Metallogenic OFS types, subtypes of noble metal type. In brackets, their numbers shown in Figure 6

Age (million years) intervals of OFS formation (isotope-geochemical data)

Primary rock complexes with increased geochemical background of Fe, Ti, Ni, Pb, Zn, and noble metals

Deposits, mineral occurrences examples of suture tectonic zones

1

2

3

4

Nyandony subtype

1600-550

Carbonaceous volcanogenic-carbonate-terrigenous strata with volcanite bodies of picrite-basalt-andesite-rhyolite series

Kamenny, Namama,

Chipikan, Bakhternak, Troitsk

Iron-ore

1580-927

Volcanogenic-sedimentary strata with diabases sills, basalts of the komatiite-toleite association

Tiya (same name ore zone), Yazov (Vitim iron-ore region)

Pyrite-polymetallic

1500-550

Carbonaceous-siliceous-carbonate-terrigenous strata with volcanites of the komatiite-basalt and basalt-rhyolite associations

Kholodny

Darasun subtype

1472-100

Plutonic ultrabasite-basite complexes of the komatiite-toleite association

Darasun, Kara, Itaka,

Klyuchevsky, Ushmun,

Irokinda

1060-470

Volcano-plutonic ultrabasite-basite complexes of the komatiite-basalt-boninites series

Irokinda, Gorny, Kedrovsky,

Baley subtype

1050-114

Buried ultrabasite-basite komatiite-tholeiite association

Baley, Taseevo

Copper-nickel (±PGE)

937-600

Stratified arrays of dunite-peridotite-gabbro and dunite-troctolite-gabbro formations

Chaya, Baikal, Marinkin

Bodaybo subtype

870-<65

Buried basite-ultrabasite complex. Black shale formation of over rift depressions

Sukhoy Log, Chyortovo Koryto, Pervenets

Irba subtype

825-550

Komatiite-basalt-boninite volcano-plutonic association

Yubileyny, Irba

Iron-titanium (±V, P)

780-590

Stratified arrays of anorthosite-pyroxenite-gabbro formations

Vitimkan, Irokinda, Kedrovsky