Xstrata plc said its copper production fell about 18% year-on-year in excess of the January-April quarter, though coal generation rose 9% and zinc output remained approximately continuous.
The company, that is presently negotiating a US$90 billion merger with commodities trader Glencore Worldwide plc, explained the autumn in copper output was the result of a transitional period of time in between mine closure and ramps ups, and had also been influenced by bad weather in South America.
Overall copper generation was 171,121t, down from 209,935t within the exact period of time very last calendar year, with respective decreases of 34% and 53% for the Tintaya and Collahuasi mines in Peru and Chile.
Xtsrata mentioned a one.8Mt year-on-year increase in quarterly coal output was attributable to enhanced weather conditions at its Australia and South Africa operations - very last calendar year cyclones and flooding hampered creation for mining companies in just about every place.
Copper manufacturing was anticipated to raise in the 2nd half of your year, as mining at Collahuasi moves into bigger quality zones and expansion jobs are ramped up on the Antamina, Antapaccay, Ernest Henry and Lomas Bayas mines.