Caption:
Chlorite alteration with disseminated chalcopyrite (09CQA-0142) at the past-producing Terra mine area, Camsell River district, Great Bear magmatic zone. Typical GBMZ surface exposures with no secondary iron oxide staining associated with sulphide mineralization, hence the importance of recognising alteration facies with common mineralization and other alteration facies such as K-felsite breccia proximal to mineralization.