A process in which a combination of three bacteria are used to break down the sulphide mineral matrix in the ore being treated, thus freeing occluded gold for subsequent cyanidation. The bacteria attach themselves to the metal sulphide surfaces in the ore, resulting in the accelerated oxidation of the sulphides. During the bacterial oxidation proce [..]

A method of recovering gold and silver, in which a slurry of gold/silver-bearing ore, carbon, and cyanide are mixed together. The cyanide dissolves the gold, which is subsequently absorbed by the activated carbon whose base is usually ground coconut shells. Carbon in pulp (CIP)

Breaking of ore from the size delivered from the mine into smaller and more uniform fragments to be then fed to grinding mills or to a leach pad. Doré

Core: a drilling method that uses a rotating barrel and an annular-shaped, diamond impregnated rock-cutting bit to produce cylindrical rock cores and lift such cores to the surface, where they may be collected, examined and assayed. Reverse circulation: a drilling method that uses a rotating cutting bit within a double-walled drill pipe and produce [..]

The amount of metal in each tonne of ore, expressed as troy ounces per tonne or grams per tonne for precious metals and as a percentage for most other metals. Grinding (milling)

Gram per tonne. Indicated resource

That part of a resource for which tonnage, grade and content can be estimated with a low level of confidence. It is inferred from geological evidence and assumed but not verified geological and/or grade continuity. It is based on information gathered through appropriate techniques from locations such as outcrops, trenches, pits, workings and drill [..]

Thousand tonnes. Measured resource

grams x 31.10348 = troy ounces; grams per tonne x 34.28600 = troy ounces per short ton; tonnes x 0.00045 = pounds; tonnes x 0.90718 = tons; metres x 0.30480 = feet; kilometres x 1.60930 = miles; hectares x 0.40468 = acres; Fahrenheit (F-32) x 5/9 = Celsius Mill

Million ounces. Mt