|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||This manganese lode occurrence is about 1.1 miles west of the top of Baldry Mountain. The site is at an elevation of 2,500 feet, just north of the center of section 36, T. 6 N., R. 14 W., of the Fairbanks Meridian. The site corresponds to location 10 of Cobb (1972), and roughly to the U.S. Bureau of Land Management site for Baldry Mountain (MAS number 0020480008). The location is accurate within 2 miles.|
This lode occurrence is near the axis of a northeast-trending, overturned syncline mainly of gray, finely laminated, recrystallized sericitic chert and siliceous argillite, commonly with phyllitic argillite partings (Reifenstuhl and others, 1997 [PDF 97-15a]). The rocks are assigned an early Paleozoic or Proterozoic age based on tentative correlation with the Livengood Dome Chert. The chert and argillite are cut by northeast-trending thrust faults.Burand and Saunders (1966) reported some exploration of a manganese (psilomelane) deposit west of Baldry Mountain.
|Geologic map unit||(-150.343713856879, 65.3050218742326)|
|Mineral deposit model||Epithermal Mn (Cox and Singer, 1986; model 25g) or Replacement Mn (Cox and Singer, 1986; model 19b).|
|Mineral deposit model number||25g or 19b|
|Workings or exploration||Burand and Saunders (1966) reported some exploration of a manganese (psilomelane) deposit west of Baldry Mountain.|
|Indication of production||None|
Burand, W.M., and Saunders, R.H., 1966, A geochemical investigation of Minook Creek, Rampart district, Alaska: Alaska Division of Mines and Minerals Geochemical Report 12, 15 p.
Chapman, R.M., Yeend, W.E., Brosge, W.P., and Reiser, H.N., 1982, Reconnaissance geologic map of the Tanana quadrangle: U.S. Geological Survey Open-File Report 82-734, 20 p., scale 1:250,000.
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.
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.
|Reporters||D.J. Szumigala (ADGGS)|
|Last report date||7/16/2003|