129
Auriferous
formations:
%%
Magmatic:
15
Ultramafic
and
mafic
lopoliths
and
laminated
intrusions.
Picrite and olivin
gabbro-dolerites.
Greenstone belts.
Au-qu, Au-S-qu,
Au-S, Au (Pt,Pd)
Dunite-pyroxenite-
gabbro
intrusions.
Toleite-rhyolite
volcanism
and
granodiorite-granite
intrusions
Au-qu, Au-S-qu,
Au-S, Au (Pt,Pd)
Andesite-basalt,
dacite-rhyolite
and
alkaline-basalt
volcanism.
Granodiorite-
granite intrusions
Au-qu, Au-S-qu,
Au-S
Plato-basalts.
Riftogenic
komatiit-basalts
and
toleite-
basalts.Subalkaline-
basalt volcanism.
Ferromanganese
nodules.
Au-S (Fe,Mn)
Коmatiite
1
Ni-Cu
(Pt,Co,Cr,Au)
Ni-Cu (Pt,Au)
Ni-Cu,Co
(Au,Te)
Ni-Co (Au?)
Dunite-
pyroxenite-
gabbro
2
Pt,Pd (Cr,Au)
Pt-Pd (Cr,Au)
Dunite-
garzburgite-
ophiolite
2
Cr,Pt
(Co,Ni,Fe,Au)
Cr,Pt (Co,Ni,Fe,Au)
Cr, Pd (Au)
Picrite-olivinite-
gabbro-dolerite
3
Cu,Ni (Pt,Pd,Au)
Cu,Ni (Pt,Pd,Au)
Cu,Ni (Au,Te)
Granodiorite-
granite
17
Au-qu,
Au-Cu-Mo-qu
Au-qu,
Au-Cu-Mo-qu
Alaskite - granite
22
Cu-Au porphyry
Cu-Au porphyry
Cu-Au porphyry
Pegmatite
1
Mu,Be,RM,U,Au
Mu,TR (Au)
Greisen
1
Sn,W,Mo,Au
Sn,W,Mo,Au
Auriferous
sedimentary
volcanic
formation
17
Au-qu, Au-S-qu,
Au-S
Au-qu, Au-S-qu,
Au-S
Au-qu, Au-S-qu,
Au-S
Auferous
terrigeno-
carbonic
formation
19
Au-qu, Au-S-qu
Au-qu, Au-S-qu
Total auriferous
formation
100
Gold ore types:
%%
Gold-quartzes
30
Au-qu
Au-qu
Gold-sulphide-
quartzes
20
Au-S-qu
Au-S-qu
Gold-sulphide
7
Au-S
Au-S
Au-S
Au-S (Fe,Mn,Cu,)
Gold-silver
10
Au-Ag-Co
Au-Ag
Au-Ag
Au-Ag (Fe,Cu)
Gold-copper
porphyry
22
Au-Mo-Cu
Au-Cu
Au-Cu
Gold-antimony-
arsenic
2
Au-Sb-As
Au-Sb-As
Gold-antimony-
mercury
2
Au-Sb-Hg
Au-Sb-Hg (Ag)
Gold-wolframite-
cassiterite
1
Au-W-qu
Au-Sn-qu
Golden skarn
2
Au (Pt,Bi,Te)
Au ( Cu, Fe)
Replacement
2
Аu - CaCO
3
Аu - CaCO
3
130
of type “Manto”
Replacement
of type “Carlin”
2
Au (Ag,Sb,Hg)-qu
Au (Ag,Sb,Hg)-qu
Gold-copper-
uranium
of type
”Olympic Dam”
2
Au-Cu-U
(Pt,Pd,Te)
Au-Cu-U (Mo,TR)
Total types
of gold ores
100
Gold
sedimentary
detrital
formation:
%%
Metamorphic old
placers of gold
77
Au-U-di (Pt,FeS
2
)
Loose young
placers of gold
22
Au (Pt)
Gold-uranium
discordant old
buried
weathering
corks
1
Au-U (Pt,Ni,Co)
Total placers of
gold
100
) See Table 3
3. AURIFEROUS EPOCHS OF THE EARTH
Scientific and practical interest represents the distribution amounts of
gold in initial deposits and placers on a geological times of their formation. The
calculations have shown, that out of the total reserves and resources of gold in
the revealed deposits in amounts of 195,000 t the richest epochs appeared to be:
late Archean (3.0 – 2.5 Gа) = 94,500 t (48.4%) and Phanerozoic (440-0 Ма) =
90,000 t (46.2%). In the Proterozoic epoch (2.5-0.5 Gа) it is revealed only
10,500 t (5.4 %) resources of gold (Table 3, Figure 2). It seems remarkable, that
the total amounts of gold and the duration of formation rich deposits both in late
Archean and in Phanerozoic are approximately equal and the intervals of times
make nearly 450-500 Ма. The maximum formation of the richest gold deposits
fall on follow period of time: 2.7-2.6 Gа, 320-280 Ma, 130-80 Ma and 20-0 Ма
( Konstantinov et.al., 2000; Krutoyarskiy et. al., 2000 ).
The synthesis of petrochemical data on all diapason of geological time has
demonstrated a sharp increase of concentration potassium in metamorphic,
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