胶东山后金矿流体包裹体及H-O-S同位素特征

发布时间：2018-07-03 12:58

  本文选题：流体包裹体 + H-O-S同位素　； 参考：《地质科技情报》2017年06期

【摘要】：通过对胶东山后金矿流体包裹体岩相学观察、显微测温和激光拉曼以及H-O-S同位素分析,研究了该矿床流体特征和物质来源。研究表明成矿流体早期为低盐度、低密度富CO_2的NaCl-H_2O-CO_2体系,之后由于沸腾作用逐渐演化成NaCl-H_2O体系,矿床形成温度为170~260℃,成矿深度为0.97~3.04km,属中浅成中低温热液金矿床;含矿石英中H-O同位素和硫化物S同位素共同指示,成矿流体早期以岩浆水(含变质水)为主,晚期混入大量大气降水,成矿物质主要来源于中生代燕山早期岩浆岩,古老变质岩亦有一定贡献;成矿机理主要是沸腾作用和大气降水的混合作用引起流体物理化学性质变化,流体还原性增强,在有利空间沉淀富集形成金矿床。
[Abstract]:The fluid characteristics and material sources of the deposit are studied by observing the petrography of fluid inclusions, micro-temperature measurement, laser Raman and H-O-S isotopic analysis of fluid inclusions in the post Jiaodong gold deposit. The results show that the early ore-forming fluid was the NaCl-H2O-CO2 system with low salinity and low density and rich in CO2, and then gradually evolved into NaCl-H2O system due to boiling action. The formation temperature of the deposit was 170 ~ 260 鈩，

本文编号：2093731