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.