In the QE showing area Upper Triassic Stuhini Group rock is cross-cut by a granitoid batholith and stocks of the Eocene Coast Plutonic Complex that displays a range of rock types including medium- to coarse-grained biotite plus/minus hornblende granite and granodiorite with minor quartz diorite.
Cache Minerals reported an abundance of quartz veining in the area while prospecting from 2011 to 2013 (inclusive). White bull quartz veins follow the regional trend of easterly to east-southeast, typically striking 110 to 120 degrees. The quartz veins range from 5 to 10 centimetres to upwards of 2 metres in thickness and are inclined 50 degrees to vertical. In most cases veins, pyrite, chalcopyrite, galena, and occasionally sphalerite mineralization was noted, mostly concentrated along the selvages of the veins. The veins injected into mafic to intermediate meta-volcanic rocks.
The meta-volcanic rocks exhibit regional chloritic to biotitic metamorphism with a texture ranging from schistose to moderately gneissic. Highlights from 2013 vein grab samples include sample 13-QECG-10 that graded 32.6 grams per tonne gold, 285.0 grams per tonne silver, 0.30 per cent copper, 0.56 per cent lead, 0.155 per cent antimony (Assessment Report 34427). Samples containing economic grades of gold, silver, copper and lead, were identified intermittently along a 1-kilometre trend.
Work History
In 2011 a 4-person field crew of Cache Minerals visited the Quinn Eskay claims. The prospecting and sampling program was limited by time constraints; however, several areas of the property were visited, and the program identified areas of anomalous gold and base metal potential. A sample of medium-grained, rusted, mesocratic tonalite hosting quartz vein, collected in 2011 by Cache Minerals, assayed 0.446 gram per tonne gold (Assessment Report 32600).
In 2012, Cache Minerals collected 17 rock samples. An angular float sample containing 30.7 grams per tonne gold, 159 grams per tonne silver, and 4.47 per cent copper was discovered on the property (Assessment Report 33527). The float sample was believed to be near-source.
In 2013, Cache Minerals prospected for the source of the anomalous float samples from 2012 and collected 32 rocks samples (Assessment Report 34427).