July 10 (Reuters) - Zijin Mining Group Co Ltd 601899.SS : * REFERS TO SPECIAL MINING LEASE OF PORGERA GOLD MINE IN PAPUA NEW GUINEA * BARRICK (NIUGINI) LTD INITIATED CONCILIATION PROCEEDINGS BEFORE INTERNATIONAL CENTRE FOR SETTLEMENT OF INVESTMENT DISPUTES * PROCEEDINGS TO SETTLE ITS DISPUTE WITH PNG ARISING OUT OF PNG'S DECISION NOT TO EXTEND PORGERA SPECIAL MINING LEASE