The Gossan Ridge prospect was first identified in the late 1980s by following up highly anomaly gold, arsenic, and antimony values in panned concentrates. The anomalous values covered an area at least 1,500 meters long and 330 meters wide that coincides with a conspicuous rusty-orange color anomaly (Gold Crest Mines Inc., 2011 [summary]). Samples collected by Gold Crest in an area about 450 meters long by 200 meters wide averaged over 0.1 gram of gold per ton and contained up to 0.2 ounce of gold per ton. The mineralization is related to a series of feldspar breccias, porphyry dikes and altered country rock. Numerous epithermal arsenopyrite-stibnite-quartz veins and replacement zones occur along faults and dike margins. The intrusive rocks show pervasive biotite and sericite alteration. The rocks outside the mineralized area are Upper Jurassic or Lower Cretaceous argillite and tuffaceous chert (Box and others, 2003).The prospect was restaked and reexamined by Gold Crest in 2006 (Gold Crest Mines Inc., 2011 [summary]). They collected 39 rock samples; all had detectable gold. The highest value was 4.8 grams of gold per tonne and the samples contained up to 140 parts per million (ppm) bismuth, 25 ppm silver, 60 ppm molybdenum, 1,000 ppm antimony, 35 ppm tungsten, and 12 ppm tellurium (Gold Crest Mines Inc., 2011 [geochemistry]. Several detailed ground geophysical surveys in 2007 suggest that the prospect is the mineralized cap of a buried intrusion (Gold Crest, 2011 [aeromagnetic]).