SANTIAGO, July 28 World no.1 copper miner Codelco halted operations Tuesday at its key Chuquicamata mine as a week-long contract workers' strike intensified, chief executive Nelson Pizarro said.
Take context from the input text and decide on the accurate relationship between 'Chuquicamata' and 'Codelco' from the options provided.
Options: location of formation, publisher, operator, parent organization