Things may have changed legislatively since the original joint...

Things may have changed legislatively since the original joint venture was proposed, but i'm pretty sure that Ansteel cannot buy out GBG's interest unless the FIRB approves it. And theres next to zero chance of that happening in the foreseeable future - especially given the current climate of chinese entities that have links with their govt.

There was a reason that Ansteel went into a 50/50 joint venture at Karara with GBG...because the development wouldnt have got the green light if they went it alone.