Why have the COO and Chief Geo left in the past few weeks ?? Is...

Why have the COO and Chief Geo left in the past few weeks ?? Is there internal trouble at BOK.
Rise in gold price is good for BOK but given poor performance at Manuka Silver, are trailstone starting to get nervous ? and imposing there muscle re: Marda future plans. The trailstone deal was fantastic for BOK but was only going to remain good if the Company performed, so far jury is out.