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Encyclopedia Britannica - Main :: NAN-NEW |
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NERCHINSK MINING DISTRICT extends over an area of 29,450 sq. m., and includes all the silver-mines and gold-fields between the Shilka and the Argun, together with a few on the left bank of the Shilka. It is traversed by several parallel chains of mountains which rise to 4500 ft., and are intersected by a complicated system
population (75,625 in 1897) consists of Russians, Buryats and Tunguses. Included in this number were some 2300 convicts. The mountains, so far as they have been geologically explored, consist of crystalline slates and limestonesprobably Upper Silurian
syenite
rich
iron , while the diluvial and alluvial valley formations contain productive auriferous sands.The Nerchinsk silver mines began to be worked in 1704, but during the first half of the 18th century their yearly production did not exceed 8400 oz., and the total
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