** Shares of Astral Resources NL AAR.AX rise as much as 10.2% to A$0.270, their highest level since February 17, 2011
** Also marks biggest intraday gain since September 18
** Logs third consecutive session of gains
** Miner finds broad zones of high-grade gold mineralisation at Mandilla Gold project in Western Australia
** About 10.7 mln shares traded so far, 2.2x 30-day average
** YTD, stock up 100%, including current session's move
(Reporting by Ananya Verma in Bengaluru)
((ananya.verma@thomsonreuters.com;))