Jan 29 (Reuters) - Antipa Minerals Ltd AZY.AX :
* RIO TINTO EXPLORATION ELECTED TO PROCEED WITH NEXT STAGE OF ITS EARN- IN INTO CITADEL PROJECT
* ANTICIPATED THAT RIO TINTO WILL COMMIT TO EXPLORATION PROGRAMME IN EXCESS OF $2 MILLION IN 2020
* RIO TINTO CAN INCREASE INTEREST IN CITADEL JV TO 65% BY SOLE FUNDING ADDITIONAL $14 MILLION IN EXPLORATION EXPENDITURE
* UNDER SOME CONDITIONS, RIO CAN INCREASE INTEREST IN CITADEL JV TO 75% BY SOLE FUNDING A FURTHER $35 MILLION WITHIN A FURTHER 3 YRS