Encyclopedia of Geomagnetism and Paleomagnetism

2007 Edition
| Editors: David Gubbins, Emilio Herrero-Bervera

Magnetic Susceptibility (MS), Low‐Field

  • Brooks B. Ellwood
Reference work entry
DOI: https://doi.org/10.1007/978-1-4020-4423-6_188

All mineral grains are “susceptible” to become magnetized in the presence of a magnetic field, and MS is an indicator of the strength of this transient magnetism within a material sample. MS is very different from remanent magnetism (RM), the magnetization that accounts for the magnetic polarity of materials. MS in sediments is generally considered to be an indicator of iron, ferromagnesian or clay mineral concentration, and can be quickly and easily measured on small samples. In the very‐low‐inducing magnetic fields that are generally applied, MS is largely a function of the composition, concentration, grain size, and morphology of the magnetizable material in a sample. It is also somewhat variable in direction (MS has anisotropy) according to magnetocrystalline anisotropy, mineral distributions, and grain morphology. MS has the advantage of being quickly and easily measured on small, friable, unoriented samples using commercially available devices such as balanced coil induction...

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© Springer-Verlag 2007

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  • Brooks B. Ellwood

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