Brenda

BRENDA (EN: Brenda; RU: Бренда) is the copper-porphyric deposit within Canada, within the British Columbia province, at the distance of 22 kilometres to the north-west of the Peachland city. It has been discovered during the 1947, and is operated since the 1969. The mineralization is confined to the western edge of the stock of the Jurassic granodiorites, which are breaching the Upper Triassic sedimentary and volcanogenic rocks. The industrial venulous ores are embedded as the zone of the near-meridional strike; its length is 780 metres, width is 450 metres, depth is 270 metres. The main ore minerals are chalcopyrite, molybdenite. The reserves of the ore (proven and probable) are more than 128 million tonnes, with the content of Cu of 0.14%, and of Mo of 0.03% (1981). The deposit is being developed by the opencast method. The extraction of the ore is 8.4 million tonnes (1976). There are extracted by flotation into concentrates 91% of Cu and 82% of Mo. The production (1980) of the molybdenum concentrate is 2.27 thousand tonnes (55.6% of Mo). There is performed the export into the countries of Europe, of South America, and into Japan.