Comparative tectonic analysis of fold-and-thrust belts

• Grant number: 23/16838-5
• Support Opportunities: Regular Research Grants
• Start date: October 01, 2024
• End date: September 30, 2026
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Ginaldo Ademar da Cruz Campanha
• Grantee: Ginaldo Ademar da Cruz Campanha
• Host Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated researchers: Frederico Meira Faleiros ; Henrique Chaves Joncew ; Mauricio Parra Amézquita ; Oskar Vidal Royo
• Associated scholarship(s): 24/15682-4 - Geometry, deformation and thermokinematic history of Itapirapuã Shear zone, Ribeira belt, Brazil, BP.IC

Abstract

The main scope of this proposal is to compare Phanerozoic fold-and-thrust belts with their Proterozoic equivalents in terms of their deformational styles and regimes. The study will be carried out through the construction of geological cross-sections orthogonal to the structures, geometrically controlled, balanced and restorable, based on field surveys, existing geological cartography and seismic data when available. U-Pb geochronological data will also be carried out on detrital and igneous zircons, aiming to elucidate any stratigraphic doubts, and thermochronological studies using fission traces and (U-Th)/He, in order to establish tectonic and exhumation ates of the massifs. Three cases of fold-and-thrust belts with different ages and geological contexts will be analysed: 1) The southern Espinhaço thrust front; 2) the Maranhão fold-and-thrust belt, in the Peruvian Andes; and 3) the Itaiacoca belt of the Southern Ribeira Belt. (AU)