The state of emergency, which begins Monday, will last for 60 days in the provinces of Cajamarca, Celendín, Hualgayoc and Contumazá.
Humala said the government "has exhausted all paths to establish dialogue as a point of departure to resolve the conflict democratically" and blamed the intransigence of a sector of local and regional leaders.
President Ollanta Humala said Sunday night that protest leaders had shown no interest in reaching agreement after a day of talks with Cabinet chief Salmon Lerner and three other ministers.
“The intransigence of a group of local leaders was once again made clear,” Humala said yesterday in a speech broadcast nationally on radio and television. Talks “have not succeeded in achieving even minimal accords to allow the return of social peace and the restoration of public services.”
Cajamarca has been the scene of a general strike for the past 11 days in opposition to the mega-scale Conga mining project that residents say threatens local water resources.
Peru, the world’s third-largest copper miner and the sixth- largest gold producer, has lined up $50 billion in mining investment projects over the next decade. Minas Conga seeks to produce 680,000 ounces of gold and 107 million kilograms of copper annually.