June 13 (Reuters) - Oz Minerals Ltd OZL.AX :
* OZ MINERALS HAS RECEIVED ACCEPTANCES AND ACCEPTANCE INSTRUCTIONS FOR 73.9% OF AVANCO SHARES
* OFFER PERIOD FOR AVANCO SHARES EXTENDED UNTIL 6 JULY 2018
* ANDREW COLE ASSUMING ROLE OF CHAIRMAN OF AVANCO BOARD
* TONY POLGLASE HAS STEPPED DOWN AS MANAGING DIRECTOR OF AVANCO