OFS formation stages (time intervals) | Sources of fluids and ore components | Mobilization and concentration factors of ore elements |
Ore preparative I—magmatic (Riphean–Vend) | Mantle | Fluid-magmatic. Ore-geochemical specialization of the volcano-plutonic ultrabasite-basite association |
Ore preparative II—mud-volcanic (Cambrian) | Crustal | Hydrothermal-sedimentary with the participation of microorganisms during thermal sources functioning and the formation of travertines (“limestone”, “calcareous siltstones”). |
Ore preparative III—dynamometamorphic (medium? Paleozoic) | Crustal | Tectonic-metamorphic. Inheritance with amphibolites, crystalloslates and, serpentinites of ore-geochemical specialization of the ore preparative rocks stages I and II. |
Break. The granitoids formation of the Angara-Vitim areal-Pluton (upper Paleozoic) | ||
Ore preparative IV—magmatic (lower Mesozoic) | Mantle-crustal | Fluid-magmatic volcano-plutonic shoshonite-latite association, inherited ore-geochemical specialization of ore preparative stages I-III. |
Ore stages I-IV—dynamometamorphic (Triassic) | Crustal | Tectonic-metamorphic. Deformational transformations of volcano-plutonic shoshonite-latite series rocks. |
OFS biogenic transformation (Yurassic?—Cenozoic) | Crustal | Biogenic inheritance of ore stages geochemical specialization with partial conservation of noble metal high concentrations. |