MGX Resources (ASX:MGX) said Australia's Foreign Investment Review Board (FIRB) approved the acquisition of a 50% interest in the Central Tanami gold project joint venture in the Northern Territory from Northern Star Resources for AU$50 million, according to a Wednesday Australian bourse filing.

Tanami Gold (ASX:TAM), which holds the other 50% of the joint venture, waived its right of first refusal in August.

Completion of the deal now remains subject to the joint venture securing an extension of existing infrastructure arrangements on one tenement from the traditional owner representative body, the Central Land Council.