May 13 (Reuters) - Discovery Africa Ltd DAF.AX :
* Four of the Nachingwea Project tenements have been relinquished
* Prospecting licences were granted for four year terms and were due to expire during 2016
* Says company will also consider market interest and funding opportunities for the Nachingwea Graphite Project
* Source text for Eikon ID:nWNBS02GN1