ISTANBUL--November 7, 2012--Researched by Industrial Info Resources (Sugar Land, Texas)--The economic crisis in the eurozone, a gloomy outlook for the world economy, and decreasing investment sentiment have resulted in an evaporation of mergers and acquisitions (M&A) in the metals and mining sector . According to a global M&A report from consultancy firm Ernst & Young, the number of deals completed in first nine months of this year dropped 16% to 684. The total sum of all those deals dropped 43% to $76.8 billion, with an average deal size of $112 million.