** Shares of Newpeak Metals NPM.AX rise as much as 43.8% to A$0.023, their highest level since July 11

** Stock marks its biggest intraday pct rise since September 22

** The mineral explorer announces unit to acquire the remaining 49% of Las Opeñas Metals S.A. from Genesis Minerals (Argentina) S.A. for $500,000 cash

** Co to have complete ownership of the exploration permits within the Las Opeñas gold project in San Juan Province, Argentina after the transaction

** About 6.6 million shares change hands, 4.9 times the 30-day avg

** Stock is up 81.8% YTD, including the session's moves

(Reporting by Anjali Singh in Bengaluru)

((anjali.singh2@thomsonreuters.com;))