Since 1859, the central Quesnel belt region of interior British Columbia has been the site of significant placer gold production. The identification of bedrock source areas for the placer gold and definition of the various mineral deposit types in this region are the main objectives of this field study. The study describes the regional geology, the geology of the central Quesnel belt (sedimentary units, volcanic successions, overlap units, continental clastic and volcanic deposits, intrusive suites), the region's geochronology and palaeontology, geochemistry, geologic structure, and metamorphism. It concludes with a section on economic geology of the region, discussing lode deposits, placer gold deposits, and regional geochemical studies.