North Mitchell Block

Throughout the Sulphurets Camp, both gold and Au-Cu deposits appear to be closely associated with Early Jurassic syn-volcanic structures that helped to focus mineralization at that time. During mid-Cretaceous time, however, these same structures were reactivated and generally inverted (i.e.. what were extensional structures become contractional structures) and therefore significant mid-Cretaceous faults and folds, such as the Sulphurets and Mitchell faults, and the VOK syncline, represent important clues to the location of mineralized zones, some of which may in fact be blind. One such possible structure is an inverted syn-volcanic Early Jurassic structure (a basin-bounding fault?) on the North Mitchell block, and whose present expression is as a southerly-verging large-scale anticline that is coincident with an abrupt change in thickness of Lower Jurassic flows and associated volcanic fragmental rocks, and which is cored by strongly altered underlying units. This structure represents a compelling blind target at depth and along strike to the ENE of surface exposures of the altered rocks.