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Using syntectonic remagnetizations for fold geometry and vertical axis rotation: the example of the Cévennes border (France)

Abstract : Classical progressive unfolding makes a distinction between pre-folding, post-folding or synfolding magnetization. It yields the direction of magnetization only in the two first cases. To determine the direction of synfolding magnetization, possible different unfolding percentages during remagnetization have to be assumed according to the site. The small circle approach of Surmont et al. not only leads to this direction, but also to the dip value at each site during remagnetization. In the Cévennes area, extensive palaeomagnetic study reveals syntectonic remagnetization enabling the reconstruction of the shape of a fold for the time of the magnetic overprinting as well as analysis of the rotations undergone by some sites after the remagnetization.
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Bernard Henry, Henri Rouvier, Maxime Le Goff. Using syntectonic remagnetizations for fold geometry and vertical axis rotation: the example of the Cévennes border (France). Geophysical Journal International, Oxford University Press (OUP), 2004, 157, pp.1061-1070. ⟨10.1111/j.1365-246X.2004.02277.x⟩. ⟨insu-03600285⟩

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