Abstract:

In order to discuss the oreforming material sources of the Dongzhongla PbZn deposits and study the metallogenic mechanism，we analyzed the sulfur and lead isotope from the orebody，discussed the changing regularity and significance.  The results show that the δ³⁴S values of the six metal sulfides vary from 2.2‰ to 4.8‰, and that the sulfur isotope composition is stable.  The temperatures calculated from sulfideparas show that the deposits are the middlelow temperature deposits.  The ²⁰⁶Pb/²⁰⁴Pb，²⁰⁷Pb/²⁰⁴Pb and ²⁰⁸Pb/²⁰⁴Pb ratios of 6 sulfide samples of orebody vary in ranges of 18.628 0-18.629 6，15.698-15.699 9,39.0775-39.082 4，with the average values of 18.628 7，15.699 02 and 39.079 37, respectively.  The results of sulfur and lead isotope show that the oreforming materials of Dongzhongla PbZn deposits came from the Permian volcanic sedimentary rock and late Yanshan period granite.

Key words: sulfur and lead isotope；oreforming material source；Dongzhongla leadzinc deposits；hydrothermal deposit；&delta, ³⁴S value；upper crust material