SANTIAGO, July 23 (Reuters) - Chile's mining minister

and the chairman of the world's biggest copper producer,

Codelco, said on Wednesday they have not yet received details on

50% copper tariffs due to be imposed by the United States on

August 1.

"At this point, we're all waiting," Maximo Pacheco, chairman

of state-run Codelco, told Reuters. He added that the upcoming

tariffs had influenced record U.S. copper prices, and that

global economic uncertainty was causing price volatility.

Chile, the world's biggest supplier of the red metal, is

also the top importer of copper cathodes to the United States.