SYDNEY, June 25 -- Chinese copper producer Zijin Mining <2899.HK> <601899.SS has terminated its A$545 million takeover offer for Australia's Indophil Resources <IRN.AX>.

As a result, Indophil said it was exploring other options regarding its 37.5 percent stake in the undeveloped Tampakan copper and gold mine project in the Philippines controlled by Xstrata <XTA.L>.

The mine is slated to start in 2016 but is under threat from a ban on open pit mining in South Cotabato province over environmental concerns.