By Cecilia Jamasmie Ghanaian authorities have approved a $185-million partnership between South Africa’s Gold Fields (JSE, NYSE: GFI) and Canada’s Asanko Gold (TSX: AKG) aimed at developing one of the West African country’s newest gold mine. The Ghanaian Minister of Lands and Natural Resources’ approval, said the companies, was the main hurdle they needed to clear to complete the previously announced joint venture deal. That transaction will see Gold Fields acquiring a 50% interest in the Vancouver-based company’s 90%-ownership of Asanko Gold Mine (AGM).