<i>In-situ</i>
                    control of oxygen fugacity for laboratory measurements of electrical conductivity of minerals and rocks in a multi-anvil press

代立东,; 李和平,; 胡海英,; 单双明,

doi:10.1088/1674-1056/20/4/049101

Cited by 8 publications

(6 citation statements)

References 35 publications

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“…In situ high-pressure EC results on minerals and rocks have been published by many previous researchers using this high-pressure apparatus [69][70][71][72][73][74][75][76][77][78][79][80][81][82][83][84][85][86][87]. Dai Lidong and his collaborator [88][89][90][91] have developed the HP-HT electrical conductivity platform of minerals and rocks in HTHPSEI, as shown in Solartron-1260 and Solarton-1296 interface impedance spectroscopy analyzer operating in the two-electrodes configuration for complex EIS measurements in the frequency range 10 À4 Hz-10 7 Hz; and (c) the Vertex-70v vacuum Fourier-transform infrared spectroscopy (FT-IR) analyzer to check the water content of the sample. The influential ingredients include temperature, pressure, frequency, oxygen fugacity, water content, iron content, crystallographic anisotropy, grain boundary state, the content of alkali metallic elements, etc.…”

Section: Yj-3000 T Multi-anvil Pressmentioning

confidence: 99%

Some New Progress in the Experimental Measurements on Electrical Property of Main Minerals in the Upper Mantle at High Temperatures and High Pressures

Dai¹,

Hu²,

He³

et al. 2022

Mineralogy

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In this chapter, we present the recent progress in the experimental studies of the electrical conductivity of dominant nominally anhydrous minerals in the upper mantle of the deep Earth interior, namely, olivine, pyroxene, and garnet. The influences from pressure, oxygen partial pressure, and anisotropic orientation on hydrous and anhydrous electrical conductivities of minerals and rocks have been already explored detailedly. There are two main electric conduction mechanisms in Fe-bearing mantle minerals, for example, small proton and proton hopping conditions, which are well distinguished by the magnitude of activation enthalpy at high temperature and high pressure. Likewise, the conduction mechanisms are efficiently characterized by these obtained positive and negative effects from the oxygen fugacity on electrical conductivities of corresponding dry and wet Fe-bearing silicate minerals at the regions of the upper mantle under conditions of different oxygen partial pressures. On the base of high-pressure laboratory-based conductivity measurements for these nominally anhydrous minerals (e.g., olivine, pyroxene, and garnet), the water content will be estimated within the depth range of the upper mantle. In comprehensive considerations of filed geophysical magnetotelluric results, the electrical conductivity measurements of dominant upper-mantle minerals can thoroughly disclose the distribution, storage state, and migration conduction in the deep Earth interior.

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Section: Yj-3000 T Multi-anvil Pressmentioning

confidence: 99%

Some New Progress in the Experimental Measurements on Electrical Property of Main Minerals in the Upper Mantle at High Temperatures and High Pressures

Dai¹,

Hu²,

He³

et al. 2022

Mineralogy

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“…with the fitting parameters a, b, and c as given by Dai et al (2011) (but converted to SI units) to calculate the oxygen fugacities for the iron-wüstite (IW), Ni-NiO (NNO), and Mo-MoO 2 (MMO) buffers; the formula and factors have been adjusted so that p and f O2 are given in Pa. The factors for quartz-fayalite-magnetite (QFM) buffer are from Ballhaus et al (1994, tab. 2), also adjusted to fit into the general form of Eq.…”

Section: A Electrical Conductivity Formulas and Parametersmentioning

confidence: 99%

Electrical and seismological structure of the martian mantle and the detectability of impact-generated anomalies

Ruedas

Breuer

2021

Icarus

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“…By virtue of the YJ-3000t multi-anvil press, the representative measurement assemblage for measuring the EC of upper-mantle minerals and rocks under controlled oxygen fugacities, using the EIS technique, was designed by Dai and his coworkers [76][77][78], as illustrated in detail in Figure 4. During the EC measurements, the oxygen fugacity of sample chamber can be efficiently monitored and adjusted by changing the selective metallic type in two symmetric disc-shaped metallic electrodes (e.g., Ni, Mo, Re, Fe, etc.…”

Section: Yj-3000t Multi-anvil Pressmentioning

confidence: 99%

An Overview of the Experimental Studies on the Electrical Conductivity of Major Minerals in the Upper Mantle and Transition Zone

Dai

Jiang

et al. 2020

Materials

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In this paper, we present the recent progress in the experimental studies of the electrical conductivity of dominant nominally anhydrous minerals in the upper mantle and mantle transition zone of Earth, namely, olivine, pyroxene, garnet, wadsleyite and ringwoodite. The main influence factors, such as temperature, pressure, water content, oxygen fugacity, and anisotropy are discussed in detail. The dominant conduction mechanisms of Fe-bearing silicate minerals involve the iron-related small polaron with a relatively large activation enthalpy and the hydrogen-related defect with lower activation enthalpy. Specifically, we mainly focus on the variation of oxygen fugacity on the electrical conductivity of anhydrous and hydrous mantle minerals, which exhibit clearly different charge transport processes. In representative temperature and pressure environments, the hydrogen of nominally anhydrous minerals can tremendously enhance the electrical conductivity of the upper mantle and transition zone, and the influence of trace structural water (or hydrogen) is substantial. In combination with the geophysical data of magnetotelluric surveys, the laboratory-based electrical conductivity measurements can provide significant constraints to the water distribution in Earth’s interior.

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In-situ control of oxygen fugacity for laboratory measurements of electrical conductivity of minerals and rocks in a multi-anvil press

Abstract: In-situ control of oxygen fugacity for laboratory measurements of electrical conductivity of minerals and rocks in a multi-anvil press * Dai Li-Dong(代立东) a) , Li He-Ping(李和平) a) † , Hu Hai-Ying(胡海英) a)b) , and Shan Shuang-Ming(单双明) a)

Cited by 8 publications

References 35 publications

Some New Progress in the Experimental Measurements on Electrical Property of Main Minerals in the Upper Mantle at High Temperatures and High Pressures

Some New Progress in the Experimental Measurements on Electrical Property of Main Minerals in the Upper Mantle at High Temperatures and High Pressures

Electrical and seismological structure of the martian mantle and the detectability of impact-generated anomalies

An Overview of the Experimental Studies on the Electrical Conductivity of Major Minerals in the Upper Mantle and Transition Zone

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