Feasibility Study and Technical Report - Pretivm

Given the intense folding displayed by the lower Hazelton Group rocks in this area, aswell as the variable competency of the rocks in this part of the Property, it is likely that acombination of ductile deformation and rock competency differences controlled theorientation of this zone. Way-up structures in steeply northeast dipping sedimentaryunits in the Shore Zone indicate that it likely forms the northern limb of a parasiticsoutheast plunging anticline. The aforementioned lineament likely utilized the ductiledeformation-prepared northwest-trending zone of structural weakness for propagationduring late brittle deformation.The veins and vein stockworks consist predominantly of quartz with minor carbonate andbarite, with patchy sulphide mineralization consisting of variable quantities of pyrite,tetrahedrite, sphalerite, galena, and arsenopyrite. Electrum has been observed in traceamounts. Silver is present in some of the highest concentrations observed in theProperty. This observation, together with the stratigraphic (up stratigraphy) and spatialposition (i.e. relatively far northeast of the Bridge Zone) of the Shore Zone, providesfurther evidence for thermal gradient-induced mineral zonation across the Property.7.3.3 STRUCTURE AND METAMORPHISMHazelton Group rocks and mineralized vein stockworks on the Property display significantmulti-phase post-mineralization deformation. The Brucejack is characterized by thepresence of steep structural elements, including steeply dipping planar features such asbedding, foliation, and brittle faults, and steeply plunging linear features, such as foldhinges, pencil cleavage, or mineral lineation. These structural elements are associatedwith the Late Jurassic to Late Cretaceous SFB deformation, and deform unaltered andaltered rocks, as well as mineralized veins and stockworks.FOLIATIONFoliation on the Property is pervasive, although it is best developed in the most intenselyaltered rocks. The foliation is defined by muscovite in altered rocks, and by sericite andchlorite in less altered rocks. The foliation displays a dominantly east-west trend acrossthe Property, with a sub-vertical dip that is generally to the north, but which does varyabout the vertical.Foliation orientation appears to be locally controlled by the presence of proximalcompetent rock masses that acted as strain resistors during deformation (e.g. therelatively competent hornblende feldspar phyric volcanic flow that forms the southernand south-western margin of the West Zone probably controlled the northwest trend ofthe foliation in this area).Within the broader zones of veining, individual veins, veinlets, and narrower stockworkzones have been partially to completely reoriented sub-parallel to the foliation in the hostrocks. The most intensely foliated rocks tend to be altered rocks immediately adjacent tothe veins and stockworks.A second, locally developed foliation has been observed in the footwall to West Zone,Gossan Hill, and Golden Marmot. The development of this foliation, which is also typicallyPretium Resources Inc. 7-32 1291990200-REP-R0012-02Feasibility Study and Technical Report on the BrucejackProject, Stewart, BC