Anisotropy of synthetic quartz electrical conductivity at high pressure and temperature

	Anisotropy of synthetic quartz electrical conductivity at high pressure and temperature
	Duojun Wang; Heping Li; Li Yi; Takuya Matsuzaki; Takashi Yoshino
通讯作者	Heping Li
	2010
发表期刊	Journal of Geophysical Research: Solid Earth
卷号	115 期号:B9 页码:B09211-
摘要	AC measurements of the electrical conductivity of synthetic quartz along various orientations were made between 0.1 and 1 MHz, at similar to 855 similar to 1601 K and at 1.0 GPa. In addition, the electrical conductivity of quartz along the c axis has been studied at 1.0-3.0 GPa. The impedance arcs representing bulk conductivity occur in the frequency range of 10(3)-10(6) Hz, and the electrical responses of the interface between the sample and the electrode occur in the 0.1 similar to 10(3) Hz range. The pressure has a weak effect on the electrical conductivity. The electrical conductivity experiences no abrupt change near the alpha - beta phase transition point. The electrical conductivity of quartz is highly anisotropic; the electrical conductivity along the c axis is strongest and several orders of magnitude larger than in other directions. The activation enthalpies along various orientations are determined to be 0.6 and 1.2 eV orders of magnitude, respectively. The interpretation of the former is based on the contribution of alkali ions, while the latter effect is attributed to additional unassociated aluminum ions. Comparison of determined anisotropic conductivity of quartz determined with those from field geophysical models shows that the quartz may potentially provide explanations for the behavior of electrical conductivity of anisotropy in the crust that are inferred from the transverse magnetic mode.
学科领域	地球深部物质与流体作用地球化学
收录类别	SCI
语种	英语
文献类型	期刊论文
条目标识符	http://ir.gyig.ac.cn/handle/352002/4957
专题	地球内部物质高温高压实验室_地球内部物质高温高压实验室_期刊论文
通讯作者	Heping Li
推荐引用方式 GB/T 7714	Duojun Wang,Heping Li,Li Yi,et al. Anisotropy of synthetic quartz electrical conductivity at high pressure and temperature[J]. Journal of Geophysical Research: Solid Earth,2010,115(B9):B09211-.
APA	Duojun Wang,Heping Li,Li Yi,Takuya Matsuzaki,&Takashi Yoshino.(2010).Anisotropy of synthetic quartz electrical conductivity at high pressure and temperature.Journal of Geophysical Research: Solid Earth,115(B9),B09211-.
MLA	Duojun Wang,et al."Anisotropy of synthetic quartz electrical conductivity at high pressure and temperature".Journal of Geophysical Research: Solid Earth 115.B9(2010):B09211-.

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