东天山康古尔金矿床成矿流体地球化学特征及其来源

• 作 者: 张连昌 姬金生 曾章仁
• 机 构: 西安工程学院
• 出 处: 地球化学
• 发表日期: 1999年01期
• 关键词: 成矿流体 流体包裹体 康古尔金矿床 蚀变岩型金矿 稳定同位素 初始锶 东天山 地球化学特征 变质水 金矿化

新疆康古尔金矿床是分布于晚古生代火山岩区受脆韧性剪切带控制的蚀变岩型金矿。该矿床成矿流体具有中低温度（３２０～１００℃）、中等ＮａＣｌ质量分数（１１４％～１７０％）、弱还原等特征。包裹体气相成分以Ｈ２Ｏ和ＣＯ２为主，液相成分中富Ｎａ＋、Ｃｌ－，而贫Ｋ＋、Ｆ－。成矿流体δＤ为－４５‰～－６６‰，δ１８Ｏ为－８３４‰～２９８‰，（８７Ｓｒ／８６Ｓｒ）ｉ值为０７０７７～０７１０６，反映了成矿流体由变质水、大气降水和岩浆水混合组成的特点

The Kang’guer gold deposit in Xinjiang is an altered rock-type gold deposit controlled by brittle-ductile shear zone distributed in the Late Paleozoic volcanic rocks. The ore-forming fluid has such characteristics as medium-low temperature (320 ~ 100 ℃), moderate NaCl concentration (114% ~ 170%) and weak reduction. The gas inclusions are mainly composed of H2O and CO2, while the liquid components are rich in Na +, Cl- and lean K +, F-. The δD of ore-forming fluid is -45 ‰ ~ -66 ‰, δ18O is -834 ‰ ~ 298 ‰, and (87Sr / 86Sr) i is 07077 ~ 07106, reflecting that the ore-forming fluid is composed of metamorphic water , Atmospheric precipitation and magmatic water mixed composition characteristics