滇东北火德红铅锌矿床地球化学特征与成矿机制分析

发布时间：2018-03-25 22:20

  本文选题：地球化学　切入点：同位素组成　出处：《矿床地质》2016年05期

【摘要】：文章通过研究滇东北火德红铅锌矿床岩石地球化学和S、Pb同位素地球化学特征,分析其成矿金属和成矿流体来源,进而对其成矿机制进行探讨。围岩主量与微量元素分析结果表明,火德红铅锌矿床为后生热液矿床,铅锌等成矿金属物质随热液进入赋矿围岩,结合围岩蚀变特征判断,其应属中_低温热液成因;闪锌矿与黄铁矿的δ34S主要分布在-17‰~-11.4‰,其S源极可能来自生物成因硫酸盐还原,与川滇黔地区铅锌矿的S同位素来源(总体来自海水硫酸盐热化学还原)有着明显的不同;矿石硫化物的Pb同位素比值变化范围较窄,均为正常Pb;Pb同位素主要来自于上地壳,有少量岩浆物质混入。上述特征表明火德红铅锌矿床为构造和岩性共同控制的后生热液型矿床,其成矿机制与典型MVT型铅锌矿相似。
[Abstract]:Based on the study of the geochemistry of rocks and the isotopic geochemical characteristics of Sch Pb in the Huode Red Pb-Zn deposit in northeastern Yunnan, the source of metallogenic metals and ore-forming fluids is analyzed in this paper. The main amount of surrounding rock and trace element analysis results show that the Huode red lead-zinc deposit is a epigenetic hydrothermal deposit, and the ore-forming metal materials such as lead and zinc enter the ore-bearing surrounding rock with hydrothermal solution, and judge the alteration characteristics of surrounding rock. The 未 34s of sphalerite and pyrite are mainly distributed in -17 鈥，

本文编号：1665104