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Excelsior production woes add up 

Canada-based Excelsior’s Gunnison copper project in south-eastern Arizona in the US is going to need to undergo a “long period of pre-production”, which is set to drive up costs.

Excelsior production woes add up  Excelsior production woes add up  Excelsior production woes add up  Excelsior production woes add up  Excelsior production woes add up 

"Production challenges have highlighted the need to re-engineer wellfield ramp-up, including the introduction of a long period of pre-production COflushing and calcite removal," president and

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