|Title||Investigation of a complex copper-molybdenum ore from the Berg Property of Kennco Explorations (Western) Limited, British Columbia|
|Download||Not digitized. Availability |
|Author||Mathieu, G I; Bruce, R W|
|Source||Canada Mines Branch, Investigation Report IR 69-14, 1969, 26 pages, https://doi.org/10.4095/323904 Open Access|
|Publisher||Canada Department of Energy, Mines and Resources|
|Media||paper; on-line; digital|
|Released||1969 01 01|
The ore sample received contained 0.085% MoS?, 0.50% Cu and 0.23 oz Ag/ton. The molybdenum-bearing mineral was molybdenite occurring as flakes of less than 60 microns in length and
20 microns in width. Copper was present largely as chalcopyrite, with minor amounts of digenite, tennantite, malachite and azurite. The chalcopyrite grains varied in size from 2 to 150 microns. Some of these are disseminated in pyrite, the principal
metallic constituent. No silver minerals were found in the microscopic examination of the ore. In a test incorporating the best features developed for processing the ore, separate molybdenite and copper concentrates of marketable grade were produced.
These assayed 88.3% MoS? and 20.7% Cu but the recoveries were only 62.3% and 52.9% for molybdenite and copper, respectively, notwithstanding corresponding tailing losses of 11.1% and 23.7%. Part of the molybdenite and cop. per tied up in the cleaner
tailings is likely to be recovered in plant operation by recirculation of these products.