ORE-GEOCHEMICAL ZONALITY OF THE MARGINAL SUTURE OF THE SIBERIAN PLATFORM

Abstract

The metallogenic zonality of the transformed Vendian-Riphean paleoshelf along the passive margin in the south of the Siberian platform is represented by the following ore-geochemical sequence: Cu, Fe, Pb, Zn, Au (Sb, W), Sn, and W. The ore-geochemical sequence was formed synchronously with the rejuvenation stages that were developed in deep-seated zones of the granitic-metamorphic layer along the marginal suture of the craton. The P-T conditions of ore formation at deposits of this sequence correspond to a regressive metamorphic trend. The formation of stratiform Fe-hydromica-hematite metasomatites was related to the interaction of deep-seated solutions generated in the crystalline basement, with a slightly metamorphosed Vendian-Riphean sedimentary sequence. The zonality was related to a recycling in the upper part of the granite-metamorphic layer of the continental crust.