** Horizon Gold HRN.AX rises as much as 13.5% to A$0.420,
posts biggest intraday percentage gain since July 13
** Perth-based gold firm says drilling is underway at its
Gum Creek gold project in Western Australia urn:newsml:reuters.com:*:nASX8jpQcs
** Gum Creek has historically produced more than 1 mln
ounces of gold and hosts a current mineral resource of 1.39 mln
ounces - HRN
** Shares at a one-week high
** Stock has risen 87.6% this year, as of last close
(Reporting by Yamini C S in Bengaluru)
((Yamini.CS@thomsonreuters.com;))