** St Barbara SBM.AX soars as much as 21.8% to A$0.475, highest since October 28, 2024
** Stock marks biggest intraday pct gain since July 6, 2023
** Gold miner says Papua New Guinea government received required documents to approve extension of co's Simberi mining lease until 2038
** Co progressing talks with PNG officials to resolve tax issues, which were filed in 2024
** Adds mining lease extension can move forward once tax issue settled
** Around 19.4 mln shares traded, ~2.8x the 30-day avg
** YTD, SBM jumps 108.9%
(Reporting by Keshav Singh Chundawat in Bengaluru)
((Keshav.SinghChundawat@thomsonreuters.com))