The Ivrea Zone as a model for the distribution of magnetization in the continental crust
作者： Peter Wasilewski , David M. Fountain
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摘要: Magnetic properties of the principal lithologies Ivrea Zone northern Italy have been measured. Maficultramafic granulite facies rocks and amphibolites from granulite-amphibolite transition zone are highly magnetic with susceptibilities greater than 0.5 × 10−3 (cgs) saturation magnetization values ∽ 90 emu/cm³ Curie points between 570° 580°C. The phase is magnetite. All other moderately to weakly magnetic. mafic granulites thick laterally continuous and, thus, would make an appropriate deep crustal source for long wavelength anomalies in regions typified by low average geothermal gradients.
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