** St Barbara SBM.AX soars as much as 4.8% to A$0.493, its highest level since late October 2024
** Shares set to gain more than 20% this week, which would be its most weekly gain since early August
** The gold miner on Tuesday said its talks with Papua New Guinea government officials to resolve tax issues were progressing
** Said, mining lease extension can move forward on resolving tax issue
** YTD, shares up 116.7%
(Reporting by Nichiket Sunil in Bengaluru)
((nichiket.sunil@thomsonreuters.com))