** Shares of Prospect Resources PSC.AX rise as much as
55.4% to A$0.115, their highest level since Aug. 25
** Australian miner's stock on track for best day since Feb.
7, if gains hold
** Co says significant lithium discovery at Step Aside
Lithium Project (Step Aside) in Zimbabwe
** Adds, potentially represents a feeder zone for the
defined spodumene mineralisation identified to the north during
the earlier drilling phases at Step Aside
** About 4.9 million shares change hands at 03:27 GMT, about
19.5 times the 30-day average
** Stock down ~38% this year, as of last close
(Reporting by Sherin Sunny in Bengaluru)