40Ar/39Ar and (U-Th)/He geochronology in supergene minerals and geomorphological evolution in the southeast of the Goiás State

• Grant number: 17/23577-2
• Support Opportunities: Regular Research Grants
• Start date: June 01, 2018
• End date: November 30, 2020
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Physical Geography
• Principal Investigator: Fabiano Tomazini da Conceição
• Grantee: Fabiano Tomazini da Conceição
• Host Institution: Instituto de Geociências e Ciências Exatas (IGCE). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil

Abstract

The combination of different geochronological methods associated to supergene minerals provides advances in the paleoclimate studies and landscape evolution rates. Thus, the aim of this work is to study the geomorphological evolution in the southeast of the Goiás State, between the cities of Caldas Novas and Rio Quente, using two geochronological methods, 40Ar/39Ar in manganese oxides and (U-Th)/H in Goethites, since in the study area there are expositions of these supergene minerals in different topographic levels. The use of these methods will indicate the time interval required for the denudation in the past climatic conditions and will allow comparing the results obtained at the same level and along different topographic levels. In addition, this work will respond if the duration of the weathering process was continuous or episodic over geological time and provide additional information about the weathering history, paleoclimate and erosivity of the region during the Cenozoic. (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)

CONCEICAO, FABIANO T. DA; VASCONCELOS, PAULO M.; GODOY, LETICIA H.; NAVARRO, GUILLERMO R. B.; MONTIBELLER, CIBELE C.; SARDINHA, DIEGO S.. Water/rock interactions, chemical weathering and erosion, and supergene enrichment in the Tapira and Catala & SIM;o I alkaline-carbonatite complexes, Brazil. JOURNAL OF GEOCHEMICAL EXPLORATION, v. 237, p. 17-pg., 2022-06-01. (17/23577-2)

MONTEIRO, H. S.; VASCONCELOS, P. M.; FARLEY, K. A.; MELLO, C. L.; CONCEICAO, F. T.. Long-term vegetation-induced goethite and hematite dissolution-reprecipitation along the Brazilian Atlantic margin. PALAEOGEOGRAPHY PALAEOCLIMATOLOGY PALAEOECOLOGY, v. 601, p. 18-pg., 2022-07-09. (17/23577-2, 18/00102-1)