GEOMORPHOLOGICAL CRITERIA OF THE RESEARCH AND THE SITUATION OF CRYSTALL-BEARING PLOTS ON THE ALDAN SHEET

Abstract

Morphometrical methods made it possible to establish a block structure of the Sheet. Crystall outcrops are primarily associated with the lowered block. Most of the crystall- bearing plots (78 per cent) by their altitude location come close to the ancient peneplain formed in the Precambrian. At that period there began the opening of crystall-bearing; plots. Cambrian deposits covered them and preserved for a long time against destruction. The most perspective are those plots which are inclined towards the peneplain surface or its relicts. An attempt os made to define the forms of relief quantitatively, which is needed for classifying the crystall-bearing areas into different types.