Oct 4 (Reuters) - Great Boulder Resources Ltd GBR.AX
* ENTERED INTO AGREEMENT WITH AUSGOLD LTD TO FORM A JV OVER AUSGOLD'S YAMARNA NICKEL PROJECT IN WA
* TO EARN UP TO 75% OF YAMARNA NICKEL PROJECT BY ISSUE OF 1.5M SHARES TO AUSGOLD & SPENDING $500,000 ON EXPLORATION OVER 4 YEARS