Marathon Gold Corporation (T.MOZ) has completed the short column leaching test program to assess the heap leaching potential for both the Marathon and Leprechaun Deposits at the Valentine Gold Camp in central Newfoundland. The short column tests on samples crushed to minus half inch and minus three quarter inch have confirmed that rock containing 1.33 to 2.13 grams per tonne of gold is amenable to heap leaching technology.
The short column test program was completed by Thibault & Associates Inc. to confirm gold recoveries relative to time by the percolation of cyanide leach solution through crushed ore — typical of heap leaching operations. Gold extraction over 130 days as illustrated by Figure 1 is in the range of 50% to 70%. The gold extraction characteristics of the Marathon Deposit suggest that a finer crush to half inch may be required to improve on gold extraction. Extraction of gold based on 130 day short column tests is summarized as follows. read more