安山质玻璃中水的扩散实验  

Diffusion Experiment of Water in Andesitic Glasses

作　　者：汪立今[1] 倪怀伟 

机构地区：[1]新疆大学资源与环境科学学院 [2]Department of Geological Sciences University of Michigan,Ann Arbor,MI 48109,USA

出　　处：《岩矿测试》2006年第2期119-121,共3页Rock and Mineral Analysis

基　　金：国家教育部"春晖"计划基金项目(040123);新疆维吾尔自治区重点建设学科"矿产普查及勘探"基金项目

摘　　要：在CSV(Cold-Seal-Vessel)高压设备中,设置温度550℃、压力0．1 GPa、放置240 h 的条件下,进行了安山质玻璃中水的扩散实验,利用傅立叶红外光谱仪测定了安山质玻璃中 OH、H2Om和H2Ot的含量,而后通过定量计算和计算机处理,获得了水在安山质玻璃中的扩散曲线。为研究水在安山质玻璃中的扩散规律以及火山喷发机理和成因提供了依据。Dissolved H2O in silicate melts and glasses and affects glass properties and magma evolution. basalts and the significant constituent of the gases plays a crucial role in volcanic eruption on terrestrial planets Water is also the most abundant volatile component in terrestrial that escape from Andesitic magma. of water in Andesitic melts is important for understanding the degassing of Andesitic Knowledge of the diffusivity magma and for assessing the fractionation of volatiles during degassing. Andesites are one of the most common magma types and may be widespread on Mars. Water is typically the most abundant dissolved volatile in these magmas. In this paper, the measurements of diffusivity of water in Andesitic glasses were carried out. The experimental condition was set at 550℃, 0.1 GPa （1 kb） and reaction time of 240 hours in Cold-Seal-Vessel （CSV）. Fourier transform-infrared （FFIR） spectrometer was used quantitative calculation glasses were obtained. ter in Andesitic glasses to determine the contents of OH, H2Om and H2Ot in the Andesitic glasses. Through the and computer processing of the experimental data, the diffusion curves of water in Andesitic The results of the experiments provide the basis for the studies on diffusion regularity of waand the formation causes and mechanism of volcanic eruption.

关 键 词：水 安山质玻璃 扩散实验 傅立叶变换红外光谱法 

分 类 号：O645.14[理学—物理化学] O657.33[理学—化学]