The Spearhead occurrence is located at an elevation of approximately 1400 metres in a northeast-facing mountain valley, south of Sulphurets Creek and northwest of the toe of the Ted-Morris Glacier.
Regionally, the area is underlain by marine sedimentary and volcanic rocks of the Upper Triassic Stuhini Group and andesitic volcanic rocks of the Middle Jurassic Salmon River Formation (Hazelton Group).
In 2006, prospectors investigating an AeroTEM electromagnetic conductor in the eastern part of the property discovered the Spearhead showing within a northwest trending, two hundred by one hundred metre outcrop of silicified rhyolite. The blanket of ice and snow that covered the Spearhead showing in previous years melted away in the late summer of 2006. Geological mapping and sampling in 2006 demonstrated that the host rhyolite-mudstone sequence at Spearhead belongs to the Eskay-equivalent Middle Jurassic Salmon River Formation (Hazelton Group), with a style of mineralization and geological relationships very similar to those at the HSOV zone (MINFILE 104B 387) located 2 kilometres to the west. However, mineralization and alteration at Spearhead are much more extensive than at HSOV.
Limited drilling at the end of the 2006 season intersected mudstone containing a 1.2 metre-wide interval of laminated fine grained massive pyrite with zinc enrichments of up to 0.2 per cent, as well as pyrite-sphalerite-quartz veinlets (Assessment Report 30131). Another notable assay samples include sample CB692, a quartz-carbonate-pyrite-chalcopyrite vein at the Spearhead showing that yielded 0.4 per cent copper veinlets (Assessment Report 30131).
The main finding of the 2007 exploration season is that the C10 (MINFILE 104B 240), Red Lightning (MINFILE 104B 605), HSOV and Spearhead zones occur in a common stratabound sequence that underlies and extends beyond the Mandy Creek valley area.
Refer to Cumberland (MINFILE 104B 011) for details of the Corey property work history.