Análisis Sedimentológico y geomorfológico de áreas lacustres en la Península Fildes, Isla Rey Jorge, Antártica Marítima
Geomorphological features and sedimentary characteristics are analized from five sets of shallow sediment cores collected in lakes in the Fildes Peninsula, King George Island. The geomorphology of the area was observed and sediments samples were obtained at field activities during the XXXI Brazilian...
| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Universidad de Chile, Departamento de Geografía
2015-07-01
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| Series: | Investigaciones Geográficas |
| Online Access: | https://investigacionesgeograficas.uchile.cl/index.php/IG/article/view/37511 |
| _version_ | 1819014451620216832 |
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| author | Rosemary Vieira Humberto Marotta Kátia Kellem da Rosa Ricardo Jaña Carolina Lorenz Simões Enoil de Souza Júnior Fabrício Ferreira Liliane Ronquette Santos João Victor dos Santos Marcos Aurélio Perroni Matheus Gonçalves João Pedro Farias Santos Raphael Issa Rodrigues Janaína Cynthia Medeiros Galvão João Paulo de Sá Felizardo |
| author_facet | Rosemary Vieira Humberto Marotta Kátia Kellem da Rosa Ricardo Jaña Carolina Lorenz Simões Enoil de Souza Júnior Fabrício Ferreira Liliane Ronquette Santos João Victor dos Santos Marcos Aurélio Perroni Matheus Gonçalves João Pedro Farias Santos Raphael Issa Rodrigues Janaína Cynthia Medeiros Galvão João Paulo de Sá Felizardo |
| author_sort | Rosemary Vieira |
| collection | DOAJ |
| description | Geomorphological features and sedimentary characteristics are analized from five sets of shallow sediment cores collected in lakes in the Fildes Peninsula, King George Island. The geomorphology of the area was observed and sediments samples were obtained at field activities during the XXXI Brazilian Antarctic Operation (March-April/2013). Biogeochemical characteristics, physical parameters, mineralogical composition, particle size distribution, macroscopic characteristics of the sediments and satellite images were analized. Preliminary results indicate climatic and environmental changes in north-south transect of the peninsula. The mineralogical composition is associated with geological structure of the area, where basaltic rocks predominate. The particle size variation reflects different sediment source environments. Macroscopic analysis and mineralogical composition variation reflect the action of weathering along the peninsula. The sediments also have potential mineralization and subsequent release of greenhouse gases. A preliminary map of the classification of the lakes is presented. In addition, it was identified that wetland sediment presents methane production rates (CH4) about 40 times larger and more sensitive to the effect of global warming compared to lake sediment. Subpolar aquatic ecosystems sediments from Maritime Antarctica can be a preferential site for the effects of climate variability. |
| first_indexed | 2024-12-21T02:16:03Z |
| format | Article |
| id | doaj.art-aa2769d993204cfd98c3faa0a1a42a64 |
| institution | Directory Open Access Journal |
| issn | 0718-9575 0719-5370 |
| language | English |
| last_indexed | 2024-12-21T02:16:03Z |
| publishDate | 2015-07-01 |
| publisher | Universidad de Chile, Departamento de Geografía |
| record_format | Article |
| series | Investigaciones Geográficas |
| spelling | doaj.art-aa2769d993204cfd98c3faa0a1a42a642022-12-21T19:19:15ZengUniversidad de Chile, Departamento de GeografíaInvestigaciones Geográficas0718-95750719-53702015-07-0149ág. 33010.5354/0719-5370.2015.3751137511Análisis Sedimentológico y geomorfológico de áreas lacustres en la Península Fildes, Isla Rey Jorge, Antártica MarítimaRosemary Vieira0Humberto MarottaKátia Kellem da RosaRicardo JañaCarolina Lorenz SimõesEnoil de Souza JúniorFabrício FerreiraLiliane Ronquette SantosJoão Victor dos SantosMarcos Aurélio PerroniMatheus GonçalvesJoão Pedro Farias SantosRaphael Issa RodriguesJanaína Cynthia Medeiros GalvãoJoão Paulo de Sá FelizardoLaboratório de Processos Sedimentares e Ambientais (LAPSA), Programa de Pós-Graduação em geografia (POSGEO/UFF), UFF - Instituto de GeociênciasGeomorphological features and sedimentary characteristics are analized from five sets of shallow sediment cores collected in lakes in the Fildes Peninsula, King George Island. The geomorphology of the area was observed and sediments samples were obtained at field activities during the XXXI Brazilian Antarctic Operation (March-April/2013). Biogeochemical characteristics, physical parameters, mineralogical composition, particle size distribution, macroscopic characteristics of the sediments and satellite images were analized. Preliminary results indicate climatic and environmental changes in north-south transect of the peninsula. The mineralogical composition is associated with geological structure of the area, where basaltic rocks predominate. The particle size variation reflects different sediment source environments. Macroscopic analysis and mineralogical composition variation reflect the action of weathering along the peninsula. The sediments also have potential mineralization and subsequent release of greenhouse gases. A preliminary map of the classification of the lakes is presented. In addition, it was identified that wetland sediment presents methane production rates (CH4) about 40 times larger and more sensitive to the effect of global warming compared to lake sediment. Subpolar aquatic ecosystems sediments from Maritime Antarctica can be a preferential site for the effects of climate variability.https://investigacionesgeograficas.uchile.cl/index.php/IG/article/view/37511 |
| spellingShingle | Rosemary Vieira Humberto Marotta Kátia Kellem da Rosa Ricardo Jaña Carolina Lorenz Simões Enoil de Souza Júnior Fabrício Ferreira Liliane Ronquette Santos João Victor dos Santos Marcos Aurélio Perroni Matheus Gonçalves João Pedro Farias Santos Raphael Issa Rodrigues Janaína Cynthia Medeiros Galvão João Paulo de Sá Felizardo Análisis Sedimentológico y geomorfológico de áreas lacustres en la Península Fildes, Isla Rey Jorge, Antártica Marítima Investigaciones Geográficas |
| title | Análisis Sedimentológico y geomorfológico de áreas lacustres en la Península Fildes, Isla Rey Jorge, Antártica Marítima |
| title_full | Análisis Sedimentológico y geomorfológico de áreas lacustres en la Península Fildes, Isla Rey Jorge, Antártica Marítima |
| title_fullStr | Análisis Sedimentológico y geomorfológico de áreas lacustres en la Península Fildes, Isla Rey Jorge, Antártica Marítima |
| title_full_unstemmed | Análisis Sedimentológico y geomorfológico de áreas lacustres en la Península Fildes, Isla Rey Jorge, Antártica Marítima |
| title_short | Análisis Sedimentológico y geomorfológico de áreas lacustres en la Península Fildes, Isla Rey Jorge, Antártica Marítima |
| title_sort | analisis sedimentologico y geomorfologico de areas lacustres en la peninsula fildes isla rey jorge antartica maritima |
| url | https://investigacionesgeograficas.uchile.cl/index.php/IG/article/view/37511 |
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