阿尔泰南缘发育大量火山岩及硫化物-Fe多金属矿床。从东向西,成矿元素组合依次为Pb-Zn、Fe-Pb-Zn和Cu-Zn。本文对阿尔泰南缘东部的萨吾斯矿床的火成岩做了主微量元素、Sr-Nd和锆石Hf-O同位素及闪锌矿的Pb同位素组成测定。对比了阿尔泰南缘东部、中部和西部5个铁-硫化物矿床的Pb和Sr-Nd同位素。康布铁堡组流纹岩来自于多旋回风化-剥蚀-搬运-再沉积碎屑物质的重熔,富集Zn,表现出碎屑物质的微量元素特征,导致萨吾斯和可可塔勒Pb-Zn矿床的高207Pb/204Pb、208Pb/204Pb及低206Pb/204Pb、εNd（t）。康布铁堡组下亚组中基性火山喷发为蒙库Fe矿的初始富集奠定了基础。中部的克兰盆地形成于洋陆过渡弧或属弧间盆地,康布铁堡组中下段中基性火山岩和上段流纹岩分别为Fe和Zn的富集奠定了基础,碳酸盐岩则造成了Pb的富集,从而形成铁木尔特Fe-Pb-Zn矿床。铁木尔特和蒙库矿床的206Pb/204Pb比值最高且变化大,反映了大洋岛弧火山岩的特征。在西部,阿舍勒组富镁英安岩来自流体交代的地幔楔,导致了阿舍勒矿床Cu的富集,赋矿岩石的εNd（t）值高,（87Sr/86Sr）i和矿石Pb同位素比值低。

Voluminous volcanic rocks and numerous sulfide-Fe deposits occur in the southern Chinese Altay Mountains. From the east to the west, metallogenetic associations vary from Pb-Zn through Fe-Pb-Zn to Cu-Zn. This study performed major and trace element, Sr-Nd and zircon Hf-O and sphalerite Pb isotopic analyses of volcanic rocks and ore minerals of the Sawusi Zn-Pb deposit in the east of the southern Chinese Altay. Sulfide Pb and volcanic-rock Sr-Nd isotopic compositions of five representative Fe-sulfide deposits from the east, middle and west of the southern Chinese Altay are compared. Rhyolites of the Early Devonian Kangbutiebao Formation were derived from detrital materials. The latter experienced poly-cycled weathering, erosion, transportation and re-deposition from the Gondwana land through the Tuva-Mongol or from the Caledonian province to the Chinese Altay, which itself was compressed and uplifted at~400 Ma, and finally delivered to the then trench on the south after erosion from top

提阿勒泰南缘诺尔特地区晚古生代火山岩十分发育，其中正格河一带出露一套片理化蚀变流纹岩与含凝灰质英安流纹岩的岩石组合，呈北西-南东向带状展布，前人将其划为石炭纪红山嘴组a段。本次工作对其进行的LA-ICPMS锆石U-Pb测年结果显示为早泥盆世（206Pb/238U加权平均年龄值为(400.4±3.6) Ma），时代不同于红山嘴组所属的石炭纪。其岩性明显区别于红山嘴组b、c段地层，且稳定成规模出露，故对此套流纹岩组合进行了重新厘定，暂命名为正格河火山岩。岩石SiO2含量在69.77%~75.16%，里特曼指数为1.26~1.70，(Na2O+K2O)介于5.90%~7.28%，A/CNK值介于0.88~1.16，显示钙碱性、偏铝质岩石特征。微量元素富集Rb、Th等大离子亲石元素，亏损Nb、Ta、Hf等高场强元素，稀土元素总量变化较大，∑REE介于189.20×10-6~308.47×10-6，轻、重稀土元素分馏较强（（La/Yb）N=5.82~7.86），铕负异常（δEu=0.45~0.75），具有与俯冲作用有关的岩浆作用特征。结合区域地质资料，表明正格河火山岩形成于活动大陆边缘构造环境。

The Nurt area is located in the southern part of Altay, where Late Paleozoic volcanic rocks are well developed. There exists a set of rock assemblages of altered rhyolite and tuff dacite rhyolite in Zhenggehe area, which are in zoned distribution from northwest to southeast and were originally assigned to member a of Hongshanzui Formation. The LA-ICPMS zircon U-Pb dating has revealed that the volcanic rocks formed in the Early Devonian (the zircon 206Pb/238U weighted average age is (400.4 ± 3.6) Ma), unlike Hongshanzui,whose age is of Carboniferous. The lithologic characteristics are obviously different from members b, c of Hongshanzui Formation, and are extensively stably distributed, so this set of rhyolites was re-determined, and tentatively assigned to Zhenggehe volcanic rocks. The SiO2 values range from 69.77% to 75.16%, and σ from 1.26 to 1.70, Na2O+K2O values range between 5.90% and 7.28%, A/CNK ratios range between 0.88 and 1.16, with sub-alkaline, calc-alkaline and