NEW YORK (TheStreet) -- Keegan Resources (KGN), Augusta Resource (AZC) and Seabridge Gold (SA) are among seven junior mining stocks that could see significant gains in the coming 12 months, according to analysts polled by Bloomberg.Global mining mergers and acquisitions saw a flurry of activity in the first two months of 2011, and a recent report by PricewaterhouseCoopers estimates that M&A activity will grow significantly this year. The report predicts that there will be plenty of takeovers in the junior mining space as developed countries seek to secure supply amid concerns of China's market concentration. Junior miners outperformed senior gold companies in 2010, with a 61% increase for the Junior Gold Miners Index compared with 30% for the Gold Miners Index. Analysts expect these seven junior mining stocks to generate lucrative returns for investors over the next 12 months. Based on analysts' price targets, these stocks have potential upside of 28% to 190%.