Located just 70km from Perth, Keysbrook is expected to be one of the largest producing leucoxene mines in the world.

The $A54.6 million lump sum turn-key contract will see GR design and construct a wet concentrator plant and associated infrastructure at the Keysbrook site, as well as perform upgrades on an existing mineral sands plant owned by Doral.

GR was awarded preferred contractor status for the project in October.

MZI chief executive Trevor Matthews said the signing was a significant step in the project’s development.

“We have a good relationship with GR Engineering and their appointment reflects the confidence we have in their ability to construct the project,” he said.

“Signing the construction contract is one of the final activities prior to starting project development and we look forward to commencing soon.”

GR managing director Geoff Jones said the company had a good understanding of what was required at the site.

“The ability to complete early works has provided us with a detailed understanding of the project and the requirements of its stakeholders,” he said.

“We look forward to continuing to work collaboratively with MZI to deliver safe, successful project outcomes.”

Work will commence at the site once contract conditions are satisfied. GR expects to receive a commencement date before the end of the year.

MZI resources were steady this morning at A0.8c, with GR Engineering shares also steady at 74.5c.