** Shares of Great Boulder Resources GBR.AX surged up to 10% to A$0.11, marking their sharpest intraday gain in three weeks
** Stock on track to notch a third straight day of gains
** Gold explorer says drilling has expanded mineralisation beyond the current resource, revealing gold between Mulga Bill, Mulga Bill East, and Eaglehawk deposits in Western Australia
** YTD, stock up 15.4%
(Reporting by Kumar Tanishk in Bengaluru)
((Tanishk.Kumar@thomsonreuters.com; X: @thatstanishk http://www.x.com/thatstanishk;))