July 27 (Reuters) - Orvana Minerals Corp
* Orvana announces $ 12.5 million prepayment financing with Samsung C&T
* Will sell gold doré from its El Valle mine in Spain and copper concentrate from its Don Mario mine in Bolivia to Samsung C&T
* Orvana minerals says obligations to Samsung C&T under facility are secured by pledge of all of Orvana’s shares of its unit Orovalle Minerals S.L.U.
* Will sell gold doré from mine in Spain,copper concentrate from mine in Bolivia to Samsung C&T, on exclusive basis for 30 months Source text for Eikon: Further company coverage: