|Quadrangle map, 1:250,000-scale||TC|
|Quadrangle map, 1:63,360-scale||A-6|
|Nearby scientific data||Find additional scientific data near this location|
|Location and accuracy||The Hunter prospect is about 8.0 miles west-southwest of the junction of the Tok and Dry Tok Rivers. It is about 2.0 miles south of VABM 7302 'White'; about 0.2 mile west of the center of section 29, T. 16 N., R. 8 E., of the Copper River Meridian. The location is accurate to within 500 feet.|
The rocks in the area are part of the Tok Schist and consists mainly of quartz-muscovite schist with a thick layer of quartz-chlorite schist (Rhyolite Resources Ltd., 2012a). The Tok Schist is cut by several steep to vertical faults, one of which control the trend of the mineralization at the nearby Shalosky prospect (TC042). To the north across a north-dipping thrust fault, the rocks are a folded sequence of argillaceous sediments, felsic-sulphidic schist, chlorite schist, feldspar-quartz schist, banded sedimentary rocks, and gabbro. The age of the rocks is uncertain; Foster (1970) only indicates that they are Paleozoic or Mesozoic.
The mineralization in the area is sediment hosted and controlled by structure; it is associated with zones of silicification and quartz-vein stockwork (Rhyolite Resources Ltd., 2012b). Sulfides vary from 1 to more than 20 percent of the mineralization. There is a strong geochemical association of the gold with arsenic and antimony; copper, lead, zinc, bismuth, tellurium, and silver are low.
From 1998 through 2001, Grayd Resources and Placer Dome Inc. explored the area (Rhyolite Resources Ltd., 2012a); Rhyolite Resources Ltd., 2012b). They collected many rock and geochemical samples, trenched, and drilled 12 holes in the area totaling 1,174 meters in the area, but the data are not publicly available. It is likely that they discovered the Hunter prospect and drilled at least one hole. In 2009, Rhyolite Resources acquired the property and identified 3 high-priority areas that included the Hunter prospect.The one Placer Dome hole cut 4.4 meters with 0.8 gram of gold per tonne. Rhyolite Resources Ltd. (2011; 2012a; 2012b) drilled two holes totaling 323 meters at the Hunter prospect in 2011 and collected surface samples. A trench 6.3 meters long averaged 9.6 grams of gold per tonne and they drilled where surface samples contained up to 50.8 grams of gold per tonne. Neither of the Rhyolite holes cut significant gold values. One hole cut 3.9 meters with 256.1 grams of silver per tonne; this included 0.9 meter that contained 963 grams of silver per tonne and 6,230 parts per million tungsten. The mineralization is associated with highly fractured and altered metasedimentary rocks that hindered core recovery.
|Geologic map unit||(-143.947939207501, 63.1389237586695)|
|Mineral deposit model||Gold-quartz in veins and brecciated zones; lower grade disseminated mineralization? (Cox and Singer, 1986; model 22c)|
|Mineral deposit model number||22c?|
|Age of mineralization||Unknown other than that it is younger than the Paleozoic or Mesozoic host rocks (Foster, 1970).|
|Alteration of deposit||The mineralization is associated with highly fractured and altered metasedimentary rocks (Rhyolite Resources Ltd., 2012b).|
|Workings or exploration||
Gold mineralized schist with quartz-sulfide veining and alteration was discovered in outcrop by geologist Ed Hunter in 1996 exploring on behalf of American Copper & Nickel Company, Inc. (S. Dashevsky, President, Northern Associates Inc., written communication, 2014).
From 1998 through 2001, Grayd Resources and Placer Dome Inc. explored in the area (Rhyolite Resources Ltd., 2012a; 2012b). They collected many rock and geochemical samples, trenched, and drilled 12 holes totaling 1,174 meters,but the data is not publicly available. It is likely that they discovered the Hunter prospect and drilled at least one hole.
In 2001, a 50 meter long trench was sampled for Grayd Resources Inc. with a reported 6.3 meter section returning 9.6 grams of gold per tonne. A 2001 diamond drill hole collared approximately 50 meters east of the Hunter trench reportedly returned a best interval of 0.8 gram of gold per tonne over 4.4 meters. Field indications suggest that the mineralized target was not adequately tested by the orientation of that single drill hole (Rhyolite Resources Ltd., 2014).
In 2009, Rhyolite Resources acquired the property and identified 3 high-priority areas that included the Hunter prospect. Rhyolite Resources Inc. (2012a; 2012b) drilled two holes totaling 323 meters at the Hunter prospect in 2011 and collected surface samples (S. Dashevsky, President, Northern Associates Inc., written communication, 2014).
During the 2010 field season, Northern Associates, Inc. geologists working on behalf of Rhyolite Resources Ltd. collected confirmation grab samples from the collapsed trench that returned 5.37 grams of gold per tonne and 50.80 grams of gold per tonne, while a 2.5 meter channel sample returned 1.0 gram of gold per tonne (S. Dashevsky, President, Northern Associates Inc., written communication, 2014).In 2011, Rhyolite Resources again attempted to test the Hunter prospect with two core holes, comprising 323 meters collared at the Hunter showing, by drilling at an opposing azimuth to the 2001 hole drilled by Grayd & Placer-Dome (S. Dashevsky, President, Northern Associates Inc., written communication, 2014). Neither hole encountered significant gold mineralization, but highly anomalous silver/tungsten values were found in highly broken and altered metasediments at the interface of overburden and bedrock. The mineralized interval had very poor core recovery - less than 50 percent. The very high silver value was 963 grams of silver per tonne (Rhyolite Resources Ltd., 2014).
|Indication of production||None|
Cox, D.P., and Singer, D.A., eds., 1986, Mineral deposit models: U.S. Geological Survey Bulletin 1693, 379 p.
Foster, H.L., 1970, Reconnaissance geologic map of the Tanacross quadrangle, Alaska: U.S. Geological Survey Miscellaneous Geological Investigations Map I-593, 1 sheet, scale 1:250,000.
http://www.rhyoliteresources.com/s/Paxson.asp (as of December 3, 2014).
Rhyolite Resources, Ltd., 2011, Rhyolite drilling extends gold discoveries at Paxson: Highlight include 1.6 gr/t Au over 70.1 meters. 1.0 g/t Au over 100.1 m and 8.6 g/t over 2.2 m: http://www.rhyoliteresources.com/s/NewsReleases.asp?ReportID=490614&_Type=News-Releases&_Title=Rhyolite-Drilling-Extends-Gold-Discoveries-at-Paxson-Highlights-Include-1.6... (News release, November 8, 2011).
Rhyolite Resources Ltd. 2012a, (Corporate Presentation): http://www.rhyoliteresources.com/i/pdf/CorporatePresentation.pdf (as of February 18, 2012).
Rhyolite Resources Ltd., 2012b, Projects overview: http://www.rhyoliteresources.com/s/Projects.asp (as of February 23, 2012).
Rhyolite Resources Ltd., 2014, Paxson Project:
|Reporters||D.J. Grybeck (Contractor, USGS); V.C. Zinno (Alaska Earth Sciences, Inc.)|
|Last report date||12/12/2014|