Geology & Mineralization
Regional Geologic Setting
The New Afton deposit comprises part of a larger copper-gold porphyry district situated within the prolific Quesnel Trough island-arc terrane, host to many of British Columbia’s major copper and gold districts. Pre-mineral country rocks consist of intermediate to mafic volcanic country rocks belonging to the Triassic Nicola Formation. Regional scale fault zones act as the principal controls to the emplacement of the batholithic rocks and related porphyry-style mineralization in the area. The bulk of the New Afton deposit occurs as a tabular, nearly vertical, southwest plunging body measuring at least 1.4 kilometres along strike by approximately 100 metres wide, with a down-plunge extent of over 1.5 kilometres. The deposit remains open to the west and at depth.
District Geologic Setting
Mineralization is characterized by copper sulphide veinlets and disseminations localized at brecciated margins between altered porphyry intrusives and Nicola volcanic country rocks. Copper occurs primarily as chalcopyrite and lesser bornite, with secondary chalcocite and native copper occurring in the upper nearer-surface parts of the deposit. Gold occurs as sub-micron grains associated with copper sulphides.
Since the commencement of commercial production in 1977, the New Afton mine has produced more than 800,000 ounces of gold and 850 million pounds of copper from both open pit and underground operations.
Block Cave Reserves & Mineral Resources – 3D View
Since the start of the current underground block cave operation in July 2012, exploration at New Afton has focused on extending the mineral resource below the current B-Zone block cave reserve. This work has resulted in the development of the C-Zone mineral resource which is currently the focus of a feasibility study. The C-Zone resource remains open to further growth both laterally and down plunge to the west.