** Shares of lithium developer Lake Resources NL LKE.AX
climb as much as 7.1% to A$1.290, their highest since Aug. 17
** Co appoints David Dickson as its new chief executive
officer and managing director urn:newsml:reuters.com:*:nL4N30E0CU
** Dickson replaces Steve Promnitz, who oversaw co's
development for nearly six years before stepping down in a
surprise move in June
** LKE among the top gainers on benchmark index .AXJO
which is down about 1.3%
** As of last close, stock up 19.3% this year
(Reporting by Himanshi Akhand in Bengaluru)
((Himanshi.Akhand@thomsonreuters.com;))