Seabridge Gold Inc. reports its first mineral resource estimate (MRE) for the Bronson Slope deposit at its 100% owned Iskut project in the Golden Triangle Area of northwestern British Columbia. These results are an intentional by-product of Porphyry Cu-Au exploration on the Bronson target, where drilling is focused on discovering the source of the gold and copper concentrations previously captured in a historical resource. The MRE incorporates drilling by previous operators and drilling by Seabridge since it purchased the project in 2016.

The resource estimation integrates 114 diamond drill holes, of which 25 were completed by Seabridge and the balance by previous operators. Assays from the drilling were subject to probability analysis and outliers were cut by lithological units and composited to 10x10x10 meter blocks. Based on an analysis of variography the block grades were estimated by multi-pass ordinary kriging.

The kriged block model was constrained within a conceptual open pit and classified by distance to drill hole data. The mineralization in the Bronson Slope resource sits in and around a multiphase quartz-magnetite breccia pipe. Within the breccia pipe, directly over and on the margins, medium to fine grained pyrite and chalcopyrite are found in veins and fractures with quartz and magnetite.

Further outboard and in the hanging wall sedimentary rocks to the breccia pipe, are intensely altered to quartz-sericite with abundant pyrite and subordinate chalcopyrite and localized sphalerite-galena concentrations. This pattern of alteration and sulfide mineralization is related to processes generated by an intrusion, and believe an intrusion in this environment will be a copper and gold-bearing porphyry system.