| 内蒙古金厂沟梁金矿床成矿流体特征及稳定同位素研究 |
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| 引用本文： | 孙珍军,李学源,于赫楠,孙国胜,朱继浩,陆丽娜,薛怀宇,苏蓉.内蒙古金厂沟梁金矿床成矿流体特征及稳定同位素研究[J].世界地质,2014,33(3):591-602. |
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| 作者姓名： | 孙珍军 李学源 于赫楠 孙国胜 朱继浩 陆丽娜 薛怀宇 苏蓉 |
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| 作者单位： | 1. 防灾科技学院 地震科学系，北京 101601; 2. 内蒙古矿业开发有限责任公司，呼和浩特 010010; 3. 吉林大学 地球科学学院，长春 130061; 4. 国家海洋局第二海洋研究所 海底科学重点实验室，杭州 310012 |
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| 摘 要： | 对金厂沟梁金矿床含金石英脉中流体包裹体进行了岩相学、显微测温、单个包裹体的激光拉曼测试以及O和S同位素组成等方面研究。结果表明,成矿流体气相成分主要为H2O,属H2O-NaCl体系,包裹体均一温度为148.7℃~352℃,盐度w(NaCl)/%]为1.05%~5.99%。δ18O值为-1.1‰~3.0‰,说明成矿流体继承了变质流体的特征,仍以岩浆水和后期大气降水为主;δ34SV-CDT组成为0.6‰~4.3‰,平均值0.817‰,极差为3.1‰,表明成矿流体中的硫主要来自于幔源,其次为围岩。综合分析认为,金厂沟梁金矿床是在燕山晚期太平洋板块俯冲导致岩石圈的快速减薄、拆沉的拉张环境下形成的浅成造山型金矿。
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| 关 键 词： | 流体包裹体 激光拉曼测试 稳定同位素 金厂沟梁 内蒙古 |
Characteristics of ore- forming fluid and stable isotope from Jinchanggouliang gold deposit in Inner Mongolia |
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| SUN Zhen-Jun,LI Xue-Yuan,XU He-Nan,SUN Guo-Sheng,ZHU Ji-Hao,LU Li-Na,XUE Huai-Yu,SU Rong.Characteristics of ore- forming fluid and stable isotope from Jinchanggouliang gold deposit in Inner Mongolia[J].World Geology,2014,33(3):591-602. |
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| Authors: | SUN Zhen-Jun LI Xue-Yuan XU He-Nan SUN Guo-Sheng ZHU Ji-Hao LU Li-Na XUE Huai-Yu SU Rong |
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| Institution: | 1. Department of Earthquake Science，Institute of Disaster Prevention，Beijing 101601，China; 2. Inner Mongolia Mining Development Co． ，Ltd，Huhehaote 010010，China; 3. College of Earth Sciences，Jilin University，Changchun 130061，China; 4. Key Laboratory of Submarine Geosciences，Second Institute of Oceanography，State Oceanic Administration， Hangzhou 310012，China |
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| Abstract: | The authors studied the petrography and microthermometry on fluid inclusions from auriferous quartz in Jinchanggouliang gold deposit，including laser Ｒaman microspectroscopic and oxygen isotope as well as sulphur isotope analyses，etc． The results show that the gas phase of ore- forming fluid is mainly composed of H 2 O， belonging to H 2 O- NaCl system． The fluid inclusion homogenization temperatures range from 148. 7℃ to 352℃， and the salinities are between 1. 05% －5. 99%． The values of δ 18 O vary from －1. 1‰ to 3. 0‰，which indicates that ore- forming fluid inherits the characteristics of metamorphic fluid，while is still mainly dominated by the mag- matic water and meteoric waters added in later stage． The δ 34 S V － CDT ranges 0. 6‰ to 4. 3‰ in composition， with the mean as 0. 817‰，and range as 3. 1‰，indicating the sulfur in ore- forming fluid mainly came from the mantle source，and secondly from the surrounding rocks． In sum，the Jinchanggouliang gold deposit is a shallow orogenic gold deposit formed in the extensional environment caused by Pacific Plate''s subduction leading to rapid thinning of the lithosphere and delamination in the late Yanshanian period． |
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| Keywords: | fluid inclusion laser Ｒaman testing stable isotope Jinchangouliang gold deposit Inner Mon- golia |
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