USGS Professional Paper 1697 - Alaska Resources Library

Origin of and Tectonic Controls for Taukha
Metallogenic Belt
The Cretaceous granitoid rocks hosting the Taukha metallogenic
belt are part of the East Sikhote-Alin volcanic-plutonic
belt (fig. 79) of Late Cretaceous and early Tertiary age (Vasilenko
and Valuy, 1998). The volcanic and plutonic units are
widespread and are controlled by NE-trending strike-slip and
pull-apart structures. The B and Pb-Zn-Ag sulfide deposits are
hosted in tectonic lenses of limestone or marble that occur in
the Tauka accretionary-wedge terrane. The terrane consists of
mainly of Neocomian turbidite deposits and olistostromes, and
Paleozoic and Mesozoic guyots that consist of limestone caps
overlying basalt pedestals, and Carboniferous through Jurassic
chert, Berriasian through Valanginian turbidite, and Permian,
Triassic, and Berriasian through Valanginian shelf sandstone
and turbidite deposits (Nokleberg and others, 1994c, 1997c).
Like the Kema and Luzhkinsky metallogenic belts, the
coeval Taukha metallogenic belt is hosted by East Sikhote-
Alin volcanic-plutonic belt of Late Cretaceous and early
A
400 m
200 m
0
A
Map
Cross section
Tuff and ignimbrite
(Late Cretaceous)
Rhyolite porphyry
(Late Cretaceous)
Eruptive breccia
(Late Cretaceous)
Explosive breccia
(Late Cretaceous)
0 200 400
600 m
B
Lava and volcanic
breccia (Late
Cretaceous)
Tuff (Late Cretaceous)
Polymetallic vein
Fault
Contact
Figure 88. Krasnogorskoe Pb-Zn polymetallic vein deposit,
Taukha metallogenic belt, Russian Southeast. Generalized
geologic map and cross section. Adapted from Ratkin and others
(1990). See figure 79 and table 4 for location.
Early Late Cretaceous Metallogenic Belts (100 to 84 Ma; figs. 79, 80) 187
B
Tertiary age (fig. 79) that is described in the above section the
origin of the Taukha metallogenic belt. Other related, coeval
metallogenic belts hosted in the East-Sikhote-Aline volcanic
belt are the Kema, Luzhkinsky, Lower Amur, and Sergeevka
(SG) belts (fig. 79; table 3). The differences between the
coeval metallogenic belts are interpreted as being the result of
the host igneous rocks intruding different bedrock. The Taukha
metallogenic belt contains mainly B skarn, Pb-Zn skarn, and
Pb-Zn polymetallic vein deposits, and is hosted in or near
igneous rocks of the East Sikhote-Alin belt that intrude the
Taukha accretionary-wedge terrane, which contains a complex
assemblage of abundant Paleozoic and early Mesozoic oceanic
rocks and lesser Jurassic and Early Cretaceous turbidite deposits.
In contrast, the Luzhkinsky metallogenic belt contains
mainly Sn greisen and Sn polymetallic vein, and porphyry Sn
deposits, and is hosted in or near granitoid rocks of the East
Sikhote-Alin belt that intrude the Zuravlevksk-Tumnin turbidite
basin terrane that contains mainly Late Jurassic and Early
Cretaceous turbidite deposits.
Kema Metallogenic Belt of Ag-Au Epithermal
Vein, and Porphyry Cu-Mo Deposits (Belt KM),
Eastern Part of Russian Southeast
The Kema metallogenic belt of Ag-Au epithermal vein
and porphyry Cu-Mo deposits (fig. 79; tables 3, 4) occurs in
the eastern part of the Russian Southeast. The deposits in the
metallogenic belt are hosted in or near Late Cretaceous and
early Tertiary granitoid rocks of the East Sikhote-Alin volcanic-plutonic
belt that intrude or overlie the Kema island-arc
terrane (Nokleberg and others, 1994c, 1997c).
The major Au-Ag epithermal vein deposits in the Kema
metallogenic belt are at Burmatovskoe, Glinyanoe, Salyut,
Sukhoe, Tayozhnoe, Verkhnezolotoe, and Yagodnoe (table 4)
(Nokleberg and others 1997a,b, 1998). Porphyry Cu deposits
are at Nesterovskoe and Nochnoe; porphyry Cu-Mo deposits
are at Sukhoi Creek; and a porphyry Mo deposit is at Moinskoe.
The Ag epithermal vein deposits, as at Tayoznoe, also
occur in Early Cretaceous clastic and volcaniclastic rocks
and in overlying Late Cretaceous and Paleogene, subalkalic,
postaccretionary volcanic rocks of the East Sikhote-Alin igneous
belt. Ag sulfosalt minerals predominate in the deposits.
Concentrations of Ag are much greater than Au, and Ag/Au
ratios generally are greater than 25 to 30. Rare Pb-Zn polymetallic
vein deposits occur in the metallogenic belt but are
not economic (P.I. Logvenchev, O.L. Sveshnikova, and V.A.
Pakhomova, written commun., 1994; Pakhomova and others,
1997). However, these deposits are generally of little commercial
value at the present. The epithermal vein deposits generally
occur mostly in or near Danian (early Paleocene) and
Paleocene volcanic rocks; however, a few occur in granodiorite
plutons (Khomich and others, 1989).
Porphyry Cu-Mo deposits in the Kema metallogenic
belt occur mainly in the northern part of the belt at Moinskoe,
Nochnoe, and Sukhoi Creek. These deposits generally