Resumen de Caracterización de la signatura magnética del dique de Plasencia mediante la técnica de iluminación artificial del vuelo aeromagnético de la España peninsular.
María Luisa Osete López, Ramón Vegas Martínez, René Efraín Chávez Segura, M. Carmen Hernández Lucendo
Artificial illumination technique has been applied to a qualitative interpretation of a region of the aeromagnetic survey of Spanish mainland. The investigated region corresponds to a 295 x 190 km rectangle oriented N54.5'-'E which includes the Spanish segment of the Plasencia Dike. Four magnetic structures has been recognized and tentatively correlated to geological structures. The main lineament (L1) exhibit a N50E mean trend which has been associated with the Plasencia Dike. The magnetic anomaly produced by this structure presents a continuous character, although it shows lower intensity w here the dike is not outcroping. The s e c o n d ob serv ed m agnetic lineam ent (L2) presents a N S orientation, matching on surface with the Herradon fault and with La Cañada metamorphic outcrop. A third group of magnetic lineaments exhibits a E-W direction (R). These anomalies could correspond to vertical shear zones described in literature. The latest anomalies are cutand displaced by NE-SW trending structures (F) which could be correlated to the NNE-SSW Alba-Villoria fault and to the ENE-WSW Salamanca fault system
