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Canada miner Goldcorp 1st-qtr earnings double as costs fall

April 26 (Reuters) - Canadian gold miner Goldcorp Inc , the world's fourth-biggest gold producer by market value, posted higher first-quarter earnings on Wednesday helped by lower costs.

Goldcorp reported net earnings of $170 million, or 20 cents a share, in the three months through the end of March. That compared with earnings of $80 million, or 10 cents per share, a year earlier. (Reporting by Nicole Mordant in Vancouver)