BUZZ- Long Run Exploration Ltd: To be bought at high premium
** Canadian oil and gas company's shares more than double to C$0.37
** Company agrees to be acquired in an all-stock deal by a group of China-based investors for C$770 mln, including debt
** Offer of 52 Canadian cents per share represents a more than threefold premium to the stock's Friday close
** Up to Friday's close, stock had fallen 89 pct this year
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