地质与勘探2011，Vol.47Issue(4)：624-632,9.
新疆小热泉子铜（锌）矿床同位素地球化学研究及其意义
Isotopic Geochemistry of the Xiaorequanzi Copper （zinc） Deposit in Xinjiang and Its Significance
摘要
Abstract
The Xiaorequanzi copper （zinc） deposit is situated in the late Palaeozoic Haerlike-Dananhu island-arc zone north to the convergence belt between the Junggar plate and the Tarim plate. The study of isotope geochemistry shows that the δ^18O value of quarts is 6.5‰-10‰ from the quart sulfide veins, and the δ^18O value of fluid from quarts and sphalerite is 0. 1‰-1.73‰. The δDH2o value in the fluid inclusions is -105‰ — -66%0. Combined with the geological characteristics of the ore district, the metallogenic fluids may result from the interaction of subvolcanic hydrothermal fluids with paleo-sea water. The δ^34S value of the sulfide is 3. l‰ - 13.4‰, which has the bimodal character, in which one peak value is 4‰ -7‰, and the other is 11‰ -12‰. The early S isotopic composition dominated by pyrite has a close relationship with the sulphate from paleosea water, while the late S iso- tope from sulphide resulted from different grades of interaction of S from pyroclastic rock with reducing S in paleosea water. The ^206Pb/^204Pb ratio is 17. 669-17. 798, 17.7188 on average, the ^207 pb/2e4 Pb ratio is 15.36 - 15. 495, 15. 4243 on average, and the ^208 pb/^204 Pb ratio is 37. 279 - 37. 525, 37. 3958 on average, respectively. The/x value is g.07 -9.34,the Th/U ratio 3.56 -3.67, 49.53〈△α〈62.78,3.59〈△β〈13.10 and 12,51〈△γ〈24. 47, showing typical crust-mantle-derived Pb isotopic characteristics.关键词
氢氧同位素/硫同位素/铅同位素/铅锌矿/小热泉子/新疆Key words
hydrogen and oxygen isotope/sulfur isotope/lead isotope/Xiaorequanzi/Xinjiang分类
天文与地球科学引用本文复制引用
刘申态,吕新彪,曹晓峰,张平,邓杰,刘智..新疆小热泉子铜（锌）矿床同位素地球化学研究及其意义[J].地质与勘探,2011,47(4):624-632,9.基金项目
本文为“十一五”国家科技支撑计划新疆305项目《东天山一北山成矿带整体研究及找矿靶区优选评价》（编号：2007BAB25804）资助的成果. （）
