Depressões Fechadas em Relevo Cárstico-Quartzítico, Bacia do Ribeirão Santana, Médio Vale do Rio Paraíba do Sul.
Karstic features generally develop in carbonatic rocks, but can also occur in siliciclastic rocks, as quartzites. The present research aims to create superficial morphology mapping and reconnaissance of karstic area deposits in quartzitic rocks. The study was developed in the hydrographic basin of...
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| Format: | Article |
| Language: | English |
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Universidade Federal do Rio de Janeiro
2006-09-01
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| Series: | Anuário do Instituto de Geociências |
| Subjects: | |
| Online Access: | http://www.anuario.igeo.ufrj.br/anuario_2006_2/anuario_2006_v29_2_87_100.pdf |
| _version_ | 1828081408810156032 |
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| author | Ana Luiza Coelho Netto André de Souza Avelar Rogério Uagoda |
| author_facet | Ana Luiza Coelho Netto André de Souza Avelar Rogério Uagoda |
| author_sort | Ana Luiza Coelho Netto |
| collection | DOAJ |
| description | Karstic features generally develop in carbonatic rocks, but can also occur in siliciclastic rocks, as quartzites. The present research aims to create superficial morphology mapping and reconnaissance of karstic area deposits in quartzitic rocks. The study was developed in the hydrographic basin of the Ribeirão Santana (210 km2), mid-valley of the Preto river, a tributary of the Paraíba do Sul river, located between the states of Rio de Janeiro and Minas Gerais,Brazil.Aerial photographs at 1:25.000 scale were reconstituted in 3D environments,resulting in a planimetric and altitudinal map at 1:10.000 scale. Closed depressions, concavities with and without channels and deposits, were detached from these maps. Precise field topographic surveys at 1:500 scale resulted in planimetric and altitudinal maps related to identified forms. Also, soil sampleswere collected in the valley basins and depressions and analyzed according to their color, texture and grain morphoscopy criteria. Such study resulted in soil profiles for deposits confined at the bottoms of depressions and schematic representations of sediments from valley bottoms and slopes. The results indicate that the closed depressions a generally positioned at the limit of the drainage.In all sampler from the slope and fluvial valley bottom deposits the sand fraction predominates over fine particles, which were probably carried away in solution.Similar to the literature description, deep organic and/or hydromorphic profiles were found in depressions confined deposits. The present data can contribute to future geologic, hydrologic and geochemical characteristics to interpretetthe origin and development of karstic features. |
| first_indexed | 2024-04-11T03:34:40Z |
| format | Article |
| id | doaj.art-8b39ac2d9abb49c69626cf209fc7516d |
| institution | Directory Open Access Journal |
| issn | 0101-9759 |
| language | English |
| last_indexed | 2024-04-11T03:34:40Z |
| publishDate | 2006-09-01 |
| publisher | Universidade Federal do Rio de Janeiro |
| record_format | Article |
| series | Anuário do Instituto de Geociências |
| spelling | doaj.art-8b39ac2d9abb49c69626cf209fc7516d2023-01-02T05:35:10ZengUniversidade Federal do Rio de JaneiroAnuário do Instituto de Geociências0101-97592006-09-0129287100Depressões Fechadas em Relevo Cárstico-Quartzítico, Bacia do Ribeirão Santana, Médio Vale do Rio Paraíba do Sul.Ana Luiza Coelho NettoAndré de Souza AvelarRogério UagodaKarstic features generally develop in carbonatic rocks, but can also occur in siliciclastic rocks, as quartzites. The present research aims to create superficial morphology mapping and reconnaissance of karstic area deposits in quartzitic rocks. The study was developed in the hydrographic basin of the Ribeirão Santana (210 km2), mid-valley of the Preto river, a tributary of the Paraíba do Sul river, located between the states of Rio de Janeiro and Minas Gerais,Brazil.Aerial photographs at 1:25.000 scale were reconstituted in 3D environments,resulting in a planimetric and altitudinal map at 1:10.000 scale. Closed depressions, concavities with and without channels and deposits, were detached from these maps. Precise field topographic surveys at 1:500 scale resulted in planimetric and altitudinal maps related to identified forms. Also, soil sampleswere collected in the valley basins and depressions and analyzed according to their color, texture and grain morphoscopy criteria. Such study resulted in soil profiles for deposits confined at the bottoms of depressions and schematic representations of sediments from valley bottoms and slopes. The results indicate that the closed depressions a generally positioned at the limit of the drainage.In all sampler from the slope and fluvial valley bottom deposits the sand fraction predominates over fine particles, which were probably carried away in solution.Similar to the literature description, deep organic and/or hydromorphic profiles were found in depressions confined deposits. The present data can contribute to future geologic, hydrologic and geochemical characteristics to interpretetthe origin and development of karstic features.http://www.anuario.igeo.ufrj.br/anuario_2006_2/anuario_2006_v29_2_87_100.pdfkarst geomorphologyheadwater basinsclosed depressions |
| spellingShingle | Ana Luiza Coelho Netto André de Souza Avelar Rogério Uagoda Depressões Fechadas em Relevo Cárstico-Quartzítico, Bacia do Ribeirão Santana, Médio Vale do Rio Paraíba do Sul. Anuário do Instituto de Geociências karst geomorphology headwater basins closed depressions |
| title | Depressões Fechadas em Relevo Cárstico-Quartzítico, Bacia do Ribeirão Santana, Médio Vale do Rio Paraíba do Sul. |
| title_full | Depressões Fechadas em Relevo Cárstico-Quartzítico, Bacia do Ribeirão Santana, Médio Vale do Rio Paraíba do Sul. |
| title_fullStr | Depressões Fechadas em Relevo Cárstico-Quartzítico, Bacia do Ribeirão Santana, Médio Vale do Rio Paraíba do Sul. |
| title_full_unstemmed | Depressões Fechadas em Relevo Cárstico-Quartzítico, Bacia do Ribeirão Santana, Médio Vale do Rio Paraíba do Sul. |
| title_short | Depressões Fechadas em Relevo Cárstico-Quartzítico, Bacia do Ribeirão Santana, Médio Vale do Rio Paraíba do Sul. |
| title_sort | depressoes fechadas em relevo carstico quartzitico bacia do ribeirao santana medio vale do rio paraiba do sul |
| topic | karst geomorphology headwater basins closed depressions |
| url | http://www.anuario.igeo.ufrj.br/anuario_2006_2/anuario_2006_v29_2_87_100.pdf |
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