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方解石矿物包裹体中水的氢同位素组成在线测试方法
投稿时间:2019-01-29  修订日期:2019-09-29  点此下载全文
引用本文:金贵善,刘汉彬,韩娟,李军杰,张建锋,张佳,石晓.2020.方解石矿物包裹体中水的氢同位素组成在线测试方法[J].地质论评,(1):255-261,[DOI]:.
JIN Guishan,LIU Hanbin,HAN Juan,LI Junjie,ZHANG Jianfeng,ZHANG Jia,SHI Xiao.2020.An on line method for determination of hydrogen isotope ratios in water from fluid inclusions of calcite mineral[J].Geological Review,(1):255-261.
DOI:10.16509/j.georeview.2020.01.019
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作者单位E-mail
金贵善 核工业北京地质研究院北京100029 Email: 16626162@qq.com 
刘汉彬 核工业北京地质研究院北京100029 Email: hanbinliu@sina.com 
韩娟 核工业北京地质研究院北京100029  
李军杰 核工业北京地质研究院北京100029  
张建锋 核工业北京地质研究院北京100029  
张佳 核工业北京地质研究院北京100029  
石晓 核工业北京地质研究院北京100029  
基金项目:注: 本文为国家重点研发计划项目“华南热液型铀矿基地深部探测技术示范”(编号:2017YFC0602600)的成果
中文摘要:水是矿物流体包裹体的重要组成,承载着流体性质和演化信息。提取矿物包裹体中水的方法主要有真空破碎法及爆裂法。为了减少真空破碎法表面积增大引起水的吸附以及爆裂法在高温下发生同位素交换反应,本文自制了一个在线提取装置,以高纯He作为载气,与高温裂解装置—稳定同位素质谱仪(EA/HT IRMS)相连,进行一系列的条件实验,确认了方解石矿物包裹体中水的氢同位素组成在线测试的关键技术参数。实验证实,当爆裂温度为420 ℃、爆裂时间为5 min、含水量为01~03 μL时,利用在线提取装置—EA/HT IRMS对方解石矿物包裹体中水的δD进行测试的精密度优于±15‰(1σ)。相对于传统离线分析方法,本方法实现方解石矿物包裹体中水的在线提取及氢同位素组成的在线测试,简化了操作流程,并提高实验测试效率。
中文关键词:方解石  流体包裹体  在线测试  爆裂法  水中氢同位素组成
 
An on line method for determination of hydrogen isotope ratios in water from fluid inclusions of calcite mineral
NameInstitution
JIN GuishanBeijing Research Institute of Uranium Geology, Beijing, 100029
LIU HanbinBeijing Research Institute of Uranium Geology, Beijing, 100029
HAN JuanBeijing Research Institute of Uranium Geology, Beijing, 100029
LI JunjieBeijing Research Institute of Uranium Geology, Beijing, 100029
ZHANG JianfengBeijing Research Institute of Uranium Geology, Beijing, 100029
ZHANG JiaBeijing Research Institute of Uranium Geology, Beijing, 100029
SHI XiaoBeijing Research Institute of Uranium Geology, Beijing, 100029
Abstract:Objectives: Water is an important component of fluid system carrying information on the nature and evolution of fluid. Water is usually extracted from fluid inclusions by mechanical vacuum crushing technique and thermal decrepitation. An on line extraction device was invented to reduce water adsorption of surface increasing by vacuum crushing and isotope exchange reaction by thermal decrepitation and measure δD in water from calcite mineral inclusions.Methods: The on line extraction device was connected with thermal decrepitation elemental analyzer plus isotope ratio mass spectrometry in pure helium. The key technical parameters of hydrogen isotope composition in Water from Fluid Inclusion of Calcite mineral were confirmed by carrying out a series of conditional experiments.Results: After a series of conditional experiments, the parameters are optimized with the 420℃ reactor temperature, 5 min cracking reaction time, 0.1~0.3 μL water content of mineral inclusions. The precision of δD in water from calcite mineral inclusions is better than ±1.5‰ (1σ).Conclusions: The method can be used to extract water from calcite mineral fluid inclusion online and measure the hydrogen isotope composition online, which simplifies the operation process and improves the efficiency.
keywords:calcite  fluid inclusion  on line measurement  thermal decrepitation  hydrogen isotope composition of water
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