June 12 (Reuters) - Zijin Mining Group Co Ltd :
* SAYS IT PLANS TO ISSUE A-SHARE CONVERTIBLE BONDS WORTH UP TO 6.0 BILLION YUAN ($847.89 million) TO FUND PROJECTS
* SAYS IT SIGNS AGREEMENT TO BUY GUYANA GOLDFIELDS INC FOR ABOUT C$323 MILLION ($238.29 million) VIA CO'S CANADA UNIT