|Quadrangle map, 1:250,000-scale||MH|
|Quadrangle map, 1:63,360-scale||B-5|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||This prospect is at an elevation of about 4,600 feet in the headwaters of an east-flowing tributary to the stream(s) in Broxson Gulch, in the NW1/4NW1/4 section 34, T. 18 S., R. 8 E., Fairbanks Meridian. The locality corresponds to locality 5 on figure 3 of Rose (1966 [ADMM GR 20]) and to locality 42 in table 2 of Nokleberg and others (1991).|
The rock at this prospect consists of dacite agglomerate of the Slana Spur Formation of Late Paleozoic age (Rose, 1966 [ADMM GR 20, figure 3]; Nokleberg and others, 1991). Nokleberg and others proposed that the rock is meta-andesite porphyry.The prospect is on a mineralized shear zone that strikes N85W and dips 35 degrees southwest; the shear zone can be traced for several hundred feet. Locally, the sheared andesite is altered to a chlorite-epidote rock that contains pyrite, chalcopyrite, and bornite. Some of the mineralized rock is coated with malachite. A foot-wide sample collected by Rose (1966 [ADMM GR 20]) assayed 2.95 percent copper and 2.2 ounces of silver per ton. Samples 79IL047A and B collected by the U.S. Geological Survey assayed as much as 3.8 percent copper, 50 parts per million (ppm) silver and 0.1 ppm gold (Nokleberg and others, 1991).
|Geologic map unit||(-146.201064457592, 63.3162780054253)|
|Mineral deposit model||Low-sulfide copper vein.|
|Age of mineralization||Late Paleozoic or younger; the mineralized shear zone cuts Upper Paleozoic rocks.|
|Alteration of deposit||Chlorite-epidote alteration of the volcanic host rock; local oxidation of copper minerals.|
|Workings or exploration||
The prospect was staked by a Moneta-Porcupine Company prospector in 1964. Surface workings include a shallow trench and several small pits. A sample across a one-foot width assayed 2.95 percent copper and 2.2 ounces of silver per ton (Rose, 1966 [ADMM GR 20]).The prospect is on active MAN Resources claims.
|Indication of production||None|
Nokleberg, W.J., Lange, I.M., Roback, R.C., Yeend, Warren, and Silva, S.R., 1991, Map showing locations of metalliferous lode and placer mineral occurrences, mineral deposits, prospects, and mines, Mount Hayes quadrangle, eastern Alaska Range, Alaska: U.S. Geological Survey Miscellaneous Field Studies Map MF-1996-C, 42 p., 1 sheet, scale 1:250,000.
|Reporters||W.T. Ellis (Alaska Earth Science), C.C. Hawley (Hawley Resource Group), and W.J. Nokleberg (USGS)|
|Last report date||6/18/2001|