The Perth-based miner has agreed to purchase 45 million shares of the Canadian junior at a price of $2.45 per share, or about 15% of Arizona Mining’s outstanding shares.
The firm, the world's largest primary silver producer and Mexico's second-largest gold miner, said output of the grey precious metal hit 13.5 million ounces in the quarter.
The miner had to put its plans on hold because the Police Service of Northern Ireland said it cannot secure daily anti-terrorism cover for its blasting operations at Omagh gold mine.
Exeter shareholders will receive 0.12 of a common share of Goldcorp for each they have in the junior — that's a premium of 67% based on the part's closing prices on the day prior to the announcement.