CONTROL OF THE ORE RESOURCES DISTRIBUTION IN THE EARTH CRUST BY GEOCHEMICAL PROPERTIES OF ELEMENTS AND ROCKS

Concept of geochemical properties of elements – their litho-, chalco- and siderophility was offered by V.M. Goldschmidt. In our information they are quantitative ratios of the elements contents for main natural systems: chondrites Ch and C1, basalts - b, clays – c. They reflects condition of their origin. Coefficient c/b reflects the degree of siality – femicity for elements, rocks and ores systems. It is increased in proportion to duration of their intracrust geochemical development. Both, coefficient C1/Ch as index of emanation mobility for elements and c/b reflected the position of their paragenetic association at any ore deposits. Minimal data of C1/Ch for elements characterise the root facies for their deposits but maximal – for apical ones.

We compilated geochemical map of the World on the tectonic base. At this map all the main terranes and more then 1000 largest ore deposits are geochemicaly identified as femic, femic-sialic ore sialic ones. The root, medium or apical facies are shown only for deposites. Comparison of all the information reveals the high degree of the statistical corresponding between composition of the substratum and subsystemes in their booth - geochemical type and the facies of the ore deposits. The geochemical zonality of elements distribution display that mainly of the World ore resources for elements with C1< Ch and peculiar femic (b>c) are characteristic for the oldest periods and roots facies (Ni,Pt,Fe,Mn,Co…) but sialic elements (c>b) with C1>Ch (Sb,Te,Ag,Mo,W,Sn,Pb…) are concentrated mainly at the youngest periods and apical facies. The results of the received geochemical information must be very helpful for the mineral prognoses activation.