** Australian mining stocks .AXMM jump as much as 3.7%,
set to mark biggest gain since Nov 14, if gains hold
** Shares track iron ore futures higher as China's latest
pledge to step up policy support for its flagging economy lifted
sentiment IRONORE/
** Heavyweight Rio Tinto RIO.AX jumps 3.5% to gain most
since Dec 5
** World's largest listed miner BHP Group BHP.AX advances
3.9% and is on track for biggest pct gain in 8 months
** Sayona Mining SYA.AX and Pilbara Minerals PLS.AX add
5% and 5.1% each
** The sub-index hits highest level since July 17
** Stock up 0.5% this year, as of last close
(Reporting by Poonam Behura in Bengaluru)
((Poonam.Behura@thomsonreuters.com;))