Workers at Codelco’s Chuquicamata mine to vote on strike action

City broker UBS says global mining firm BHP Billiton's (LON:BLT) June production figures were slightly better than expected and gives the stock an unchanged 12 month rating of a 'buy' with a target price of £28.40. The mining giant released the figures yesterday across the spectrum of its resources, including iron ore production up 14 percent year-on-year in the final quarter.

PT Freeport Indonesia (PTFI) Geo Services Division recently enhanced the slope monitoring system at Grasberg mine with the purchase of two IBIS-M radars. “Grasberg mine is one of the few mines in the world that utilises very high-technology monitoring equipment to help detect slope movements. The IBIS-M radars are top-of-the-line radars, using technology that is accurate to within approximately 0.1 mm, with coverage at some 2 km an area around 5 km square, and operating range of 10 m to 4,000 m,” explained PTFI Superintendent - Geotechnical Pit Engineering and Stability Rahadian Widiadi.

Harmony Gold Mining upgraded the resource estimate for its Wafi-Golpu project in Papua New Guinea on Wednesday increasing it by 57% to over 1 billion metric tons, making it one of the highest grade copper-gold porphyry systems in South East Asia. CEO Graham Briggs said it was a "game-changing asset" for the company and the latest drilling results bring the Wafi-Golpu deposits within sight of Freeport-McMoran’s Grasberg mine across the border in West Papua, Indonesia, which was recently hit by strikes.

Curis Resources Ltd. (TSX: CUV) ("Curis" or the "Company") reports a formal update on activities at the Company's flagship advanced stage Florence Copper project in central Arizona, USA.

BHP Billiton Ltd says it achieved production records in four commodities in 2010/11, with production of iron ore posting its 11th consecutive record. BHP said annual production of iron ore was 134.406 million tonnes (MT), up eight per cent on 2009/10.

Copper hit its highest since mid-April on Tuesday on better-than-expected U.S. housing data, a weaker dollar and hopes Chinese demand will remain firm, helping offset investor anxiety over U.S. and European sovereign debt concerns.

Outotec has been awarded another concentrator contract with Russian Copper Co. for the Miheevsky project with throughput of 18 million tonnes of ore a year. Finnish headquartered metallurgical specialist Outotec has signed a contract with ZAO Miheevsky Image from Outotec shows Kittilä gold mine, Finland.

Copper hit its highest since mid-April on Tuesday as a weaker dollar and hopes Chinese demand will remain firm helped offset investor anxiety over US and European sovereign debt concerns. Three-month copper on the London Metal Exchange (LME) traded at $9,800.25 a tonne by 0825 GMT compared with Monday's close of $9,694 a tonne.

Copper and gold miner OZ Minerals will return up to $200 million to shareholders through an on-market buyback, as booming prices for its products continue to generate cash. Photo of copper concentrates being loaded, by OZ Minerals.