Reuters reported that Mexican copper output suffered its biggest single-month fall in two years in October and was down 4.7%from the same month a year ago,as slowing global demand affected production.

According to data from INEGI,the national statistics institute,silver production rose to 368,787 kilograms in October,up 3.6%

Mr Gonzalo Fernandez,an analyst with Grupo Santander in Mexico City said that the fall in copper was caused by lower prices and slowing demand from major copper consumers like China.

He said that"Copper is very price sensitive.When prices are high,some mines produce a lot,and when it's low,those mines produce less."

He added that"There's been a slight deceleration in China,and a slight global deceleration,and that can be seen in global copper consumption."

Mr Fernandez nonetheless expects copper production to rebound when November and December output data is released.

Mexican copper production has mainly been positive this year,with output rising more than 40 percent in February.

Output plummeted during a three year long strike at Grupo Mexico's massive Buenavista mine that ended in 2010 after the company won a court battle against the mining union.