Minera Los Pelambres continues to place its trust in Siemens: Gearless mill drives increase processing capacity for copper ore

The new 36-month agreement with the workers from company's projects unit affects some 620 employees.

Los Azules is due to receive a key environmental permit in four to six weeks, the company said.

The company said the underlying geology of its Yukon land package is prospective for several critical minerals, including copper, molybdenum, tungsten, antimony and bismuth.

The pact will focus on transit of minerals such as coal and copper, Reuters sources say.