THE QUARTZ-COESITE TRANSITION
THE QUARTZ-COESITE TRANSITION
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DOI：
10.1029/jz065i002p00749
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发表时间：
1960-01-01
影响因子：
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通讯作者：
ENGLAND, JL
中科院分区：
文献类型：
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作者：
BOYD, FR;ENGLAND, JL
在700° ~ 1700°C的温度范围内，在20 ~ 40千巴的压力范围内，测定了石英-柯石英转变曲线。该曲线的方程为P = 19.5 + 0.0112T，其中P为单位为毫巴，T为单位为摄氏度。测定是用一个内部加热的碳化钨压力容器，利用滑石作为压力介质。本文描述了用砧装置研究石英-柯石英转变的一些实验结果。这些数据与上面引用的测定结果不一致，这种差异被解释为在砧装置中石英柯石英运行中的压力梯度的影响。石英在地下深度小于100公里时不能转化为柯石英，因此柯石英不可能在地壳岩石中形成。
The quartz–coesite transition curve has been determined over the temperature range 700° to 1700°C in the pressure range 20 to 40 kb. The equation for the curve isP= 19.5 + 0.0112T, wherePis in kilobars andTis in degrees centigrade. The determination was made with an internally heated tungsten carbide pressure vessel utilizing talc for a pressure medium. The results of some runs on the quartz–coesite transition with an anvil apparatus are described. These data are in poor agreement with the determination cited above, and the difference is interpreted as an effect of pressure gradients in quartz–coesite runs in the anvil apparatus. Quartz could not invert to coesite in the earth at depths less than about 100 km, and it is therefore unlikely that coesite has formed in crustal rocks.