Numerical and geophysical modeling of Brazilian impact structures

• Grant number: 12/04191-2
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• Start date: July 01, 2012
• End date: July 05, 2014
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geophysics
• Principal Investigator: Alvaro Penteado Crósta
• Grantee: Marcos Alberto Rodrigues Vasconcelos
• Host Institution: Instituto de Geociências (IG). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated scholarship(s): 12/19726-9 - Numerical modelling of Brazilian impact structures, BE.EP.PD

Abstract

The formation of impact craters is known as one of the fastest geological processes on Earth. Its rarity, combined with its speed and scale, prevents the actual observation of such event, which leads to the generation of mathematical models capable of expressing the deformation undergone by the target rocks. In this sense the program ISALE (Simplified Arbitrary Lagrangian Eulerian) was developed by several international researchers in order to understand the process of formation of these structures based on physical and geological information pre-existing.Only six impact structures have been diagnosed in Brazil: Araguainha (MT-GO), Vargeão (SC), Serra Cangalha (TO), Riachão (MA), Vista Alegre (PR) and Cerro Jarau (RS), and other structures that are potential impact craters, such as Santa Marta/PI. From the geological knowledge of these craters that have been accumulated by the research group which the proposer join, this project aims to carry out the numerical modeling for the structures of Araguainha, Riachão, Vargeão by using the program iSALE-2D. For the structure of the Serra Cangalha models will be matched by using the program iSALE-3D in order to complement the 2D analysis already performed in the proposer's PhD thesis. Finally, this project proposes to carry out the gravimetric and magnetic modeling for the Santa Marta structure in order to provide geophysical subsidies that contribute to the understanding of its origin.

Scientific publications

(5)

(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)

GONCALVES DE OLIVEIRA, GRACE JULIANA; CARRARI CHAMANI, MARLEI ANTONIO; GOES, ANA MARIA; CROSTA, ALVARO PENTEADO; RODRIGUES VASCONCELOS, MARCOS ALBERTO; REIMOLD, WOLF UWE. Geological investigation of the central portion of the Santa Marta impact structure, Piaui State, Brazil. BRAZILIAN JOURNAL OF GEOLOGY, v. 47, n. 4, p. 673-692, OCT-DEC 2017. (12/04191-2)

MIYAZAKI, MARCELLE R.; LEITE, EMILSON P.; VASCONCELOS, MARCOS A. R.; WUNNEMANN, KAI; CROSTA, ALVARO P.. ouguer anomaly inversion and hydrocode modeling of the central uplift of the Araguainha impact structur. Anais da Academia Brasileira de Ciências, v. 93, n. 4, 2021. (12/04191-2, 16/16021-5, 12/19726-9)

GONCALVES DE OLIVEIRA, GRACE JULIANA; RODRIGUES VASCONCELOS, MARCOS ALBERTO; CROSTA, ALVARO PENTEADO; REIMOLD, WOLF UWE; GOES, ANA MARIA; KOWITZ, ASTRID. Shatter cones and planar deformation features confirm Santa Marta in Piaui State, Brazil, as an impact structure. METEORITICS & PLANETARY SCIENCE, v. 49, n. 10, p. 1915-1928, OCT 2014. (12/04191-2)

GONCALVES DE OLIVEIRA, GRACE JULIANA; CARRARI CHAMANI, MARLEI ANTONIO; GOES, ANA MARIA; CROSTA, ALVARO PENTEADO; RODRIGUES VASCONCELOS, MARCOS ALBERTO; REIMOLD, WOLF UWE. Geological investigation of the central portion of the Santa Marta impact structure, Piaui State, Brazil. BRAZILIAN JOURNAL OF GEOLOGY, v. 47, n. 4, p. 20-pg., 2017-10-01. (12/04191-2)

GRACE JULIANA GONÇALVES DE OLIVEIRA; MARLEI ANTÔNIO CARRARI CHAMANI; ANA MARIA GÓES; ALVARO PENTEADO CRÓSTA; MARCOS ALBERTO RODRIGUES VASCONCELOS; WOLF UWE REIMOLD. Investigação geológica na porção central da estrutura de impacto meteorítico Santa Marta, Estado do Piauí, Brasil. BRAZILIAN JOURNAL OF GEOLOGY, v. 47, n. 4, p. 673-692, 2017-12-00. (12/04191-2)