Estudio experimental sobre la influencia de la geometría inicial con la formación de sistemas con orientaciones preferentes
- Autores: Albert Griera i Artigas
- Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 1, 1, 2000 (Ejemplar dedicado a: V Congreso Geológico de España (Alicante, 10-14 julio 2000)), págs. 61-66
- Idioma: español
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Resumen
Asymmetric structures around rigid objects are commonly used shear sense criteria. It is often assumed that deformation regimes inferred from local kinematic analyses can be safely extrapolated to the crustal scale. However; strain partitioning is an effective process at all scales, and in consequence a kinematic indicator may record a local flow field rather than the bulk deformation. Experimental analogue! models have been carried out to study how initial irregular geometries control the evolution of the structures, and the possible factors that influence the particle rotation. Experimental results show that kinematic indicators only provide information about the local flow, and even in coaxial histories, a pre-boudined layer can give rise to asymmetric structures.
