Rio Tinto shares shed 10 percent on Monday after rival BHP Billiton failed to make a higher bid as rumored while takeover talk helped Xstrata buck a slide in the mining sector on weaker metals prices.

Rio Tinto

Rio shares shot up 4.9 percent on Friday on talk that BHP, the world's biggest mining group, would lift its proposed offer for Rio to 3.58 of its shares plus A$16.50.