Thomson ReutersFebruary 28, 2013 09:15
* Names Simon Heale as chairman, Andrew Southam as CFO
* Gross costs forecast 8-12 percent higher in 2013
* 2012 core profit excluding ENRC down 30 percent
* Shares down more than 5 percent
By Clara Ferreira-Marques
LONDON, Feb 28 (Reuters) - The prospect of sharply higher costs and spending at copper miner Kazakhmys battered its shares on Thursday, after the company reported a drop in annual profit and warned it would take a hit on its stake in Kazakh rival ENRC.