Riotinto had been hoping to grab Glencore’s 44pc share in the Collahuasi copper mine in Chile - Vismedia A proposed £190bn mega-merger between mining giants Rio Tinto and Glencore has collapsed after both sides failed to agree on a price. Rio Tinto, the world’s largest mining company, on Thursday said it would abandon its pursuit of the Swiss-headquartered firm after talks to create a company nicknamed “GlenTinto” by analysts ended in failure. In a brief statement, Rio Tinto said it “could not reach an ...