L06-page6 - greater magnetic properties • Soils and other...

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6 Total magnetization Total magnetization: J=J i +J r Effective or apparent k : k e or k a =(J i +J r )/(F/ µ 0 ) Note: a J that is not fully aligned with the natural H field at a site will cause a perturbation in H , and thus H local will have a slightly different direction and strength then the natural field. Magnetic properties of materials of interest Basement: tends to be igneous or metamorphic, thus
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Unformatted text preview: greater magnetic properties. • Soils and other weathered products: because magnetic minerals tend to weather rather rapidly compared to quartz, will get reduction of magnetic materials with weathering. • Man-made objects: iron and steel • Ore deposits: many economic ores are either magnetic, or associated with magnetic minerals....
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