Magnetic fabrics in cleaved marls and their link to deformation processes (Southern Pyrenees, Spain)
作者： J. C. Larrasoaña , A. M. Schleicher , J. M. Parés , P. Mata , A. Gil
关键词: Paramagnetism 、 Cleavage (geology) 、 Deformation (mechanics) 、 Marl 、 Carbonate rock 、 Magnetite 、 Lineation 、 Geology 、 Mineralogy 、 Perpendicular
摘要: RT-AMS ellipsoids from Upper Cretaceous carbonate rocks in the Southwestern Pyreneesexhibit an unusual orientation for within a well-cleavage domain: neither do all sites show themaximum axes intersection lineation nor are minimum at pole of cleavage plane.The study subfabrics (LT-AMS and AARM) indicates that paramagnetic grains (phyllosilicates)respond to layer parallel shortening, with axis perpendicular S0. On otherhand, ferromagnetic (magnetite) orient relation strain field, which also producesthe domain. The maximum have horizontal NNE-SSWdirection. An extended version this paper is published Oliva-Urcia et al. (2009).
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