Brazil steelmaker Usiminas plans steel price hike in Q3

The Toronto-based company said the bid of 48 cents per share in cash represents a 37% premium at the close of Petaquilla's trading on the Toronto Stock Exchange.

Instead of the lauded $6 billion in mining invested forecasted for 2013 earlier this year, SNMPE says the country’s sector will attract about $4 billion.

Vale has teamed up with the University of São Paulo to identify bacteria and fungi capable of eating copper in a move which could generate an additional $1.4 billion in gross revenue for the Brazilian mining giant.

An alleged unit from the Revolutionary Armed Forces of Colombia, or FARC, blew up Tuesday heavy equipment at the Colombian coal mine Cerrejon, in the northern province of La Guajira, part owned by BHP Billiton.

Over $1 million has lost Bolivia so far due to the conflict over rights at the silver, tin and zinc mine that used to belong to commodity trader Glencore (LON:GLEN), but that President Evo Morales nationalized last June.

Canadian explorer Mariana Resources (LON:MARL, TSX:MRY) said the latest set of drilling results from the Calandria Sur deposit in Argentina were “good” with 13 of 21 holes returning “significant intersections” of gold and silver.

The company says it expects construction costs to be about $158 million for the project and that commercial production will begin in the second half of 2014.

Canadian Baja Mining (TSX:BAJ) shareholders continue to be anxious about the future of the company’s flagship Boleo project in Mexico, as its South Korean partners were unable to decide on the second stage of financing for the copper-cobalt-zinc mine development, the miner said Tuesday.

Chilean state-own Codelco, the world's largest copper producer, began construction of the access tunnels to the new level of its El Teniente copper mine on Tuesday.