** Shares of Australia-based specialty miner Oceana Metals OCN.AX rise as much as 57% to a record high of $0.685
** Company enters a deal to acquire 100% of the Serra Negra
rare-earths project in Minas Gerais state, Brazil
** Will pay total upfront and deferred consideration of up to $10.3 million in cash and shares, plus 2.5% net smelter royalty
** Company receives firm commitments for a A$20 million($14.38 million) share placement
** Including sessions' gains, stock up nearly three-fold, YTD
($1 = 1.3912 Australian dollars)
(Reporting by Sruthi Narasimha Chari in Bengaluru)
((Sruthinarasimha.chari@thomsonreuters.com))