The world's top copper producer said on Wednesday it was temporarily halting construction of all mining projects.

Study sheds new light on how chalcopyrite behaves when subject to leaching and provides a better understanding of the nature of the passivation layer.

The company has been reporting on the safety, environmental, social and economic issues in a comprehensive, standalone document since 2010.

The Chilean miner could own 70% of the Tanacross copper-gold project in Alaska, by spending $30 million on exploration over eight years.

Global slowdown is expected to see a slide and trigger a stimulus that could match the 4 trillion yuan package implemented after the 2008 financial crash.

The new company, known as NewRange Copper Nickel LLC, will share costs to develop two proposed copper and nickel mines.

Worries about demand in China and elsewhere due to a slowdown in growth were reinforced by rising inventories.