|Current site name||Unnamed (in headwaters of Grubstake Creek)|
|Geographic coordinates:||-144.03263, 62.78768 (WGS84)|
|Relative position||A copper-gold porphyry is exposed in upper Grubstake Creek. The location is the approximate of the porphyry system. It is about two-thirds of the way south along the section line between 25 and 26, T. 12 N., R. 7 E., Copper River Meridian. The deposit is approximately three-quarters of a mile long by one-half mile wide and is probably continuous with a similar porphyry in upper Slope Creek (GU020). The location is accurate.|
|(click for info)|
|Materials||Type of material|
|USGS model code||20c|
|Deposit model name||Porphyry Cu-Au|
|Mark3 model number||34|
|Agency||Database name||Acronym||Record ID||Notes|
|USGS||Alaska Resource Data File||ARDF||GU019|
Richter, D.H., 1964, Geology and mineral deposits of the Ahtell Creek area, Slana District, south-central Alaska: Alaska Division of Geological and Geophysical Surveys Geologic Report 6, 17 p., 1 sheet, scale 1:31,680.
Richter, D.H., 1966, Geology of the Slana district on south-central Alaska: Alaska Division of Geological and Geophysical Surveys Geological Report 2l, 36b p., 3 sheets, scale 1:63,360.
Richter, D.H., and Matson, N.A., 1968, Distribution of gold and some base metals in the Slana area, eastern Alaska Range, Alaska: U.S. Geological Survey Circular 593, 20 p.
St. George, Phil, 1992, 1992 Ahtna Lands. Gulkana Quad Reconnaissance: Cominco Alaska Exploration, 1 p., maps, scale 1:63,360. (Report held by Ahtna Minerals Co., Anchorage, Alaska).
Bull, Katharine, Schneider, Craig, and Freeman, Larry, 1997, Summary report for Ahtna Corporation: 12 p., appendices and maps. (Report available, Ahtna Minerals Co., Anchorage, Alaska).
Bull, Katharine, Freeman, Larry, and Schneider, Craig, 1999, Slana property summary report for Homestake Mining Company: 11 p. and analytical appendices. (Report available, Ahtna Minerals Co., Anchorage, Alaska).
|Subject category||Comment text|
|Deposit||Model Name = Porphyry Cu-Au (Cox and Singer, 1986; model 20c)|
|Deposit||Other Comments = Upper Grubstake Gulch contains part of a copper-gold porphyry that only has been examined in reconnaissance. Additional information can be obtained from Ahtna Minerals in Anchorage, Alaska.|
|Reporter||20-DEC-00||W.T. Ellis||Alaska Earth Sciences|
|Reporter||20-DEC-00||Hawley, C.C.||Hawley Resource Group|
|Reporter||20-DEC-00||W.J. Nokleberg||U.S. Geological Survey|