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

olistolith. The deposit is currently being mined. Average grades are 62 g/t Ag, 1.5-8.7% Pb, and, 1.36-10.5% Zn. The deposit has
been mined from 1970's to present. The main shaft is about 500 m deep.
Partizanskoe Pb-Zn Skarn hposit
The Partizanskoe Pb-Zn skarn deposit (fig. 87) (Ration, Simanenko, and Logvenchev, 1991) consists of numarow small
steeply-dipping ore bodies which occur at the contact of a Triassic Iimestone olistalith stm~~nded by Early C~WWXNLS elastic
Clashc sebmerltery rodcs (Eady CMaamus)
,. c.,i bmXi~~EbsRlalfrag.rrren2sd
~,(w~-)
! % i a 3 o S ~ a u i ~ ( T ~ , ~ ,
~WCrPIQPoears)
~ic)kaomdm~rrm)
Btolite-danbufte-wollaslmb
hdenberg~t-drad~te sksn
- 500M
Figure 85. Dalnegorsk B skam deposit, Taukha metelbenlc beA, Russtgn Southe&. Schematic poiogic map. Adwted W m
Nosenko and Chemyshov (1987).
rocks. The ore bodies merge and form a single skarn deposit but 400 m below the surface, 8nd pinch ord at a depth of
approximately 600 m. The ore and skarn assemblages are vertically zoned; higher temperature assemblages occur docpcr.
Massive, densely dssemlnated Ag-Pb-Zn ore (m,/Zn ratio of about 1.0) occurs above a quartz-cahte aggregate io the upper part
of the deposlt. Masslve, densely-disseminated Pb-Zn ore (PWZn ratio of about 0.8) is associatad witb b-bexl-pite &am and
occurs at the middle part of the deposit. And disseminated Zn ore (PWZn ratio of about 0.5) occurs ia ikaite-pmd-hbbcrgite
skarn in the lower part of the deposit Galena and sphalerite are the darninant ore minerals; chalcopyrite and mmopyriie are
common; minor mapet.te. pyrrbotite, and mmsite also occur. Silver-beariog minerals are Ag- and Sb-suIfWlts in the rvppcr
. .
part of the deposit and galena in the lower part, Galena contains Ag as a solid solution of mfttU€e. The age 0fmbmbb.m is
bracketed between 60 and 70 Ma by basalt dikes, witb K-Ar iilobpic ages of 60-70 Ma, whichcut the &posh at the axttwt of
olistolith, and by the lower part of the overlying volcanic strata, with K-Ar ages of 70-80 Ma, which are cur hy ore body. The
deposit consists of four or more related ore bodies which occur over about 5 km strike leagth, including the Soviet 2, Parkxwk
East, Partizansk West, and Svetlotvod ore bodies. The undexground workings for the ore bodies follow confacts, slad bve a t~hl
length of about 1 1 km. The deposit is of medium size. Average grades are 67.6 g/t Ag,, 1.5-3 % Pb, and 8.64 Zn 46. The +sit
has been mlned from the 1950's to present.