@article{Bidegain_Rico_2004, title={Magnetic mineralogy and susceptibility records in Quaternary sediments of normal (Brunhes) and reverse (Matuyama) polarity in the Juarez quarry, Buenos Aires Province}, volume={59}, url={https://revista.geologica.org.ar/raga/article/view/1427}, abstractNote={<p>Sediments exposed in the Juárez quarry of Buenos Aires Province (34°57’10’’S and 57º53’00’’ W), belong to the Pleistocene and Holocene. The sedimentary units are those of the Ensenada and Buenos Aires formations and the so-called Post-Pampean. The Ensenada Formation has reversed polarity (Matuyama) at the bottom of the exposed sequence and normal polarity (Brunhes) at the upper part, while the Buenos Aires Formation and Post-pampean sediments are of normal polarity (Brunhes). The highest susceptibility values were obtained in loess of the Ensenada Formation (189 x 10<sup>-8</sup> m<sup>3</sup>/kg), and the lowest in sediments belonging to the Buenos Aires Formation (11 x 10<sup>-8</sup> m<sup>3</sup>/kg) and in hydromorphic paleosols of the Ensenada Formation (30 to 50 x 10<sup>-8</sup> m<sup>3</sup>/kg), both associated with climatic conditions of higher relative humidity. An increase in magnetic values in the coarse- to medium-silt fractions reflects the dominance of vigorous winds as the main carrier of ferromagnetic minerals during arid periods (glacial periods). The frequency-dependent susceptibility (F factor) varies between 0 % and 6,45 %. The highest values, obtained in intensively weathered horizons (interglacial periods), are, however, intermediate compared with those of Siberia and China. This property allows us to suggest the existence of a third model of susceptibility behaviour related to changes of Quaternary paleoclimate: that of strong winds modified by pedological processes at middle latitudes.</p>}, number={3}, journal={Revista de la Asociación Geológica Argentina}, author={Bidegain, Juan C. and Rico, Yamile}, year={2004}, month={Sep.}, pages={451-461} }