|Quadrangle map, 1:250,000-scale||TK|
|Quadrangle map, 1:63,360-scale||B-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||Placer claims on Sanona Creek, a tributary of Tyone Creek, extend for about 3 miles downstream from the mouth of Fourth of July Creek. The center of these claims is at an elevation of about 3,000 feet on Sanona Creek. The location is accurate to within 1/2 mile.|
Geologic descriptionThe rocks along Sanona Creek in this vicinity consists of volcanic rocks, sandstone, and argillite of the Talkeetna Formation (Csejtey and others, 1978). Gold occurs in alluvial gravel deposits estimated to be more than 50 feet thick (Kurtak and others, 1992). The valley bottom is 400 to 800 feet wide, and the average stream gradient is less than 40 feet per mile. Thirty-three mining claims were staked in 1980 and one claim was staked in 1983 (Kurtak and others, 1992). One placer sample collected by the U.S. Bureau of Mines contains a trace of gold (Kurtak and others, 1992).
|Geologic map unit||(-147.268409153025, 62.3416180477769)|
|Mineral deposit model||Placer Au (Cox and Singer, 1986; model 39a)|
|Mineral deposit model number||39a|
|Age of mineralization||Quaternary placer.|
|Workings or exploration||Thirty-three mining claims were staked in 1980 and one claim was staked in 1983 (Kurtak and others, 1992). One placer sample collected by the U.S. Bureau of Mines contains a trace of gold (Kurtak and others, 1992).|
|Indication of production||None|
|Reserve estimates||An estimated 30 million cubic yards of potentially auriferous, gravel are in the upper part of the drainage; no grade estimate has been made (Kurtak and others, 1992).|
Additional commentsMAS/MILS number 20760102.
Csejtey, Bela, Jr., Nelson, W.H., Jones, D.L., Silberling, N.J., Dean, R.M., Morris, M.S., Lanphere, M.A., Smith, J.G., and Silberman, M.L, 1978, Reconnaissance geologic map and geochronology, Talkeetna Mountains quadrangle, northern part of Anchorage quadrangle, and southwest part of Healy quadrangle, Alaska: U.S. Geological Survey Open-File Report 78-558-A, 60 p., 1 sheet, scale 1:250,000.
|Reporters||R.K. Rogers (U. S. Geological Survey contractor)|
|Last report date||10/3/2002|