The autbors consider focus structures or structures of central type to be a variety of geodepression (diwa) structures.They are related to the matter-energy evolution of geosphers and control the distribution of useful minerals,including diamond.The authors also have separated out 39 spherical guophysical discontinuities from the bottom of the crust (40km) to the inner core. In the paper diamond deposits have been discussed for Russia,China and Korean Peninsula, and evalution of diamond content has been made for the south of the Far East.
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