O Chapadão do Diamante na Serra da Canastra/MG, Brazil: caracterização geomorfológica e análise integrada do meio físico a partir de dados multifontes

Nazar, Thallita Isabela Silva Martins

doi:10.14393/ufu.te.2018.608

Cited by 2 publications

(4 citation statements)

References 15 publications

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“…Recent studies carried out at Chapadão do Diamante (Nazar, 2018) show that there are three main groups of surface geocovers (Figure 4). The first group which sums approximately 60% of the study area consists of mostly rocky and weakly weathered materials denominated as gravel-sandy with a chaos of blocks, undifferentiated gravel-sand and rocky outcrops.…”

Section: Resultsmentioning

confidence: 99%

“…Research carried out by Nazar (2018), Araújo (2017) and Magalhães (2015) showed geomorphological aspects and the evolution of the drainage network in the extreme eastern section of the Canastra Mountain Range, regionally known as Chapadão do Diamante. This area shows the highest reliefs of the entire regional system, with presence of quartzitic outcrops on hilltops, that form a chaos of blocks on the surface.…”

Section: Introductionmentioning

confidence: 99%

“…Ferricretes are also found in both surface and subsurface soils. Nazar (2018) and Nazar and Rodrigues (2019a), pointed out that the Chapadão do Diamante landscape favors good results in OSL and c14 studies as it presents favorable conditions such as: materials rich in quartz, colluvium deposits materials on the slopes; the homogeneous texture of surface materials, the presence of herbaceous and shrubs vegetation and preserved from agricultural activities due to the poor fertile soil and mountainous relief. Also organic deposits are observed in several slope segments, forming small peatlands, in addition to small pocket plains along the river channels.…”

Section: Introductionmentioning

confidence: 99%

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Chronology of Quartzitic Slopes From Minas Gerais, Brazil

Rodrigues¹,

Santos²,

Carvalho³

et al. 2022

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Quartzitic mountain reliefs developed in a tropical savanna climate tend to have shallow sedimentary deposits. This is due to low level weathering processes of quartzite rocks and formation of colluvium ramps on the slopes. This study aims to determine the characteristics of colluvial materials, particularly grain size, and to analyze sediment chronology above the saprolite, seeking to identify accumulation rates and make correlations with the dynamics of the recent geomorphological evolution of the Canastra range in Minas Gerais, Brazil. Samples collected in different morphological positions were submitted to granulometric analysis and dated by Optically Stimulated Luminescence Single Aliquote Regeneration (OSL/SAR) and radiocarbon dating. Grain size analysis showed a predominance of sandy and gravel materials and demonstrated that the colluvial ramps in the study area contain materials derived from the decomposition of quartzite rocks, accumulated in shallow and sandy profiles. LOE/SAR dating indicated ages between the end of the Pleistocene, not exceeding 30,500 +/- 4,950 BP, to 500 years BP, whereas the 14C dating showed ages between 4460 +/- 30 BP and 1140 +/- 30 BP. These data indicate that the deposits from the study area are relatively recent, which demonstrate that variations in the weathering process and deposit formation have undergone recent changes, probably due to climatic fluctuations and changes in the regional hydrological regime. Keywords: Canastra Range, Paleogeomorphological Reconstruction, Weathering of Quartzites, OSL, Tropical Range

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Chronology of Quartzitic Slopes From Minas Gerais, Brazil

Rodrigues¹,

Santos²,

Carvalho³

et al. 2022

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“…Dentre as classes, a geocobertura denominada de Materiais orgânicos associados a áreas úmidas abrange uma área de 8,97 % de todo chapadão, ocorrendo principalmente nos de fundos de vale, estando relacionada aos padrões de relevo fortemente dissecados, nos quais se observa vales encaixados e por vezes, cursos d'água correndo sobre as rochas (Nazar, 2018).…”

Section: Materiais E Métodosunclassified

Dinâmica Hídrica do Solo de Zona Ripária do Chapadão do Diamante – Serra da Canastra, Minas Gerais

Confessor,

Silva,

Lima

et al. 2024

S&N

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O parque nacional da Serra da Canastra-MG consolida-se como uma unidade de conservação inserida no Bioma de Cerrado que abriga em seu interior nascentes de importantes bacias hidrográficas brasileiras. Visto sua importância para dinâmica hídrica local e nacional, este trabalho teve por objetivo de analisar e compreender as características físico-hídricas do solo de uma zona ripária presente em seu interior. Utilizou-se para prospecção de dados de campo um simulador de chuvas e um infiltrômetro de anéis concêntricos. Os resultados demostraram para área em estudo alta capacidade de infiltração, sendo escoados superficialmente 23,74% dos volumes precipitados artificialmente (intensidade 57,4mm/h), expondo valores de velocidade de infiltração básica (VIB) considerados como muito altos (50,74 mm/h). No geral, os valores estão associados a dinâmica dos elementos paisagísticos, destacando a relevância da vegetação em sua cobertura vegetal e dos atributos físicos do solo, os quais repercutiram na modulação de sua capacidade de reter, infiltrar e armazenar grandes volumes de água. Neste sentido, destaca-se a importância destas áreas para os ambientes, as quais são responsáveis pela proteção dos cursos d’água, consolidando-se como barreiras frente a fluxos erosivos advindos de áreas vertente acima, incorporando a água no perfil do solo de modo a armazená-la e disponibilizá-la ao longo do tempo, tornando-se locais de regulação hídrica.

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O Chapadão do Diamante na Serra da Canastra/MG, Brazil: caracterização geomorfológica e análise integrada do meio físico a partir de dados multifontes

Cited by 2 publications

References 15 publications

Chronology of Quartzitic Slopes From Minas Gerais, Brazil

Chronology of Quartzitic Slopes From Minas Gerais, Brazil

Dinâmica Hídrica do Solo de Zona Ripária do Chapadão do Diamante – Serra da Canastra, Minas Gerais

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