新疆北准噶尔成矿带赋矿地层稳定同位素研究

Study on Stable Isotopes of Ore-forming Strata in the North Junggar Metallogenic Belt, Xinjiang

为探讨成矿带的成矿原因及地质特征,以新疆北准噶尔成矿带为例,对赋矿地层稳定同位素进行深入研究。采集赋矿地层的矿石样品,测定样品中的稳定同位素特征,示踪方解石包裹体的H、O同位素,以及石英的C、S同位素,确定同位素的值域范围,绘制判别图,从而分析样品的形成环境与成矿关系。结果表明,该成矿带的成矿流体来源于大气降水,成矿金属物质大部分来源于前寒武纪地层,碳质则来源于上古生界气源岩。

In order to discuss the metallogenic reasons and geological characteristics of the metallogenic belt,taking the North Junggar metallogenic belt in Xinjiang as an example,we conducted an in-depth study on the stable isotopes of the ore-forming strata.Collect ore samples of ore-bearing strata,determine the stable isotope characteristics in the samples,trace the H and O isotopes of calcite inclusions,and C and S isotopes of quartz,determine the range of isotopes,draw a discriminant map,and analyze the sample Form the relationship between environment and mineralization.The results show that the ore-forming fluids in the ore-forming belt are derived from atmospheric precipitation,most of the ore-forming metal materials are from the Precambrian strata,and the carbonaceous materials are from the Upper Paleozoic gas source rocks.