Located on the Sumatra Island, Indonesia, the Martabe plant consists of crushing, grinding, leaching/CIL, carbon regeneration, cyanide detoxification, tailings storage facility and water polishing to produce a gold/silver product.
The plant throughput is 4.5 Mt/y (563 t/h) of ore at a nominal life of mine grade of 1.9 g/t gold and 25 g/t silver, producing 206 000 oz/a of gold and 1 990 000 oz/a of silver. The plant was designed with provision for a future upgrade to 6.6 Mt/y.
Ausenco’s scope covered the EPCM of the 4.5 Mt/y gold/silver plant and associated infrastructure, including the water polishing plant, air services, earthworks, drainage and the accommodation camp.
On September 24th 2011 the Chairman of G Resources presented Ausenco with an award for achieving 1,000,000 manhours LTI free on the project. This achievement demonstrates Ausenco’s ability to work safely and effectively under challenging conditions.