Estudios paleomagnéticos y de magnetismo de rocas en testigos de sedimento cortos de Laguna Azul, Argentina
Paleomagnetic and rock magnetic studies in short sediment cores from Laguna Azul, Argentina
Romina Achaga1,*, Claudia Susana Gabriela Gogorza1, María Alicia Irurzun1, Avto Goguitchaichvili2
1 Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires (CIFICEN), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Universidad Nacional del Centro de la Provincia de Bs. As. (UNCPBA), Consejo de Investigaciones Científicas (CIC), Pinto 399, Tandil, 7000, Argentina.
2 Laboratorio Interinstitucional de Magnetismo Natural (LIMNA), Instituto de Geofísica, Unidad Michoacán, Campus Morelia, Universidad Nacional Autónoma de México, Antigua Carretera a Pátzcuaro 8701, Ex Hacienda de San José de la Huerta, 58190, Morelia, México.
* Autor para correspondencia: (R. Achaga) This email address is being protected from spambots. You need JavaScript enabled to view it.
How to cite this article:
Achaga, R., Gogorza, C.S.G., Irurzun, M.A., Goguitchaichvili, A., 2024, Estudios paleomagnéticos y de magnetismo de rocas en testigos de sedimento cortos de Laguna azul, Argentina: Boletín de la Sociedad Geológica Mexicana, 76 (3), A200424. http://dx.doi.org/10.18268/BSGM2024v76n3a200424
Manuscript received: October 20, 2023; Corrected manuscript received: March 10, 2024; Manuscript accepted: April 17, 2024.
ABSTRACT
This study presents the first paleomagnetic and rock magnetic results from sediment cores collected in Laguna Azul, located in the Somuncurá Plateau region in Argentina. The main objective is to characterize the magnetic properties of the sediments and provide the first paleomagnetic directional data in this region. The primary magnetic carrier was identified as (titano)magnetite. While radioisotope dating has not yet been obtained, a chronostratigraphic marker from a level rich in organic carbon in is used to estimate the sedimentation rate. The magnetic inclination and magnetic declination results obtained have been compared with global geomagnetic models. The obtained results suggest that Laguna Azul is a potentially valuable site for future paleomagnetic research. Additionally, a preliminary paleoenvironmental analysis was carried out for each sedimentary unit using the rock magnetic and organic matter results.
Keywords: paleomagnetism, rock-magnetism, lake sediments, Somuncurá Plateau.
