** Shares of Australia's Metal Hawk MHK.AX rise as much as 13.6% to A$0.50, marking their biggest intraday pct gain since April 10
** MHK currently up 11.4% at A$0.49, as of 0408 GMT
** The gold and base metals explorer gets approval under aboriginal heritage survey to conduct drilling program at Leinster South Project in Western Australia
** Co says earthworks for initial ~5,000m drilling program are scheduled to start imminently, and drilling will commence soon after
** Stock up 57.1% this year, including the session's gains
(Reporting by Shruti Agarwal in Bengaluru)
((Shruti.Agarwal@thomsonreuters.com;))