** Shares of Barton Gold BGD.AX rise as much as 6.1% to
A$0.260, posting their biggest intraday percentage gain since
Nov 23
** Stock hits its highest level since Dec 4
** The gold explorer reports an increase in mineral resource
estimate at its Tunkillia project in South Australia
** Says drilling has added ~224,000 oz gold to estimates for
project, representing a 20% increase
** Stock up 22.5% YTD, based on last close
(Reporting by Aaditya Govind Rao in Bengaluru)
((Aaditya.govindrao@thomsonreuters.com;))