12:26 PM EST - Katanga Mining Ltd. : shares jumped about 10 percent in heavy activity on Wednesday after the tiny copper miner made moves to block a rival company from gobbling up its stock in a creeping takeover bid. Volume was a heavy 1.6 million shares. Katanga said on Tuesday that it was asking the Ontario Securities Commission to prohibit Central African Mining and Exploration Plc from buying its shares, arguing that CAMEC's actions ''have contravened Ontario's takeover provisions.'' Katanga Mining Ltd.
shares T.KAT are trading $1.16 at $16.96.
