本文選題：流體包裹體 + H-O-S同位素��； 參考：《地質(zhì)科技情報》2017年06期

【摘要】：通過對膠東山后金礦流體包裹體巖相學觀察、顯微測溫和激光拉曼以及H-O-S同位素分析,研究了該礦床流體特征和物質(zhì)來源。研究表明成礦流體早期為低鹽度、低密度富CO_2的NaCl-H_2O-CO_2體系,之后由于沸騰作用逐漸演化成NaCl-H_2O體系,礦床形成溫度為170~260℃,成礦深度為0.97~3.04km,屬中淺成中低溫熱液金礦床;含礦石英中H-O同位素和硫化物S同位素共同指示,成礦流體早期以巖漿水(含變質(zhì)水)為主,晚期混入大量大氣降水,成礦物質(zhì)主要來源于中生代燕山早期巖漿巖,古老變質(zhì)巖亦有一定貢獻;成礦機理主要是沸騰作用和大氣降水的混合作用引起流體物理化學性質(zhì)變化,流體還原性增強,在有利空間沉淀富集形成金礦床。
[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，

本文編號：2093731