Mauneluk River. The coordinates are for the center of the area in sec. 29, T. 20 N., R. 14 E., Kateel River Meridian. Acurracy of location is 2000 ft. The site includes localities 59 and 60 of Grybeck and Nelson (1981).

Geologic setting

Geologic description

The BTcc group of prospects explore silver-base metal volcanogenic massive sulfide deposits in a sequence of low to medium grade, metamorphosed basaltic and rhyolitic rocks, submarine ash flow tuffs, and pelitic and carbonaceous sedimentary rocks known as the Ambler schist belt. The deposits are Devonian or Mississippian based on fossil evidence and U-Pb radiometric dating (Hitzman, 1978; Hitzman and others, 1986). There are numerous prospect pits and diamond drill sites in the area dating to the late 1970s. Surface mapping has shown that the deposits extend 10 km to the west along the same stratigraphic horizon.
Geologic map unit (-155.86272769411, 67.109469920045)
Mineral deposit model Kuroko massive sulfide (Cox and Singer, 1986; model 28a)
Mineral deposit model number 28a
Age of mineralization Syngenetic deposit in Devonian or Mississippian host rocks (Hitzman and others, 1986).

Production and reserves

Workings or exploration Surface mapping and drilling.
Indication of production None

References

MRDS Number A011914

References

Hitzman, M.W., 1978, Geology of the BT claim group, southwestern Brooks Range, Alaska: Seattle, University of Washington, M.Sc. thesis, 80 p.
Hitzman, M.W., Profett, J.M., Jr., Schmidt, J.M., and Smith, T.E., 1986, Geology and mineralization of the Ambler district, northwestern Alaska: Economic Geology, v. 81, p. 1592-1618.
Reporters S.W. Nelson (Anchorage, Alaska)
Last report date 9/22/1999