STABLE ISOTOPE CHARACTERISTICS OF THE JIN CHANG GOU LIAN GOLD DEPOSIT IN INNER MONGOLIA AND ITS ORIGIN

The research on stable isotope is very important and useful for analyzing the origin of deposits.The H,O,C and S isotope of quartz mineral vein in gold deposit of Jinchanggouliang in Inner Mongolia inherits the characteristics of metamorphic rocks and magmatic rocks in the area.Their compositions of hydrogen,oxygen,carbon and sulphur isotope have the similar traits and the changeable range of δ¹⁸O_H2O and δD isotopic value is also similar.These features indicate that the Archean metamorphic rock in this area is the source of ore material of gold deposit,and the magmatized hydrothermal made the source of the ore material active many times and the ore materials gradually gathered in the suitable tectonic fractures and eventually formed the gold deposit in the late Yanshanian stage.So the gold deposit is a magma-hydrothermal-type ore deposit associated with multiple mineralization.