King East prospect is extended over an area of 2 x 3 km, representing a cluster of northerly trending VTEM anomalies, diorite dikes, sericitic alteration, veins, and elevated gold-in-soil values: all together highlighting the potential of a porphyry system at depth. To the south, the Upper Triassic Stuhini Group sediments are intruded by a zoned intrusion and associated alteration halo (Howson, 1990a).
- • Gold (± silver) mineralization in sub-vertical vein stockwork and breccia similar to the high-grade gold mineralization at the Valley of the Kings.
- • Anomalous Gold (>50ppb up to 6000 ppb) and Copper (>50ppm up to 2500ppm) values coincident with the margins of the altered intrusion.
- • Trench chip sampling in the same area returned values up to 1.74 g/t Au over 6.0m in siliceous siltstone units.
- • Building on the results from KH20-38, Metallis planned to fly ZTEM and SkyTEM surveys over King East for target definition. (See News Release April 07, 2021)
King East prospect is predominantly covered by thick vegetation, however some of the outcrops along creeks represent thinly bedded argillite, cherty argillite, siltstones, greywackes and finely laminated andesitic ash and crystal tuffs of the lower Stuhini Group. These stratigraphic units strike north-south and dipping to the west and remain part of a broad north-plunging anticline with moderately dipping limbs (Britten et al., 1989). The Stuhini Group rocks at King East are cut by 0.5 to 4.0m thick porphyritic diorite dikes attributed to the Texas creek suite intrusions at Kirkham property.
The diorite dikes are apparently responsible for the silicification and chlorite alteration in the Stuhini Group rocks. Scattered zones of sericite-carbonate-pyrite and coarse-grained pyrrhotite assemblage is attributed to the amygdaloidal to aphanitic intrusions in the area. Historic mapping and prospecting reported that the interbedded chert, ash tuff and argillite units at King Creek are characterized by pervasive quartz-carbonate-limonite-sulphide alteration as part of the gossans which extends for 100m to the south of King Creek (Howson, 1990). This alteration assemblage and gossans corresponds to the outer sericitic alteration and oxidation in a porphyry system as observed in the Hawilson Monzonite complex to the west.
The initial exploratory drill hole KH20-38 was designed to test the coincident VTEM and magnetic anomaly at the King East prospect. The upper 170 meters intersected a prospective silicified and pyritic siltstone/chert horizon with elevated gold values (i.e. 10.0m @ 0.14 g/t Au), which confirmed the presence of both stratabound and vein stockwork sulfide mineralization as anticipated. The lower section of the drill hole intersected a succession of greywacke and magnetite-bearing andesitic volcanics which explains the VTEM resistivity and mag anomaly in the area. KH20-38 provided a distinct inside-out vector of sericitic to propylitic alteration to the west, highlighting significant exploration potential to the east with anomalous Cu-in-soil along magnetic lows.
Building on the results from KH20-38, Metallis planned to carry out detailed geological mapping and additional soil-rock sampling focusing the porphyry, shear-vein gold, and sedimentary exhalites potential in the folded stratigraphic sequence along the eastern Kirkham property bordered with the Eskay Mining Corp. An extensive ZTEM and SkyTEM surveys over King East is also planned to better interpret the geology and target definition at King East (See News Releases April 07 and May 25, 2021).