Magmatic Telescoping as a Reflection of the Shift in Geodynamic Circumstances and Patterns of Formation of Gold Ore Manifestations

The presented work is the result of the study and the analysis of the distribution of ore manifestations and geochemical fields of gold and magmatic complexes of the Late Mesozoic in the framing of the Eastern flank of the Mongol-Okhotsk orogenic belt. It was found that elevated concentrations of this noble element are noted within the areas of telescoping of rocks of magmatic complexes formed in various geodynamic settings. The main testing ground for studying this problem was the southern framing of the Eastern flank of the Mongol-Okhotsk orogenic belt (Russia). Here, the processes of combining various magmatic stages, is most clearly manifested. The chosen object of study was the intrusive Uskalin massif. The massif is composed of rocks that reflect the following geodynamic events: initial over-subductional (149– 138 Ma), subductional (140– 122 Ma), collisional (119– 97 Ma). The formation of this massif is accompanied by extensive mineralization zones with gold-bearing veins. Therefore, gold contents have been established directly in the granitoids, which exceed the Clarke values by 2.25.