Ariana Resources PLC (LON:AAU) said it has revised its agreement with KEFI Minerals (LON:KEFI) and its subsidiary Dogu concerning the net smelter return (NSR) on the Kizilcukur project and an exploration database encompassing the Republic of Turkey. “Following the final due diligence completed on Dogu, Ariana and KEFI determined to proceed with the proposed transaction on slightly revised terms,” explained …