(1. 广州海洋地质调查局，广州 510760；
2. 中国地质大学(武汉) 地质调查研究院，武汉 430074；
3. 中国地质大学(武汉) 资源学院，武汉 430074)
摘 要: 滩间山金矿是位于我国柴达木北缘(柴北缘)中的典型的造山型金矿。本次工作利用激光剥蚀电感耦合等离子体质谱(LA-ICP-MS)对滩间山金矿主要载金黄铁矿进行微量元素分析；通过野外实地调查及室内显微镜下观察，将载金黄铁矿分为四类: 蚀变炭质糜棱片岩型黄铁矿(Py1)、石英脉型浸染状黄铁矿(Py2)、石英脉型团块状黄铁矿(Py3)、脉岩中浸染状黄铁矿(Py4)。结果表明，黄铁矿Py1到Py4的微量元素特征指示其温度逐渐升高，结合矿区内同位素年代学资料，认为不同类型黄铁矿对应滩间山金矿成矿演化过程四阶段中的后三阶段：海西早期，构造挤压Au矿化富集阶段(Py1)；海西晚期，构造伸展阶段Au矿化叠加富集阶段(Py2，Py3)；印支期，柴达木-祁连地体地壳抬升Au矿化再富集阶段(Py4)。
关键字: 滩间山；造山型金矿；黄铁矿；微量元素；成矿演化
（1. Guangzhou Marine Geological Survey, China Geological Survey, Guangzhou, 510760, China;
2. Institute of Geological Survey, China University of Geosciences, Wuhan 430074, China;
3. The Faculty of Earth Resources, China University of Geosciences, Wuhan 430074, China）
Abstract:The Tanjianshan gold deposit, locates in the northern Qaidam metallogenic belt, is a typical orogenic gold deposit. Laser-ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) analysis was conducted to determine the chemical composition of the bearing-gold pyrites in the Tanjianshan gold deposit. Four types of pyrites were recognized through detailed field work and microscopic studies. The first type of pyrites (Py1) is mainly present in altered carbonaceous mylonite schist. The second type of pyrites (Py2) occurs as veins or veinlets in the quartz. And the third type of pyrites (Py3) appears as mass in the quartz. The fourth type of pyrites (Py4) is mainly present in the vein rock, which is intruded into the mylonite schist. The results show that these pyrites indicate that the temperatures at which they formed increases from Py1 to Py4. According to the epochal characteristics of the Tanjianshan gold deposit, the four types of pyrites correspond to the later three stages in the metallogenic evolution of Tanjianshan gold deposit: Py1 was formed in tectonic extrusion environment during early Hercynian, Au began to enrich at the stage; Py2 and Py3 were produced in tectonic extension environment during later Hercynian, which Au occurs superpositione; Py4 was generated in crustal uplift of the Qaidam and Qilian block, Au occurs enrichment again.
Key words: Tanjianshan; orogenic gold deposit; pyrite; trace elements; metallogenic evolution
