The Dzhalinda Deposit in the Amur Region,Russia: Genesis and position in the classification of tin deposits |
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| Authors: | P G Korostelev V G Gonevchuk B I Semenyak N V Gorelikova A A Karabtsov A M Kokorin V V Kononov A A Orekhov P P Safronov E Ya Sinyakov |
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| Institution: | (1) State Key Laboratory of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, China;(2) Graduate School, Chinese Academy of Sciences, Beijing, 100049, China;(3) Institute of Mineral Resources, Chinese Academy of Geological Sciences, Beijing, 100037, China;(4) Tianjin Institute of Geology and Mineral Resources, Tianjin, 300170, China;(5) Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002, Guizhou Province, China; |
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| Abstract: | The Dzhalinda wood tin deposit is located at the eastern margin of the Bureya Massif and, according to the Russian classification
of tin deposits, is referred to the rhyolite-hosted type. The Dzhalinda deposit is compared with the deposits located in the
southwestern United States and in northern Mexico. In spite of some similar features, the Dzhalinda deposit differs significantly
from the American deposits in the composition of ore-bearing rhyolite and the type and composition of host rocks. It is suggested
that the ore-bearing rhyolitic melt at the Dzhalinda deposit evolved with the formation of a highly silicic residual melt
depleted in P and Li and enriched in Sn, being opposed in this respect to the ongonite model typical of such deposits. The
drastic change in the physicochemical parameters of the system caused by the evolution of the melt under near-surface conditions
of a volcanic vent led to the separation of Si-Sn complexes, which broke down into various silica modifications and oolite-like
wood tin. |
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