2026-06-10T14:22:17Zhttps://riubu.ubu.es/oai/request

oai:riubu.ubu.es:10259/90292024-04-25T00:05:17Zcom_10259_9025com_10259_5086com_10259_2604com_10259.4_2560col_10259_9026col_10259.4_2561

Estudio de las propiedades magnéticas en las terrazas del río Tajo: implicaciones paleoambientales Magnetic properties studies of Tajo river terraces: palaeoenvironmental implications Bógalo Román, Mª Felicidad Keller, P. Pérez González, Alfredo Gallardo, J. Osete López, María Luisa Rock magnetic properties Palaeoenvironment Pleistocene Soils Física Magnetismo Geología Physics Magnetism Geology Soil profiles from 12 terraces of Plio-Pleistocene to Holocene age from the Tajo river in Central Spain were investigated on there rock magnetic properties. Systematic profiles were sampled in O. 1 m intervals from 24 fresh trenches of 2.5m depth. The soil profiles consist of an upper eluvial horizon (A, E), a intermediate illuvial horizon (B), and sometimes a lower horizon (C). Low and high frequency susceptibility (x), saturation IRM (SIRM), and anhysteretic remanent magnetization (ARM) measurements were performed out. The differences between the stable values of horizon B and the high values of the horizons A and E increase with the age of the soils. Comparison of the mean values of the B horizons for each terrace show low X values for the Holocene and the Late Pleistocene, a strong x increase during the Middle Pleistocene, and again low values for the Pliocene and Early Pleistocene. Magnetic parameters of soils show the palaeoenvironmental changes during this period of time. Este trabajo ha sido financiado por el proyecto de la CE, CHRX-CT93-0315. 2024-04-24T10:16:27Z 2024-04-24T10:16:27Z 1996 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 0213-683X http://hdl.handle.net/10259/9029 spa Geogaceta. 1996, n. 20, p. 1062-1065 https://sociedadgeologica.org/publicaciones/geogaceta/geogaceta-20-1996/ info:eu-repo/semantics/openAccess application/pdf Sociedad Geológica de España