The Heath North prospect is reported to be hosted within mafic-ultramafic intrusions intruding into a Late Triassic to Early Jurassic diorite host of the Hogem Plutonic Suite. The mafic-ultramafic intrusions contain disseminated pyrite and chalcopyrite with significant magnetite mineralization. The area of copper mineralization was reported initially (from 2011 fieldwork) to be 600 by 900 metres in area.

In 2011, Kiska Metals collected 34 rock samples (30 granitoids). Whole rock samples contain up to 0.79 per cent copper and 0.29 gram per tonne gold (Assessment Report 32504). These grab samples showed strong correlation between copper-gold-silver whereas a coincident copper-zinc-lead-arsenic soil anomaly (Heath-CN) contains up to 2610 parts per million copper and 72 parts per billion gold (Assessment Report 32504). Grab sample L647552 assayed 0.66 per cent copper, 0.29 gram per tonne gold and 8 grams per tonne silver (Assessment Report 32504, 34932 (Figure 15)).

WORK HISTORY

In 2006, Redton Resources and Geoinformatics Exploration Canada Inc. undertook work on the regionally extensive Redton property which covered the Falcon prospect (093N 068) to the south (just north of Nation Lake) and north to the Takla Rainbow (093N 082) and the Tak prospect (093N 067), about 6 kilometres south of the Omineca River.

In 2010, a subsequent AeroTEM survey by Geoinformatics and Redton Resources identified 65 EM anomalies on the property (Assessment Report 31933).

In 2011, Rimfire Minerals Corp collected a total of 121 rock, 37 silt and 2269 soil samples on the Redton property (Assessment Report 32504). Soil geochemistry (1100 samples) and reconnaissance prospecting (17 rock samples) was completed over the north and central blocks of the property, identifying several new soil geochemical anomalies. Redton-North polymetallic soil anomalies include Tak North (1000 metres north of the Tak MINFILE occurrence plotted location), and Duckling (1500 metres northeast of Tak). Redton Central polymetallic soil anomalies include Lin 2011, north of Kwanika Creek, and Ruby Wren, Chachalaca, Burn West, and Good Old Lorne, all south of Kwanika Creek. The 2011 Redton-South field program included geological mapping, prospecting (99 rock samples), soil/silt sampling (1125 soils, 37 silts) and about 64 line-kilometres of ground-based IP/resistivity and magnetics. Work in Redton-South delineated a new target are, the Contact Zone (093N 229, 230 and 231). Prospecting and mapping of the Heath-North prospect (new MINFILE in 2016) defined a 600 by 900 metre zone of minor copper mineralization (Assessment Report 32504).

In 2011, intense sampling was done at the Heath-North prospect, with 34 samples (30 granitoids) collected. 2011 soil sampling by Kiska on the Heath-North grid helped to define two polymetallic anomalies (Heath-CN, Heath-Sat) as well as high background arsenic-in-soil values. The Heath-CN anomaly contains relatively high Copper –zinc and lead-in-soil, and is continuous with a historical copper-in-soil anomaly defined by Teck Cominco (Assessment Report 20552). The Heath-Sat anomaly comprises coincident elevations of Copper-molybdenum and lead-in-soil values that measures 2 by 1.1 kilometre in area and was open (in 2011) to the north.

In 2012, Kiska Metals (previously Rimfire Minerals Corporation) conducted a field program, consisting of soil sampling and prospecting as operator of the Redton property (Assessment Report 34050). A total of 568 soil samples were collected in 2012, largely expanding on previous work.

In 2014, Kiska Metals focused mainly on an orientation survey at Falcon which consisted of re-sampling of drill core and surface rock sampling from outcrops around the Falcon drill area (Assessment Report 34932). Kiska also conducted one day of surface geological work at the new Heath North prospect consisting of reconnaissance geological mapping and surface rock sampling.