Unnamed (lower Little Minook Creek)

Occurrence, Inactive

Commodities and mineralogy

Main commodities Au
Ore minerals chalcopyrite; gold; pyrite
Gangue minerals quartz

Geographic location

Quadrangle map, 1:250,000-scale TN
Quadrangle map, 1:63,360-scale B-1
Latitude 65.45677
Longitude -150.05748
Nearby scientific data Find additional scientific data near this location
Location and accuracy The exact location of this lode occurrence is unknown but is presumed to be near the Discovery claim on Little Minook Creek, about 7,000 feet upstream from the mouth of the creek (Mertie, 1934). The site is at the downstream end of placer tailings on Little Minook Creek, in the southeast quarter of section 5, T. 7 N., R. 12 W., of the Fairbanks Meridian. The site is included in location 12 of Cobb (1972) and briefly described in Cobb (1977).

Geologic setting

Geologic description

Little Minook Creek drains a relatively small area of about 6 square miles. It is straight, V-shaped, and is incised to a depth of 500-700 feet (Hess, 1908). The bedrock consists of Triassic Rampart Group mafic intrusive and volcanic rocks and sedimentary rocks (Reifenstuhl and others, 1997 [RI 97-15a]). All are considerably jointed throughout and sheared (Spurr, 1898). The shear zones, and to a lesser degree the joints and bedding planes, are mineralized with pyrite and chalcopyrite and the adjacent rock is altered to jasperoid. These zones of mineralization are common through the lower part of Little Minook Creek and on Minook Creek above the mouth of Little Minook Creek (Spurr, 1898).
In the vicinity of Little Minook Creek, Spurr (1898) reported that a 6-foot- wide quartz vein, locally with vugs lined with quartz crystals and thought to fill a shear zone, was staked by a miner named Sinclair. Panned samples of the vein yielded a small quantity of fine gold. This occurrence is a possible lode source for the placer deposits along Little Minook Creek (TN066).
Geologic map unit (-150.059999679493, 65.456300679117)
Mineral deposit model Low-sulfide Au-quartz veins (Cox and Singer, 1986; model 36a).
Mineral deposit model number 36a
Alteration of deposit The country rock adjacent to the shear zones is altered to jasperoid.

Production and reserves

Workings or exploration In the vicinity of Little Minook Creek, Spurr (1898) reported that a 6-foot wide quartz vein, locally with vugs lined with quartz crystals and thought to fill a shear zone, was staked by a miner named Sinclair. Panned samples of the vein yielded a small quantity of fine gold.
Indication of production None

References

References

Reporters J.E. Athey (ADGGS), D.J. Szumigala (ADGGS)
Last report date 7/12/2003