Africa's second largest producer of Metals, Gold Fields Ltd.'s plan to move to a 6 day week for workers in order to increase the productivity has been criticised by Royal Bank of Canada, who believes that it will only amount to increase the fatigue in the workers, hence negatively affecting the productivity.

The world's No. 4 gold producer, Gold Fields, recently specified that in order to profit from its mineral resource in Mali, it would buy Dublin-based exploration company Glencar for 28 million pounds ($46.29 million).

The offer is subject to approval by a minimum 80% of Glencar's shareholders.

On Friday, Gold Fields said that once the offer is accepted, every Glencar shareholder would get 9 pence sterling for every share in the company.