SANTIAGO, Aug 08, 2011 (Dow Jones Commodities News via Comtex) -- The value of Chile's copper exports in July surged to $4.19 billion from $3.39 billion in the same month last year, the central bank said Monday.

The year-on-year increase is due to the higher copper prices on international markets. Chile is the world's largest copper mining country, producing a third of global supply.

In July, London spot copper prices averaged $4.36 a pound, up from $3.05 in the same month in 2010, according to state copper commission Cochilco's data.

Chile's overall mining exports, including molybdenum, iron, silver, iodine and lithium, increased to $4.64 billion in July from $3.76 billion the same month last year.

For January to July, the South American nation's copper exports were $26.34 billion, versus $21.46 billion in the same period last year. The country's overall mining exports for January-July totaled $29.39 billion compared with $23.59 billion for the same period last year.