Metallogenesis and Tectonics of the Russian Far East, Alaska, and ...

A Cross section
River gravd md sand
(Quaternary)
Partiaolwred limestone
(Mddle Cambrian)
Grey-green lineslone with
gkwconite and black
siliceous sittoQne
(Lower Cambrlm)
Moslone, timestone,
stromatdithic b ' i ,
carbonate bmocla, more
mad sandstone,
&%. tuk ("endim)
Greenish-grey sandstone,
siltstone v ted wgiHit%
(Upper k S n )
Zn-Pb ore body
I / Conw
Figure 26. Sar&na Southeast Missouri Pb-Zn deposit, Sette-Daban metallogenic belt, Russian Northeast. Schematicgedoglc m p
and cross section. Adapted from Shpikerman (1998) using materials of A.I. Starnikov and A.V. Prokopiev.
Kurpw,&he SactlmenBHosted Cv Deposit
The Kurpandzha Southeast sediment-hosted Cu deposit (Kutyrev, 1984; loganson, 1988) consists of more than three
stratified horiz~lls of finely disseminated to massive copper ore which is hosted in Late Devonian to Edy Crrrboniferous ooastsl
and del4aic sandstcm. The mnh ore minerals are chalcocite, bornite, chalcopyrite, and pyrite. Ore bodies range fn>m 0.2 9 to 4 m
thick and up lo 1.5 km long. The host polymictic sandstone contains pyroclasts of volcanic rock. The deposit occurs in a
slraligraphic interval from 50 up to 300 m thick which is underlain by Famennian basalt which also contains copper
mineralization. The deposit o ~cm within a major syncline which has an amplitude of up to 4 km. Ore bodies and host rocks shilce
at 40 to 706 on syncline limbs.
The well-known basaltic Cu deposit af Dzhalkan (Kutyrev, 1984; Kutyrev and others, 1988) o c c ~
in a F B ~ ~ P U I
amygdaloidal basak flow and near the Kurpandzha sediment-hosted Cu deposit. The deposit consists of dimmbated Cu in ti
sequtnce of basak flows with a (Otal thickness of 180 m. The deposit is mostly confined to horizons which range from 0.5 to 2.0
thick and contain both cinders and amygddes at the top of flows. The ore minerals include rmative copper and cuprite, with lesser
hite, chakocite, md chalcopyrite. Epidasite (epidote-quartz) wallrock alteration occurs locally. The ore bodies range from 0.3
to 1.0 m thick and up to 100 rn long. Areas ofcopper mineralization are separated by unmineralized areas of up to several
kilometers. The deposit is small with average wdes of 0.3 up to 4.5% Cu. The basalt flows erupted into shallow water and
subaerial eavh-ents. The host basalt9 are folded, with fold limbs dipping 40 to 60'.
' 4'
. 7: I ,