** Marquee Resources MQR.AX soars as much as 27.3% to A$0.014; marks biggest intraday pct gain since August 14
** Stock hits its highest since August 15
** MQR up 18.2% so far this week; set for its best week since August 15
** Metals explorer confirms high-grade antimony find at Mt Clement Project in Western Australia
** About 38.7 mln shares traded, 8.6x the 30 day avg
** YTD, MQR falls 7.1%
(Reporting by Ananya Verma in Bengaluru)
((ananya.verma@thomsonreuters.com;))