|Quadrangle map, 1:250,000-scale||TN|
|Quadrangle map, 1:63,360-scale||B-1|
|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).|
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.|
|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|
Cobb, E.H., 1972, Metallic mineral resources map of the Tanana quadrangle, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-371, 1 sheet, scale 1:250,000.
Cobb, E.H., 1977, Summary of references to mineral occurrences (other than mineral fuels and construction materials) in the Tanana quadrangle, Alaska: U.S. Geological Survey Open-File Report 77-432, 98 p.
Hess, F.L., 1908, The Rampart placers, in Prindle, L.M., The Fairbanks and Rampart quadrangles, Alaska: U.S. Geological Survey Bulletin 337, p. 64-98.
Mertie, J.B., Jr., 1934, Mineral deposits of the Rampart and Hot Springs districts, Alaska: U.S. Geological Survey Bulletin 844-D, p. 163-226.
Reifenstuhl, R.R., Dover, J.H., Pinney, D.S., Newberry, R.J., Clautice, K.H., Liss, S.A., Blodgett, R.B., Bundtzen, T.K., and Weber, F.R., 1997, Geologic map of the Tanana B-1 Quadrangle, central Alaska: Alaska Division of Geological & Geophysical Surveys Report of Investigation 97-15A, 17 p., 1 sheet, scale 1:63,360.
Spurr, J.E., and Goodrich, H.B., 1898, Geology of the Yukon gold district, Alaska, with an introductory chapter on the history and present condition of the district by H.B. Goodrich in Walcott, C.D., editor, Eighteenth annual report of the United States Geological Survey to the Secretary of the Interior, 1896-1897: Part III - Economic geology: U.S. Geological Survey 18th Annual Report, Part 3, p. 87-392.
|Reporters||J.E. Athey (ADGGS), D.J. Szumigala (ADGGS)|
|Last report date||7/12/2003|