000118125 001__ 118125
000118125 005__ 20220908140458.0
000118125 0247_ $$2doi$$a10.1007/s11200-017-0143-6
000118125 0248_ $$2sideral$$a105452
000118125 037__ $$aART-2018-105452
000118125 041__ $$aeng
000118125 100__ $$0(orcid)0000-0003-1563-6434$$aOliva-Urcia, Belén
000118125 245__ $$aNew insights into asymmetric folding by means of the anisotropy of magnetic susceptibility, Variscan and Pyrenean folds (SW Pyrenees)
000118125 260__ $$c2018
000118125 5060_ $$aAccess copy available to the general public$$fUnrestricted
000118125 5203_ $$aMagnetic fabric allows to unravel the petrofabric of sedimentary rocks and to assess their deformational history. The use of this technique, in addition to classical structural field observations in the limbs of seven asymmetric folds in the Pyrenees, helps to determine the differences of internal deformation as well as the folding kinematics. Three folds developed during the Variscan Orogeny in Ordovician and Devonian rocks, and four folds developed during the Pyrenean Orogeny in Eocene rocks, are studied. Folds show a variety of structural locations, in different thrust sheets of the Southern Central Pyrenees, different cleavage development, age, geometry and lithology. Sampling follows an equivalent lithological layer in the two limbs, except for one case, of the selected folds. Results show a modified tectonic magnetic fabric in most sites with the magnetic lineation on the tectonic foliation plane. A larger scattering of the magnetic lineation (maximum magnetic anisotropy axis) and a higher intensity of the preferred orientation of minerals (eccentricity of the anisotropy of magnetic susceptibility - AMS ellipsoid) is better observed in the overturned (short) limb of the asymmetric Variscan folds than in the normal (long) limb. On the other hand, the shape parameter in Alpine folds is generally larger in the overturned (short) limb respect to the normal (long) one. A good clustering of the minimum magnetic anisotropy axes is observed in all limbs. The combination of the AMS data with the structural data helps to understand and better constrain the deformation degree in these asymmetric folds and to unravel the deformational history.
000118125 540__ $$9info:eu-repo/semantics/openAccess$$aAll rights reserved$$uhttp://www.europeana.eu/rights/rr-f/
000118125 590__ $$a1.293$$b2018
000118125 591__ $$aGEOCHEMISTRY & GEOPHYSICS$$b59 / 84 = 0.702$$c2018$$dQ3$$eT3
000118125 592__ $$a0.532$$b2018
000118125 593__ $$aGeophysics$$c2018$$dQ2
000118125 593__ $$aGeochemistry and Petrology$$c2018$$dQ2
000118125 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/acceptedVersion
000118125 700__ $$aGil-Peña, Inma
000118125 700__ $$0(orcid)0000-0002-1929-8850$$aSoto, Ruth
000118125 700__ $$aSamsó, José María
000118125 700__ $$aAntolín, Borja
000118125 700__ $$0(orcid)0000-0002-0504-2352$$aPueyo, Emilio L.$$uUniversidad de Zaragoza
000118125 7102_ $$12000$$2428$$aUniversidad de Zaragoza$$bDpto. Ciencias de la Tierra$$cÁrea Geodinámica Interna
000118125 773__ $$g62 (2018), 291-322$$pStud. geophys. geod.$$tSTUDIA GEOPHYSICA ET GEODAETICA$$x0039-3169
000118125 8564_ $$s1827950$$uhttps://zaguan.unizar.es/record/118125/files/texto_completo.pdf$$yPostprint
000118125 8564_ $$s1925231$$uhttps://zaguan.unizar.es/record/118125/files/texto_completo.jpg?subformat=icon$$xicon$$yPostprint
000118125 909CO $$ooai:zaguan.unizar.es:118125$$particulos$$pdriver
000118125 951__ $$a2022-09-08-11:33:02
000118125 980__ $$aARTICLE