摘要
水是所有地质体系中最活泼的成分，对矿物和熔体的物理性质会产生重大影响，在整个地球演化中也起着关键作用。目前有关水的精确热力学数据们局限在压力1．0GPa和温度900℃。本文利用超高压差热分析和超声波振幅分析方法获得了1．5～5．0GPa压力下冰－水平衡的p－t数据，并发现在3．0GPa可能存在另一个三相点，并且在压力＞2．0GPa时的冰-水转换的超声波振幅变化有两个突变点，这与压力＞2．0GPa时的升温和降温差热曲线大都存在两个峰相一致。这很可能是一种新现象，值得进一步研究。
Water is the most active component in all geological systems. It exerts an important effect on the physical properties of minerals and melts. It also plays a key role in the evolution of theFarth. Accurate thermodynamic data for water are currently confined to press ures below 1.0 GPaand temperature below 900℃ . In this paper new data are reported on the p-t properties of water atpressures up to 5.0 Gpa by using differential thermal analysis (DTA ) and ultrasonic amplitudeanalysis. It found that another ternary point may exist at 3.0 GPa and the ultrasonic amplitudechange of ice-water transition shows two inflection points above 2.0 GPa, consistent with the twopeaks of most heating and cooling differential thermal curves above 2.0 GPa. It may be a new phe-nomenon which needs further study.
出处
《矿物学报》
CAS
CSCD
北大核心
1996年第4期431-435,共5页
Acta Mineralogica Sinica
基金
国家自然科学基金!49374209
中国科学院院长特别基金
关键词
冰
水
平衡实验
压力
ice-water equilibrium
high pressure differential thermal analysis
ultrasonic amplitude analysis
