Journal ArticleDOI
Basic magnetic properties of rocks under the effects of mechanical stresses
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TLDR
In this article, the effects of mechanical stresses on the magnetization of the earth's crust can be classified in two categories: (a) the reversible effect which disappears when the stress is removed; and (b) the irreversible effect which causes an irreversible enhancement or an irreversible demagnetization of remanent magnetization.About:
This article is published in Tectonophysics.The article was published on 1970-03-01. It has received 103 citations till now. The article focuses on the topics: Remanence & Magnetization.read more
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Deformation of remanent magnetism in a synthetic-aggregate with hematite
TL;DR: In this paper, a hematite-calcite aggregate, bonded with Portland cement, is deformed triaxially at 200 MPa confining pressure and at a constant strain-rate of 10−5 s−1, in some cases with a pore fluid pressure of 120 MPa.
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Variations of the mean susceptibility of rocks under hydrostatic and non-hydrostatic pressure
TL;DR: In this paper, the variations of the mean susceptibility of basaltic rocks and polycrystalline magnetite, measured in weak magnetic field, under external non-hydrostatic (uniaxial) and hydrostatic pressure, are studied.
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Application of tectonomagnetism to earthquake phenomena
TL;DR: The magnetization of a rock compressed uniaxially by σ whose axis makes an angle θ with the direction of J is proved experimentally and theoretically to be presented by J(θ,σ) = Jo[1− (βσ 4) × (3 cos2θ + 1)], where Jo denotes the magnetisation of the uncompressed rock as discussed by the authors.
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Piezomagnetic field associated with a numerical solution of the Mogi model in a non-uniform elastic medium
Ayako Okubo,Naoto Oshiman +1 more
TL;DR: In this paper, the authors evaluate changes in the geomagnetic field due to the piezomagnetic effect produced by a stress field of dilatation sources represented by numerical solutions in a non-uniform elastic medium.
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Piezomagnetic fields produced by dislocation sources
TL;DR: In this paper, a generalized version of the Green's function was proposed to compute the piezomagnetic field produced by a dislocation surface in an elastic half-space, which is known as the elementary potentials.
References
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The seismomagnetic effect
TL;DR: In this article, the authors calculate local variations in the geomagnetic field, which are produced by stress changes in crustal rocks, from the stress patterns and the piezomagnetic properties of the rocks down to the Curie point isotherm.
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Earthquake Energy, Earthquake Volume, Aftershock Area, and Strength of the Earth's Crust
TL;DR: In this article, the authors deduced the energy of the largest possible earthquake from the spatial distribution of the stress energy within the earth's crust, which was then combined with the magnitude energy relation due to GUTENBERG and RICHTER, yielding a formulaE=6×102×A1·5.
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Effects of Uniaxial Compression on Remanent Magnetization
Mitiyasu Ohnaka,Hajimu Kinoshita +1 more
TL;DR: In this article, the effect of directional stress on the remanent magnetization of magnetite bearing rocks and nickel polycrystallites was investigated and a nearly reversible change in intensity was found when the direction of compression is perpendicular to that of TRM.
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The effect of stress on the susceptibility and magnetization of a partially magnetized multidomain system
TL;DR: In this article, a model for partial magnetization of an isotropic multidomain magnetic system was proposed and the behavior of the model system in response to applied stress was analyzed.
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Theory of the magnetic susceptibility of stressed rock
TL;DR: In this paper, the authors calculated the stress dependence of magnetic susceptibility of igneous rock from the multidomain theory of magnetic grains, assuming that the magnetic mineral is pure magnetite whose saturation magnetization, magnetocrystalline anisotropy and saturation magnetostriction are known.