In February 2009 a takeover offer by China Minmetals was recommenced for acceptance by Oz Mineral's board of directors.[4] The proposal was one of three high-profile moves by Chinese firms to acquire stakes in the Australian mineral sector in early 2009.
The China Minmetals offer along with other proposed purchases, especially the stake in Rio Tinto planned by Chinalco, caused great public furore, adding political pressure to block Minmetals.
In June 2009 China Minmetals' Australian assets were spun off to form MMG.[7][8] The Martabe gold project in Indonesia was sold to China Sci-Tech Holdings in the same month.[8][9]
In 2015, with its activities concentrated on the Prominent Hill mine and the nearby Carapateena prospect in South Australia, OZ Minerals moved its headquarters from Melbourne to Adelaide.[10][11] in 2016, OZ Minerals commenced construction of its Carapateena mine.[12]