Acquisition and chemical remagnetization in carbonates: an evaluation by micromagnetic modeling, laboratory simulations and case studies

• Grant number: 21/00861-2
• Support Opportunities: Scholarships in Brazil - Doctorate
• Start date: June 01, 2021
• End date: October 31, 2024
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geophysics
• Principal Investigator: Ricardo Ivan Ferreira da Trindade
• Grantee: Ualisson Donardelli Bellon
• Host Institution: Instituto de Astronomia, Geofísica e Ciências Atmosféricas (IAG). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated research grant: 16/06114-6 - The Neoproterozoic Earth System and the rise of biological complexity, AP.TEM
• Associated scholarship(s): 22/14100-6 - Exploring micromagnetic modelling of highly-detailed three-dimensional finite element meshes: a new pathway to study the properties of remanence carriers in remagnetized carbonates, BE.EP.DR

Abstract

Paleomagnetic data from carbonate rocks is applied in global paleogeographic reconstructions. Although studied from different perspectives, the phenomena responsible for the growth of magnetic particles and chemical remanent acquisition/remagnetization is not fully understood. This work has as innovation to study the growth of secondary magnetic crystals in carbonate rocks of the Neoproterozoic and the distinct magnetic properties of its particles according to its generating mechanism - through a) mineralochemical characterization; b) magnetic characterization; c) sequential extraction experimentation; d) nanometric imaging by synchrotron light emitted by a particle accelerator; and e) micromagnetic modeling of the obtained three-dimensional models. By linking chemical magnetization to the formation of these minerals, it may become possible to date (indirectly), the migration of basinal fluids and the burial of sediments. This project is linked to the thematic project FAPESP 2016/06114-6. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

BELLON, U. D.; TRINDADE, R. I. F.; WILLIAMS, W.. Unmixing of Magnetic Hysteresis Loops Through a Modified Gamma-Cauchy Exponential Model. GEOCHEMISTRY GEOPHYSICS GEOSYSTEMS, v. 24, n. 8, p. 21-pg., 2023-08-01. (21/00861-2, 16/06114-6)