IRONORE/ Sector majors BHP Group BHP.AX and Rio Tinto RIO.AX gained 2.6% and 2.4%, respectively. July 25 (Reuters) - Australian shares advanced on Tuesday, led by miners and energy stocks, although investors exercised caution ahead of local quarterly inflation data and the U.S. Federal Reserve's policy meeting, both due on Wednesday. .N In Sydney, heavyweight miners .AXMM led the gains with a 2.1% jump, after China on Monday announced more plans to revive its flagging economy, although Singapore iron ore futures dipped slightly.