Babybasket

Occurrence, Inactive

Commodities and mineralogy

Main commodities Cu; Zn
Other commodities Ag; Pb
Ore minerals chalcopyrite; pyrite; sphalerite
Gangue minerals calcite; quartz

Geographic location

Quadrangle map, 1:250,000-scale MD
Quadrangle map, 1:63,360-scale A-2
Latitude 63.1
Longitude -153.82
Nearby scientific data Find additional scientific data near this location
Location and accuracy The Babybasket occurrence is situated just south of the highest point in the Babybasket Hills (1,455 ft summit) at an elevation of 1,250 feet (381 m) in Section 36, T. 27 S., R. 26 E., of the Kateel River Meridian. Location is imprecise and judged to within a two mile (3.2 km) radius.

Geologic setting

Geologic description

The Babybasket prospect consists of several zones of disseminated chalcopyrite, pyrite and rare sphalerite in calc-silicate skarn and carbonate replacement zones. The mineralized zones are adjacent to gabbro-diorite dikes and sills that intrude Cambro-Ordovician silty limestone and shale of the Lyman Hills Formation, the lower-most part of the Dillinger subterrane as defined by Bundtzen and others (1997). No size or orientations of mineralized zones are known.
The occurrences were detected as a result of anomalous values found in stream sediment and pan concentrate samples collected by the U.S. Geological Survey (King and others, 1980; 1983). Age is probably either Paleozoic or Triassic, based on isotopic age data collected from equivalent gabbro-diorite sills in the McGrath quadrangle (Bundtzen and others, 1997).
Geologic map unit (-153.822281641511, 63.099408184313)
Mineral deposit model Polymetallic replacement deposit? (Cox and Singer, 1986; model 19a?).
Mineral deposit model number 19a?
Age of mineralization The Babybasket occurrence is probably either Paleozoic or Triassic, based on isotopic age data collected from equivalent gabbro-diorite sills in the McGrath quadrangle (Bundtzen and others, 1997).

Production and reserves

Workings or exploration The Babybasket occurrence was found as the result of sampling by the U.S. Geological Survey (King and others, 1980; 1983).
Indication of production None
Reserve estimates None.

Additional comments

Similar deposits are described in the McGrath and Lime Hills quadrangles (Bundtzen and others, 1994; 1997).

References