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SPODOSOLS UNDER GRASS FIELDS IN MIDST OF THE ATLANTIC FOREST IN LINHARES, ES: A SEDIMENTOLOGIC-PEDOLOGIC APPROACH, WITH EMPHASIS ON HEAVY MINERALS

Grant number: 12/05731-0
Support type:Scholarships in Brazil - Scientific Initiation
Effective date (Start): May 01, 2012
Effective date (End): April 30, 2013
Field of knowledge:Physical Sciences and Mathematics - Geosciences - Geology
Principal researcher:Paulo César Fonseca Giannini
Grantee:Fernanda Costa Gonçalves Rodrigues
Home Institution: Instituto de Geociências (IGC). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:11/00995-7 - Interdisciplinary paleoenvironmental studies in the Espirito Santo State coast, AP.PFPMCG.TEM

Abstract

This project aims to study the spacial distribution, structure, texture, mineralogy and origin of the Spodosols that occur on the Barreiras Formation and under grass vegetation ("campos nativos"), in midst of the Atlantic Forest preserved on the Linhares natural reserves (northeast of Espírito Santo state, southeast Brazil). The Spodosols - grass vegetation occurs as patches up to 500m wide, surrounded by Ultisols under typical Atlantic Forest. The approach proposed for their study is the integration between sedimentologic methods, as grain-size and heavy minerals analysis, and methods tipical of pedological researches, like geochemical, isotopic and micromorphological analysis. The focus of the heavy minerals analysis will emphasize the quantitative variation of the assemblage and the textural indications of chemical dissolution, along vertical soil profiles. It will provide an opportunity to evaluate and discuss the weathering effects on the in loco destruction of chemically unstable heavy minerals, as well their implications on the clay and solute generation, an important factor of pedogenesis.

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