Gravimetry and gamma-ray spectrometry of the Araguainha impact crater

• Grant number: 16/16021-5
• Support Opportunities: Regular Research Grants
• Start date: July 01, 2017
• End date: June 30, 2019
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geophysics
• Principal Investigator: Emilson Pereira Leite
• Grantee: Emilson Pereira Leite
• Host Institution: Instituto de Geociências (IG). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated researchers: Alvaro Penteado Crósta ; Marcos Alberto Rodrigues Vasconcelos

Abstract

A gravimetric and gamma-ray spectrometric study of the Araguainha impact structure is proposed. The study will consist of the processing and the geological interpretation of ground gravity and gamma-ray data to be collected during the project. It is intended to characterize the gravity anomalies of the area and to develop three-dimensional models of the distribution of mass density in the subsurface. These models should reflect the lithological contacts and the deep structures, contributing to the understanding of the geologic evolution of this impact structure. The gamma-ray spectrometric data will provide maps of the concentrations of the radioactive elements U-238, Th-232 and K-40, as well as some products such as maps of the ratios between the elements and anomalous potassium that, when interpreted in conjunction with published petrographic informations, may reveal the presence of hydrothermal alteration zones associated with the crater formation. The results of both methods will be interpreted together in the light of the geological knowledge of the crater. (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)

LEITE, EMILSON P.; LAMBERT, JOHANN; VASCONCELOS, MARCOS ALBERTO R.; CROSTA, ALVARO P.; BATEZELLI, ALESSANDRO. Gamma-ray spectrometry of the Araguainha impact structure, Brazil: Additional insights into element mobilization due to hydrothermal alteration. Anais da Academia Brasileira de Ciências, v. 94, n. 3, p. 16-pg., 2022-01-01. (16/16021-5)

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)