** Chinese gold producer Lingbao Gold Group 3330.HK jumps 10.7% to HK$18.68, highest since November 21
** Stock set for biggest one-day pct rise since October 2
** Australia's St Barbara SBM.AX said on Wednesday Lingbao Gold to buy 50% stake in its unit St Barbara Mining for A$370 million ($245.50 million) in cash
** Lingbao Gold says it will beneficially hold 50% + 1 share of equity interest in St Barbara Mining upon completion of deal
** Adds deal will help increase its resource base, strengthen its competitiveness in mining sector, expand its production scale
** St Barbara shares jump 9.4%
** YTD, Lingbao Gold surges 541.9%, SBM soars 147.8%
(Reporting by Donny Kwok)
((donny.kwok@thomsonreuters.com))