Hydrogeochemistry and isotopic hydrology of the Serra Geral Aquifer groundwaters in São Paulo State

• Grant number: 12/00241-5
• Support Opportunities: Regular Research Grants
• Duration: June 01, 2012 - May 31, 2014
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geology
• Principal Investigator: Didier Gastmans
• Grantee: Didier Gastmans
• Host Institution: Centro de Estudos Ambientais (CEA). Universidade Estadual Paulista (UNESP). Campus de Rio Claro. Rio Claro , SP, Brazil
• Associated researchers: Amauri Antonio Menegário ; Chang Hung Kiang

Abstract

Aquifers hosted in basaltic rocks represent an important source for groundwater supply in several parts of the world, mainly due the low salinity of their waters and the amount of water stored, function of the regional extension of the volcanic lava flows reachs and their thickness. In Brazilian territory an important magmatic event took place during the early Mesozoic period in the Paraná Sedimentary Basin, represented by the basalts of the Serra Geral Formation, which constitutes an important aquifer in its occurrence area. In the western portion of São Paulo state Serra Geral Aquifer (SGA) is responsible by the water supply in several cities located over this unit. The main purpose of this project is to study the hidrochemistry and isotopic composition of the SGA groundwater's in the São Paulo state, with the aim to set up a geochemical model for the chemical reactions which occur in the aquifer due the interaction water-rock, which are responsible by the hidrochemical characteristics of these groundwater, as well evaluate the past recharge conditions by the isotopic content variations. This research project encompasses groundwater chemical and isotopic analysis, as well petrographic and mineralogical studies of the basalts. Classical methods to interpret chemical and isotopic data from groundwater will be employed, as statistical and graphic methods. Speciation and geochemical modeling will be achieved using specific software. (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)

GASTMANS, DIDIER; HUTCHEON, IAN; MENEGARIO, AMAURI ANTONIO; CHANG, HUNG KIANG. Geochemical evolution of groundwater in a basaltic aquifer based on chemical and stable isotopic data: Case study from the Northeastern portion of Serra Geral Aquifer, Sao Paulo state (Brazil). Journal of Hydrology, v. 535, p. 598-611, APR 2016. (12/00241-5)

GASTMANS, DIDIER; MENEGARIO, AMAURI ANTONIO; HUTCHEON, IAN. Stable isotopes, carbon-14 and hydrochemical composition from a basaltic aquifer in Sao Paulo State, Brazil. ENVIRONMENTAL EARTH SCIENCES, v. 76, n. 4, FEB 2017. (12/00241-5)