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

Figure 90. lskra deposit Sn polyrnetallc vdn &&mait LL&&I#~$ n-c bel, W m Souha$& Scheme&@oglc rmp . '
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and cross section. Adapted lbm Gonavchuk snd others (lW8).
. . . . ,.*- :,
% ,
Zimnee Sn PdymddJIe Vein Dm- . . 9-
. .
The Zirmec Sn mblk u
Gcmev&& and others, 1998) oandiils of
and pockets wbicb occur in fhwhm mner Tbe h
clip, and vaq in hiboss 6-m~ s d m(bS Of m
eoasisls mainly of pyrhoths, pp&, manoWrite,
upper part of veins is w l y galens with finegrahed ca#slteite. Near h #mnd&, tbe me
fragments of tiwdMe mmda which n wmnkd by a +-micacoolu (&mscu) qgr
Tbt K-Ar age of altaod rwks &ated witb tbe Sn-polymdlic opw is 75 8. The rlpc k+-
50 Ma as datermirrad by a K-Ar ~e of 50 Me for tbc gmwdiarib. The deposlb d2b.ik ngi0d .ma%mma&im, -,
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d Avenge grades are 0. I-3.0% Cu, 3.1894 Pb, 0.59% Sn. otd 4,0596 Za
4 m
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