95% Gold Recoveries From Metallurgical Tests Montagne d'Or Gold Deposit

VANCOUVER, BC - Columbus Gold Corporation reported the results of comprehensive metallurgical test work from Columbus Gold's 100 % controlled Montagne d'Or Gold Deposit, Paul Isnard Project, in French Guiana.

Three gold recovery process options were investigated on master composites: 1) whole-ore cyanidation, 2) a combination of gravity concentration followed by cyanidation of gravity tailing, and 3) gravity concentration followed by gold flotation from the gravity tailing. The test work indicates that the ore types of the principal Upper Felsic Zone (UFZ) and subsidiary Lower Favorable Zone (LFZ) are highly amenable to the three metallurgical processes tested, with recoveries of gold ranging from 95% to 97%.

The metallurgical tests were performed on two master composites prepared from 3.3 tonnes of whole core intervals from the UFZ and the LFZ. Triplicate fire assays for gold and silver showed that the UFZ master composite averaged 1.50 g/t Au and 3.33 g/t Ag and the LFZ composite averaged 1.56 g/t Au and 4.67 g/t Ag.

Pending metallurgical test results include additional flotation studies to evaluate the extent to which the flotation concentrates can be upgraded. In addition, confirmatory test work is being performed on ten variability composites under optimized test conditions to evaluate impact of spatial and grade variations throughout the deposit.