• Shares of Kaiser Reef fall 5.9% to A$0.16, eyeing their weakest trading session since February 28, if current trends hold

• Gold miner to buy Henty mine in Tasmania from peer Catalyst Metals , latter said

• Transaction terms include upfront A$15 million ($9.44 million) among others

• Catalyst shares on trading halt

• More than 1.7 million shares change hands, 5.7 times the 30-day avg

• Stock up 4.7% YTD, including current session's moves
($1 = 1.5891 Australian dollars)

(Reporting by Nikita Maria Jino in Bengaluru)