** Octava Minerals OCT.AX slips 15% to A$0.034, lowest since July 17
** Rare earths explorer receives firm commitments to raise ~A$1.5 mln ($987,150) via placement
** Issue price of A$0.03 represents a 25% discount to last close
** Funds raised will be used for preliminary exploration as part of due diligence on the Federation Copper-Zinc-Silver Project in Western Tasmania, others
** About 1.1 mln shares traded, ~5x the 30-day average
** OCT loses 72.8% YTD
($1 = A$1.5195)
(Reporting by Sherin Sunny in Bengaluru)
((Sherin.Sunny@thomsonreuters.com))