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2023-04-17T22:24:14Z2023-04-17T22:24:14Z2016-06-30172369387https://doi.org/10.20502/rbg.v17i2.8162236-5664http://hdl.handle.net/1843/52103https://orcid.org/0000-0001-6345-1835https://orcid.org/0000-0002-9930-1801https://orcid.org/0000-0001-7227-7074A origem das depressões fechadas associadas à cobertura laterítica aluminosa nos topos dos morros e ao longo das vertentes na região de Espera Feliz, MG, divisa com Espírito Santo, foi pesquisada através de um levantamento geofísico da cobertura pedológica associado às análises morfológicas (macro e micro) de perfis de solos. O levantamento geofísico por GPR, realizado em 2 seções ao longo de uma vertente, abrangeu duas depressões consecutivas e foi seguido do levantamento sistemático da cobertura pedológica por meio da abertura de 5 perfis (N1, L1, L2, N2 e L3). Foram coletadas amostras deformadas para análises físicas, mineralógicas e químicas e amostras indeformadas para análise micromorfológica. No interior das depressões fechadas foi identificado o Neossolo Litólico húmico típico e entre as depressões ocorre o Latossolo Vermelho Amarelo distrófico húmico. A análise lateral realizada pelo GPR e a interpretação conjunta dos atributos da cobertura revelam um sistema pedológico contínuo do topo a base da vertente. As diferenças morfológicas que levam a existência de distintas classes de solos traduzem, neste contexto, a evolução pedogeomorfológica da vertente e consequente gênese das depressões, o que teria ocorrido de maneira distinta ao modelo de subsidência por lixiviação geoquímica, mais amplamente conhecido. Dois momentos são reconhecidos: i) a origem de uma cobertura latossólica relacionada ao avanço vertical da degradação da bauxita e à bioturbação sob condições climáticas úmidas e ii) remoção de partes dessa cobertura em condições climáticas (possivelmente áridas) posteriores.The origin of the closed depressions associated with the aluminous duricrust occurring on the tops of the hills and along the hillslope in the region of Espera Feliz city, Minas Gerais state, bordering the Espírito Santo state, was investigated through a geophysical survey of soil cover associated with the morphological analysis (macro and micro) in soil profi les. Geophysical survey by GPR held in two sections along a slope, covered two consecutive depressions and was followed by systematic survey of soil cover through the opening 5 profi les (N1, L1, L2, N2 and L3), where deformed samples were collected for chemical, physical and mineralogical analysis and undisturbed samples for micromorphological analysis. Humic Neosols were found inside the closed depressions and Humic Ferralsols were found between the closed depressions. The side analysis performed by GPR and the joint interpretation of the soil properties reveals a persistent pedological system from top to bottom of the slope. So the morphological diff erences that would lead to consider two soil classes are related to the occurency of mass moviments. The origin of the horizon (Bw and A) are related to the vertical advance of bauxite degradation conducted by bioturbation. The aluminous duricrust and its transformation into soil are understood as preceding stages of erosive features formation. Thus, the bauxite in the region would have formed under hot and humid weather conditions and removing parts of the cover in later dry weather conditions.CNPq - Conselho Nacional de Desenvolvimento Científico e TecnológicoFAPEMIG - Fundação de Amparo à Pesquisa do Estado de Minas GeraisCAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível SuperiorporUniversidade Federal de Minas GeraisUFMGBrasilIGC - DEPARTAMENTO DE GEOGRAFIARevista Brasileira de GeomorfologiaRelevoEspirito SantoGeofísicosGeologiaRelevoEspirito SantoGeofísicosGeologiaDepressões fechadasRadar de Penetração no SoloMicromorfologiaGênese de depressões fechadas em vertentes associadas à couraça aluminosa na porção sul da Serra do Caparaó, Minas Gerais/Espirito SantoGenesis of closed depression in slopes associated with aluminous duricrust in the south region of Caparaó Ridge, Minas Gerais/Espirito Santoinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttps://rbgeomorfologia.org.br/rbg/article/view/816Ana Carolina Campos MateusFábio Soares de OliveiraAngélica Fortes Drummond Chicarino VarajãoCaroline Cibele Vieira SoaresAdriano Luis Schünemannapplication/pdfinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFMGinstname:Universidade Federal de Minas Gerais (UFMG)instacron:UFMGLICENSELicense.txtLicense.txttext/plain; charset=utf-82042https://repositorio.ufmg.br/bitstream/1843/52103/1/License.txtfa505098d172de0bc8864fc1287ffe22MD51ORIGINALgenesededepressoesfechadas.pdfgenesededepressoesfechadas.pdfapplication/pdf13505038https://repositorio.ufmg.br/bitstream/1843/52103/2/genesededepressoesfechadas.pdfd5af07ad2728798447863a93c7f3a9dcMD521843/521032023-04-17 19:24:14.922oai:repositorio.ufmg.br:1843/52103TElDRU7vv71BIERFIERJU1RSSUJVSe+/ve+/vU8gTu+/vU8tRVhDTFVTSVZBIERPIFJFUE9TSVTvv71SSU8gSU5TVElUVUNJT05BTCBEQSBVRk1HCiAKCkNvbSBhIGFwcmVzZW50Ye+/ve+/vW8gZGVzdGEgbGljZW7vv71hLCB2b2Pvv70gKG8gYXV0b3IgKGVzKSBvdSBvIHRpdHVsYXIgZG9zIGRpcmVpdG9zIGRlIGF1dG9yKSBjb25jZWRlIGFvIFJlcG9zaXTvv71yaW8gSW5zdGl0dWNpb25hbCBkYSBVRk1HIChSSS1VRk1HKSBvIGRpcmVpdG8gbu+/vW8gZXhjbHVzaXZvIGUgaXJyZXZvZ++/vXZlbCBkZSByZXByb2R1emlyIGUvb3UgZGlzdHJpYnVpciBhIHN1YSBwdWJsaWNh77+977+9byAoaW5jbHVpbmRvIG8gcmVzdW1vKSBwb3IgdG9kbyBvIG11bmRvIG5vIGZvcm1hdG8gaW1wcmVzc28gZSBlbGV0cu+/vW5pY28gZSBlbSBxdWFscXVlciBtZWlvLCBpbmNsdWluZG8gb3MgZm9ybWF0b3Mg77+9dWRpbyBvdSB277+9ZGVvLgoKVm9j77+9IGRlY2xhcmEgcXVlIGNvbmhlY2UgYSBwb2zvv710aWNhIGRlIGNvcHlyaWdodCBkYSBlZGl0b3JhIGRvIHNldSBkb2N1bWVudG8gZSBxdWUgY29uaGVjZSBlIGFjZWl0YSBhcyBEaXJldHJpemVzIGRvIFJJLVVGTUcuCgpWb2Pvv70gY29uY29yZGEgcXVlIG8gUmVwb3NpdO+/vXJpbyBJbnN0aXR1Y2lvbmFsIGRhIFVGTUcgcG9kZSwgc2VtIGFsdGVyYXIgbyBjb250Ze+/vWRvLCB0cmFuc3BvciBhIHN1YSBwdWJsaWNh77+977+9byBwYXJhIHF1YWxxdWVyIG1laW8gb3UgZm9ybWF0byBwYXJhIGZpbnMgZGUgcHJlc2VydmHvv73vv71vLgoKVm9j77+9IHRhbWLvv71tIGNvbmNvcmRhIHF1ZSBvIFJlcG9zaXTvv71yaW8gSW5zdGl0dWNpb25hbCBkYSBVRk1HIHBvZGUgbWFudGVyIG1haXMgZGUgdW1hIGPvv71waWEgZGUgc3VhIHB1YmxpY2Hvv73vv71vIHBhcmEgZmlucyBkZSBzZWd1cmFu77+9YSwgYmFjay11cCBlIHByZXNlcnZh77+977+9by4KClZvY++/vSBkZWNsYXJhIHF1ZSBhIHN1YSBwdWJsaWNh77+977+9byDvv70gb3JpZ2luYWwgZSBxdWUgdm9j77+9IHRlbSBvIHBvZGVyIGRlIGNvbmNlZGVyIG9zIGRpcmVpdG9zIGNvbnRpZG9zIG5lc3RhIGxpY2Vu77+9YS4gVm9j77+9IHRhbWLvv71tIGRlY2xhcmEgcXVlIG8gZGVw77+9c2l0byBkZSBzdWEgcHVibGljYe+/ve+/vW8gbu+/vW8sIHF1ZSBzZWphIGRlIHNldSBjb25oZWNpbWVudG8sIGluZnJpbmdlIGRpcmVpdG9zIGF1dG9yYWlzIGRlIG5pbmd177+9bS4KCkNhc28gYSBzdWEgcHVibGljYe+/ve+/vW8gY29udGVuaGEgbWF0ZXJpYWwgcXVlIHZvY++/vSBu77+9byBwb3NzdWkgYSB0aXR1bGFyaWRhZGUgZG9zIGRpcmVpdG9zIGF1dG9yYWlzLCB2b2Pvv70gZGVjbGFyYSBxdWUgb2J0ZXZlIGEgcGVybWlzc++/vW8gaXJyZXN0cml0YSBkbyBkZXRlbnRvciBkb3MgZGlyZWl0b3MgYXV0b3JhaXMgcGFyYSBjb25jZWRlciBhbyBSZXBvc2l077+9cmlvIEluc3RpdHVjaW9uYWwgZGEgVUZNRyBvcyBkaXJlaXRvcyBhcHJlc2VudGFkb3MgbmVzdGEgbGljZW7vv71hLCBlIHF1ZSBlc3NlIG1hdGVyaWFsIGRlIHByb3ByaWVkYWRlIGRlIHRlcmNlaXJvcyBlc3Tvv70gY2xhcmFtZW50ZSBpZGVudGlmaWNhZG8gZSByZWNvbmhlY2lkbyBubyB0ZXh0byBvdSBubyBjb250Ze+/vWRvIGRhIHB1YmxpY2Hvv73vv71vIG9yYSBkZXBvc2l0YWRhLgoKQ0FTTyBBIFBVQkxJQ0Hvv73vv71PIE9SQSBERVBPU0lUQURBIFRFTkhBIFNJRE8gUkVTVUxUQURPIERFIFVNIFBBVFJPQ++/vU5JTyBPVSBBUE9JTyBERSBVTUEgQUfvv71OQ0lBIERFIEZPTUVOVE8gT1UgT1VUUk8gT1JHQU5JU01PLCBWT0Pvv70gREVDTEFSQSBRVUUgUkVTUEVJVE9VIFRPRE9TIEUgUVVBSVNRVUVSIERJUkVJVE9TIERFIFJFVklT77+9TyBDT01PIFRBTULvv71NIEFTIERFTUFJUyBPQlJJR0Hvv73vv71FUyBFWElHSURBUyBQT1IgQ09OVFJBVE8gT1UgQUNPUkRPLgoKTyBSZXBvc2l077+9cmlvIEluc3RpdHVjaW9uYWwgZGEgVUZNRyBzZSBjb21wcm9tZXRlIGEgaWRlbnRpZmljYXIgY2xhcmFtZW50ZSBvIHNldSBub21lKHMpIG91IG8ocykgbm9tZXMocykgZG8ocykgZGV0ZW50b3IoZXMpIGRvcyBkaXJlaXRvcyBhdXRvcmFpcyBkYSBwdWJsaWNh77+977+9bywgZSBu77+9byBmYXLvv70gcXVhbHF1ZXIgYWx0ZXJh77+977+9bywgYWzvv71tIGRhcXVlbGFzIGNvbmNlZGlkYXMgcG9yIGVzdGEgbGljZW7vv71hLgo=Repositório InstitucionalPUBhttps://repositorio.ufmg.br/oaiopendoar:2023-04-17T22:24:14Repositório Institucional da UFMG - Universidade Federal de Minas Gerais (UFMG)false
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