South Perth-based energy company Aviva Corporation Ltd will spend around $650,000 to acquire a 90 per cent joint venture interest in Botswana-based Mawana Minerals Ltd's Mmamantswe Coal Project, the company announced today.

South Perth-based energy company Aviva Corporation Ltd will spend around $650,000 to acquire a 90 per cent joint venture interest in Botswana-based Mawana Minerals Ltd's Mmamantswe Coal Project, the company announced today.