** Australia's Horizon Minerals HRZ.AX falls as much as 8.2% to A$0.045, its lowest level since February 4
** Stock last down 2% at A$0.048
** Gold miner says it plans to raise near A$30 million ($19.55 million) via placement at an issue price of A$0.043 per share
** Issue price at a discount of 12.2% to stock's last close
** Funds from placement to be used for studies at co's Black Swan processing plant
** Shares are up 22.5% YTD, including the session's losses
($1 = 1.5344 Australian dollars)
(Reporting by Anjali Singh in Bengaluru)
((Anjali.Singh2@thomsonreuters.com;))