Tri Origin has evaluated the potential to retreat in excess of 10 million tonnes of tailings that were deposited in three dams at Woodlawn,
With the aim of demonstrating the feasibility of the tailings retreatment operation, the stand alone Woodlawn Retreatment Project feasibility study was completed in early July 2008.
Before taking a final development decision, the Company will incorporate into the study:
· An incremental Resource of 3.1 Mt of tailings (i.e. an increase of 36%) planned for recovery from the North, South and West Tailings Dams. Metallurgical test work is in process to confirm the expectation that the metallurgy of the material contained in the North Tailings Dam is consistent with tailings from the South and West Tailings Dams.
· Results from a technical peer review process that will be undertaken to ensure optimum outcomes in terms of engineering, procurement and contracting strategy.
· Results of discussions with potential off-takers of zinc, copper, and lead concentrates to firm up the potential marketing arrangements.
· Results of review of alternative funding strategies and the selection of a preferred funding strategy.
|TAILINGS DAM SOUTH||Grade||Metal Content|
|TAILINGS DAM WEST||Grade||Metal Content|
|TAILINGS DAM NORTH||Grade||Metal Content|
It should be noted that a proportion of the tailings contained in the South and North Tailings Dams is currently located under acidic water precluding drill rig access to these areas which makes accurate volumetric calculations challenging, hence the significant proportion of the Resource which has been classified as Inferred. Once full access to the tailings has been obtained and drilling completed, it is expected that the Inferred Resource estimates will be upgraded to Indicated and or Measured Resource status.