|Quadrangle map, 1:250,000-scale||BR|
|Quadrangle map, 1:63,360-scale||D-1|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect is centered about 0.1 mile west-northwest of VABM Fort in the SE1/4 section 1, T. 22 N., R. 30 E. of the Fairbanks Meridian. It extends from about 2,900 to 3,150 feet elevation. The location is accurate within several hundred feet.|
Geologic descriptionThis prospect is defined by a northeast-trending gossan, about a 1/4 mile long and approximately 20 feet wide, in dolomite and limestone (K.H. Clautice and J.C. Clough, unpublished field data, 1992). Proterozoic(?) to Cambrian(?) stromatolites occur in limestone float at an elevation of about 3,000 feet, between the upper and lower trenches at either ends of the gossan. A grab sample of gossan from one of the trenches contains 249 ppm lead and 927 ppm zinc (U.S. Bureau of Mines, 1995). Dark gray quartzite overlies the limestone and caps the upper 200 feet of the hill designated VABM Fort . The lithology and fossils indicate that the limestone is part of the Tindir Group (Dover, 1994).
|Geologic map unit||(-141.122223084653, 66.7575501156527)|
|Mineral deposit model||Mississippi Valley type lead-zinc deposit? (Cox and Singer, 1986; model 32?)|
|Mineral deposit model number||32?|
|Alteration of deposit||Dolomitization and iron oxides.|
|Workings or exploration||At least two shallow, hand-dug trenches mark the ends of a 1/4 mile-long gossan.|
|Indication of production||None|
Clough, J.G., Robinson, M.S., Clautice, K.H., and Blodgett, R.B., 1993, Evaluation of unit 35--Charley River and Black River quadrangles, east central Alaska; General geology, and geochemical, major oxide and lead isotope data: Alaska Division of Geological and Geophysical Surveys Public-Data File 93-35, 13 p., 1 sheet, scale 1:250,000.
Dover, J.H., 1994, Geology of part of east-central Alaska, in Plafker, George, and Berg, H.C., eds., The Geology of Alaska: Geological Society of America, p. 153-203.
|Reporters||K.H. Clautice (Alaska Division of Geological and Geophysical Surveys)|
|Last report date||3/14/2002|