On the possibility to find diamond-bearing solid rocks in the Leningrad region

Abstract

Structural-geomorphological works carried out with view to forecast mineral deposits suggest the Lembolov morphostructure (Karelian Isthmus) to be promising for search for diamonds in solid rocks. The morphostructure is located within an area complicated in geological structure, at a node of deep-seated faults which delimit earthorust blocks different in characteristics. The Lembolov morphostructure was formed as an elevation during the post-Cambrian time (probably in the Lower Paleozoic) , when molten magma penetrated the earthcrust. The present appearance of the morphostructure is due to denudation and glacial deposition processes.