Peculiarities of Distribution of Trace Elements in the Major Ore Types from the Mesozoic Gold Deposits of East Transbaikalia

摘要

It has been established that different ore types from the Mesozoic gold deposits of East Transbaikalia were formed from variously differentiated ore-bearing magmatic chambers at different depths of the upper continental crust. The magmatic chambers, which were sources of gold-quartz-arsenopyrite ores, were most differentiated (Eu/Eu~* = 0.29-0.32; Rb/Sr = 0.98-1.40) and shallow-seated (Eu/Sm = 0.08-0.14) in contrast to less differentiated and deeper sources of the gold-quartz and gold-sulfide-quartz ores (Eu/Eu~* = 0.53-0.72, Rb/Sr = 0.10-0.54, Eu/Sm = 0.11-0.19).