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¡¡¡¡According to the definition by State Reserve Commission at 1987£¬ a deposit with resources more than five times of a giant deposit can be called a super-giant deposit. In the same year£¬ the concept of "super-giant deposit" was formally proposed by the International Union of Geodesy and Geophysics £¨IUGG£©. As a matter of fact£¬ the famous economic geologist£¬ Prof. Peter Laznicka£¬ proposed earlier £¨in 1983£© that the element enrichment factor should be taken as the division standard£¬ that is£¬ a deposit with an enrichment factor of more than 1¡Á10£¨11£© times of the crust can be called a " giant deposit"£¬ and of more than 1¡Á10£¨12£© times be called a "super-giant deposit". Super-giant deposits are the results of a rather rare geological process in the crust£¬ witnessing the bizarre process for the extraordinarily large volume of mineral accumulation. It is not only the innovation source for metallogenic theory£¬ but also has a great impact on the development of world economy. The academic team led by Prof. Tu Guangchi has carried out systematic and in-depth studies on the geological characteristics£¬ formation environments£¬ and metallogenic conditions of super-giant deposits£¬ from 1980s to 1990s.