Demand for water by the resources industry and prolonged dry spells contribute to mass tree deaths in WA's mining heartland, traditional owners say.

Rio Tinto and its partners in the Robe River iron ore joint venture have offered A$75 million cash for CZR Resources' 85% stake in the undeveloped Robe Mesa deposit. Mark Creasy owns the other 15%.

Gold Valley Iron Ore has launched an on-market takeover bid to acquire CZR Resources, rivalling the bid Fenix Resources made in late February.

Western Australia's Environmental Protection Authority has opened a proposal for CZR Resources' Robe Mesa iron ore project ...