** Sunrise Energy Metals SRL.AX plunges as much as 38.7% to A$0.435, lowest since April 11
** Diversified miner plans to raise A$6 mln ($3.8 mln) via placement at issue price of A$0.30, ~58% discount to last close
** Announces share purchase plan to raise additional A$1.5 mln, with same terms as the placement
** Funds to help co's drilling campaign at Syerston Scandium deposit in New South Wales
** Stock more than triples YTD
($1 = A$1.5613)
(Reporting by Roshan Thomas in Bengaluru)
((Roshan.Thomas@thomsonreuters.com))