PLACERS OF MAJOR VALLEYS IN THE LENA GOLD-PLACERS REGION

Abstract

The morphology and inner structure of the placers in the maj or valleys of the Lena gold-bearing area are considered. The morphology of placers in the plan and the distribution of gold within the contours of the valleys are determined by the morphodynamic type of the channels and their evolution in different parts of the valley. The influence of the major tributaries on the placers structure is found out. They determine the presence of the gold-bearing formations, transverse to the axis of the valley, as well as the abrupt changes of the elevation values of the bottom of the metal-bearing layers, which are located on the outcrops of different height levels and in the erosion hollows - paleochannels of the tributaries. Taking these facts into account allow predicting the position and morphology of the gold formations in buried valleys, to identify undiscovered fragments of placers and to increase the accuracy of delimitation blocks for the estimation of the gold reserves.

Keywords

• россыпь
• долина
• морфодинамический тип русла
• золотоносный пласт
• эволюция палеорусла
• притоки
• разведка