MacPhersons okays Merrill Crowe plant and Nimbus expansion

THE BOURSE WHISPERER: The Board of MacPhersons Resources (ASX: MRP) has approved the new Merrill Crowe plant and introduced a gravity circuit to the proposed 480,000 tonnes per annum Nimbus Plant expansion at the company’s 100 per cent-owned Nimbus silver-gold-zinc project.

The company has produced  a stream of progressive drilling results highlighting new gold zones at Nimbus, which it considers to have demonstrated the requirement to bring forward the gravity gold/silver circuit to be ready at commissioning to recover free gold and silver.

MacPhersons anticipates the expansion of the plant circuit will allow for commissioning to occur in the first half of 2014.


New Nimbus 480,000tpa silver-gold-zinc plant expansion flowsheet. Source: Company announcement


A zinc/silver flotation circuit will also be added and will be ready for processing sulphide material earlier in the production schedule.

“An ongoing review of our mineral resource and the progressive drilling results has now shown that there will be an early component of gravity recoverable gold and silver from the Nimbus silver superpit,” MacPhersons Resources managing director Morrie Goodz said in the copany’s announcement to the Australian Securities Exchange.

“The earlier introduction of the gravity gold/silver plant and zinc/silver flotation circuits allows us to process ore from our additional gold assets at Boorara and Coolgardie immediately upon commissioning of the plant.

”This means the company will have an earlier diversification into silver, gold and zinc production in FH 2014.”

MacPhersons described the new plant design as larger and more flexible, allowing for early production from gold and zinc streams.

It will also allow for the co-treatment of ores from various sources, including the Boorara (located 2km west of the Nimbus mill) and Coolgardie gold projects.

MacPhersons believes the upgraded plant will be of significant benefit and will allow prompt processing of ore mined from the Nimbus silver superpit, as well as its gold resources.

In 2013, MacPhersons intends to shift its activity focus from exploration to production.

Upgrades to the JORC Classification of resources are ongoing.

The release of mineral resource statement along with the next pit optimisation study is planned for January 2013.