东昆仑哈日扎铅锌多金属矿床金属矿物与S-Pb同位素特征
The Metallic Minerals and S and Pb Isotope Compositions of the Harizha LeadZinc Polymetallic Deposit, East Kunlun

摘要： 东昆仑哈日扎铅锌多金属矿床位于东昆仑造山带东段，紧邻昆中断裂北侧。已获得的资料显示哈日扎铅锌多金属矿床具有良好的找矿前景。通过对矿床内主要金属矿物及其SPb同位素组成进行详细研究，探讨其成矿温度与物质来源。研究表明：闪锌矿中Fe元素含量为9751%~12736%，Zn/Cd比值的变化范围为5650~11439，初步推测成矿温度为中—低温；矿床中各硫化物的δ34S值变化范围为-38‰~-05‰，具有深部岩浆硫的特征，且不同硫化物矿物中的S同位素未达到平衡分馏；Pb同位素变化相对较小，206Pb/204Pb、207Pb/204Pb及208Pb/204Pb值变化范围分别为18254~18504、15614~15800和38429~39028；表明其成矿物质主要来源于下地壳的部分熔融与深部岩浆的混合。
Abstract: The Harizha leadzinc polymetallic deposit is located in the eastern part of the East Kunlun orogenic belt, closing to the north side of the central Kunlun fault. The reported data show that the Harizha leadzinc polymetallic deposit has a good prospecting potential. This paper focuses on the temperature and source of oreforming materials, based on the studies on the characteristics of metallic minerals and their SPb isotopes from the Harizha leadzinc polymetallic deposit. The data show that the content of Fe in sphalerite ranges from 9751% to 12736%,and the range of Zn/Cd value is 5650 to 11439, suggest that the Harizha leadzinc polymetallic deposit is a mediumlow temperature deposit; The δ34S values of sulfide minerals in the deposit range from -38‰ to -05‰, indicating that sulfur is sourced from the deepsource magma，and the S in different sulfides are not in equilibrium. The 206Pb/204Pb,207Pb/204Pb and 208Pb/204Pb ratios of sulfide ores are 18254-18504, 15614-15800 and 38429-39028, respectively, which suggest that the oreforming materials were mainly derived from the parental magma generated by mixing of mafic magma and felsic magma formed by remelting of lower crustal rocks