Lead isotopic compositions of sulfides in the Taoxikeng tungsten deposit,southern Jiangxi and their geological significance
In order to study the source of ore-forming materials of the Taoxikeng tungsten deposit in Chongyi County of the southern Jiangxi,in this paper,we have analyzed major element compositions of the concealed granite in the deposit,and have selected 32 samples of sulfides including pyrite,chalcopyrite and arsenopyrite which are closely associated with wolframite in the deposit for Pb isotope analysis.The results show that the concealed granite in the Taoxikeng deposit has the characteristics of A-type granite.The Pb isotopic compositions of five sulfide samples have relatively small values but a wide range of variation,showing the characteristics of crust-mantle mixed materials.The Pb isotopic compositions of other 27 sulfide samples are relatively stable,showing the characteristics of upper crustal lead.The study shows that the concealed granite was mainly formed by the remelting of the upper crustal materials which contain a small amount of the crust-mantle mixing sourced magmatic rock.The ore-forming elements such as tungsten in the deposit were mainly sourced from the granitic magma formed by the remelting of the upper crust materials containing a small amount of the crust-mantle mixing sourced magmatic rock.
Taoxikeng tungsten depositgranitePb isotopesource of ore-forming materials
万方数据
维普
