Genesis of textural contrasts in subsurface soil horizons in the Northern Pantanal-Brazil

Genesis of textural contrasts in subsurface soil horizons in the Northern Pantanal-Brazil

The Pantanal region can be characterized as a quaternary floodplain with predominant sedimentation in the form of alluvial fans. In the geomorphologic and sedimentary evolution, the avulsion process is inherent to this depositional system and its dynamics, together with surface water floods, influence soil sedimentation on this plain. The knowledge and differentiation of these two events can contribute to a better understanding of the variability of soil properties and distribution under the influence of these sedimentation processes. Therefore, this study investigated the genesis of soils in the Northern Pantanal with textural contrasts in deeper horizons and their relationship with the depositional system dynamics. We analyzed four soil profiles in the region of Barão de Melgaço, Mato Grosso State, Brazil (RPPN SESC Pantanal). Two profiles were sampled near the Rio Cuiabá (AP1 and AP4) and two near the Rio São Lourenço (AP10 and AP11). In AP11, the horizons contrast in particle size between the profile basis and the surface. In AP1, AP4 and AP10, the horizons overlaying the sand layer have similar particle size properties, mainly in terms of sand distribution. In the first case, floods (surface water) seem to have originated the horizons and layers with contrasting texture. In the second case, avulsion is the most pronounced process. Therefore, the two modes can form soils with contrasting texture that are discriminable by soil morphology, based on the distinct features associated to the specific sedimentation processes.

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Main Authors: Nascimento,Alexandre Ferreira do, Furquim,Sheila Aparecida Correia, Couto,Eduardo Guimarães, Beirigo,Raphael Moreira, Oliveira Júnior,Jairo Calderari de, Camargo,Plínio Barbosa de, Vidal-Torrado,Pablo
Format: Digital revista
Language:English
Published: Sociedade Brasileira de Ciência do Solo 2013
Online Access:http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000500001
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spelling oai:scielo:S0100-068320130005000012013-12-17Genesis of textural contrasts in subsurface soil horizons in the Northern Pantanal-BrazilNascimento,Alexandre Ferreira doFurquim,Sheila Aparecida CorreiaCouto,Eduardo GuimarãesBeirigo,Raphael MoreiraOliveira Júnior,Jairo Calderari deCamargo,Plínio Barbosa deVidal-Torrado,Pablo alluvial soils hydromorphic soils fluvial deposition system alluvial fans avulsion The Pantanal region can be characterized as a quaternary floodplain with predominant sedimentation in the form of alluvial fans. In the geomorphologic and sedimentary evolution, the avulsion process is inherent to this depositional system and its dynamics, together with surface water floods, influence soil sedimentation on this plain. The knowledge and differentiation of these two events can contribute to a better understanding of the variability of soil properties and distribution under the influence of these sedimentation processes. Therefore, this study investigated the genesis of soils in the Northern Pantanal with textural contrasts in deeper horizons and their relationship with the depositional system dynamics. We analyzed four soil profiles in the region of Barão de Melgaço, Mato Grosso State, Brazil (RPPN SESC Pantanal). Two profiles were sampled near the Rio Cuiabá (AP1 and AP4) and two near the Rio São Lourenço (AP10 and AP11). In AP11, the horizons contrast in particle size between the profile basis and the surface. In AP1, AP4 and AP10, the horizons overlaying the sand layer have similar particle size properties, mainly in terms of sand distribution. In the first case, floods (surface water) seem to have originated the horizons and layers with contrasting texture. In the second case, avulsion is the most pronounced process. Therefore, the two modes can form soils with contrasting texture that are discriminable by soil morphology, based on the distinct features associated to the specific sedimentation processes.info:eu-repo/semantics/openAccessSociedade Brasileira de Ciência do SoloRevista Brasileira de Ciência do Solo v.37 n.5 20132013-10-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000500001en10.1590/S0100-06832013000500001
institution SCIELO
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country Brasil
countrycode BR
component Revista
access En linea
databasecode rev-scielo-br
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region America del Sur
libraryname SciELO
language English
format Digital
author Nascimento,Alexandre Ferreira do
Furquim,Sheila Aparecida Correia
Couto,Eduardo Guimarães
Beirigo,Raphael Moreira
Oliveira Júnior,Jairo Calderari de
Camargo,Plínio Barbosa de
Vidal-Torrado,Pablo
spellingShingle Nascimento,Alexandre Ferreira do
Furquim,Sheila Aparecida Correia
Couto,Eduardo Guimarães
Beirigo,Raphael Moreira
Oliveira Júnior,Jairo Calderari de
Camargo,Plínio Barbosa de
Vidal-Torrado,Pablo
Genesis of textural contrasts in subsurface soil horizons in the Northern Pantanal-Brazil
author_facet Nascimento,Alexandre Ferreira do
Furquim,Sheila Aparecida Correia
Couto,Eduardo Guimarães
Beirigo,Raphael Moreira
Oliveira Júnior,Jairo Calderari de
Camargo,Plínio Barbosa de
Vidal-Torrado,Pablo
author_sort Nascimento,Alexandre Ferreira do
title Genesis of textural contrasts in subsurface soil horizons in the Northern Pantanal-Brazil
title_short Genesis of textural contrasts in subsurface soil horizons in the Northern Pantanal-Brazil
title_full Genesis of textural contrasts in subsurface soil horizons in the Northern Pantanal-Brazil
title_fullStr Genesis of textural contrasts in subsurface soil horizons in the Northern Pantanal-Brazil
title_full_unstemmed Genesis of textural contrasts in subsurface soil horizons in the Northern Pantanal-Brazil
title_sort genesis of textural contrasts in subsurface soil horizons in the northern pantanal-brazil
description The Pantanal region can be characterized as a quaternary floodplain with predominant sedimentation in the form of alluvial fans. In the geomorphologic and sedimentary evolution, the avulsion process is inherent to this depositional system and its dynamics, together with surface water floods, influence soil sedimentation on this plain. The knowledge and differentiation of these two events can contribute to a better understanding of the variability of soil properties and distribution under the influence of these sedimentation processes. Therefore, this study investigated the genesis of soils in the Northern Pantanal with textural contrasts in deeper horizons and their relationship with the depositional system dynamics. We analyzed four soil profiles in the region of Barão de Melgaço, Mato Grosso State, Brazil (RPPN SESC Pantanal). Two profiles were sampled near the Rio Cuiabá (AP1 and AP4) and two near the Rio São Lourenço (AP10 and AP11). In AP11, the horizons contrast in particle size between the profile basis and the surface. In AP1, AP4 and AP10, the horizons overlaying the sand layer have similar particle size properties, mainly in terms of sand distribution. In the first case, floods (surface water) seem to have originated the horizons and layers with contrasting texture. In the second case, avulsion is the most pronounced process. Therefore, the two modes can form soils with contrasting texture that are discriminable by soil morphology, based on the distinct features associated to the specific sedimentation processes.
publisher Sociedade Brasileira de Ciência do Solo
publishDate 2013
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832013000500001
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