Made available in DSpace on 2017-07-10T17:31:16Z (GMT). No. of bitstreams: 1 Rafaela_Ana_Rech_Rodrigues.pdf: 3839276 bytes, checksum: 0e4c44f90332130f089ffc46bdc0853a (MD5) Previous issue date: 2011-08-03 / Planation surfaces mean the last stage in the reliefs evolution. In order to understand how was the evolution process and formation of the surfaces it becomes necessary to looking for information about the process soil formation related to the climate regime and the bedrock. The Southwest region of Parana and Northwest of Santa Catarina are characterized by a succession of remains of incompletely flattened surfaces, in which one of them stood out for having more than nine meters of weathered material. This study sought to characterize this remaining flat surface by its determining the weathering stage, macro and micromorphological characteristics of the pedon. In addition, there was the possibility of relating the evolution that surface with the etchplanation theory proposed by previous research. Physical analyses were carried as the, granulometry and tipics chemical, micromorphology, clay mineralogy, iron content and analytical chemistry. Therefore, the soil profile presented itself with more than nine meters of material exposed with diffuse transition and moderate A horizon (0 0,20 m), BW1 (0,20 to 1,40 m), Bw2 (1,40 2,50 m), B nític 1 and B nític 2 (2,50 to 8,70 m), BC (8,70 to 9,50 m) and CB (from 9,50 m). Through the microstructure it was observed the vertical transformation of the B horizon latosolic from nític B horizon. In the stage of weathering, mineralogical analysis, chemical and iron content have revealed that the soil profile studied is evolving to an advanced stage, in other words, from ferruginous to ferralitic. Such analysis, especially mineral, allowed to define the partial hydrolysis as the main process related to the formation and evolution of the soil. In this, there is a predominance of kaolinite (1:1), characterized by partial loss of silica (monossialitization) and by the vertical movement of materials. Therefore, we can confirm evolutionary compatibility with etchplanation theory. The occurrence of chemical weathering was possible due to weather conditions and rocky soil, basalt, promoting the vertical movement of materials, causing isovolumetric loss and thus the planation. / Superfícies aplainadas significam a última etapa da evolução de relevos. Para que se possa entender como foi o processo de gênese e evolução das mesmas se torna necessário buscar informações sobre os processos de formação dos solos relacionados ao regime climático e o substrato rochoso. As regiões Sudoeste do Paraná e Noroeste de Santa Catarina se caracterizam por uma sucessão de remanescentes de superfícies incompletamente aplainadas, no qual uma delas destaca-se por apresentar perfis de alteração com mais de nove metros de profundidade. Esse trabalho buscou caracterizar este remanescente de superfície aplainada através do seu estágio de intemperismo determinando, características macro e micromorfológicas do perfil de solo. Além disso, verificou-se a possibilidade de relacionar a evolução dessa superfície com a teoria da etchplanação proposta por pesquisas anteriores. Foram realizadas descrições macromorfológicas, granulometria, caracterização química de rotina, micromorfologia, mineralogia da fração argila, teores de ferro e química analítica. O perfil de alteração apresentou-se com mais de nove metros de material exposto com transição difusa e horizonte A moderado (0 0,20 m), Bw1 (0,20 1,40 m), Bw2 (1,40 2,50 m), B nítico 1 e B nítico 2 (2,50 8,70 m), BC (8,70 9,50 m) e CB (a partir de 9,50 m). Através da microestrutura verificou-se a transformação vertical do horizonte B latossólico a partir do horizonte B nítico. Quanto ao estágio de intemperismo, as análises mineralógica, química e teor de ferro permitiram afirmar que o perfil de solo estudado está evoluindo para um estágio avançado, ou seja, evoluindo de ferruginoso para ferralítico. Tais análises, principalmente a mineralógica, permitiram definir a hidrólise parcial como principal processo relacionado à formação e evolução deste solo, que apresenta predomínio de caolinita (1:1), caracterizando-se pela perda parcial de sílica (monossialitização) e pelo movimento vertical dos materiais. Diante disso, podese confirmar a compatibilidade evolutiva com a teoria da etchplanação. A ocorrência do intemperismo químico foi possível devido às condições climáticas e ao substrato rochoso, o basalto, promovendo a movimentação vertical dos materiais, gerando perda isovolumétrica e assim o aplainamento.

Made available in DSpace on 2017-05-12T14:42:48Z (GMT). No. of bitstreams: 1 Rafaela_Ana_Rech_Rodrigues.pdf: 3839276 bytes, checksum: 0e4c44f90332130f089ffc46bdc0853a (MD5) Previous issue date: 2011-08-03 / Planation surfaces mean the last stage in the reliefs evolution. In order to understand how was the evolution process and formation of the surfaces it becomes necessary to looking for information about the process soil formation related to the climate regime and the bedrock. The Southwest region of Parana and Northwest of Santa Catarina are characterized by a succession of remains of incompletely flattened surfaces, in which one of them stood out for having more than nine meters of weathered material. This study sought to characterize this remaining flat surface by its determining the weathering stage, macro and micromorphological characteristics of the pedon. In addition, there was the possibility of relating the evolution that surface with the etchplanation theory proposed by previous research. Physical analyses were carried as the, granulometry and tipics chemical, micromorphology, clay mineralogy, iron content and analytical chemistry. Therefore, the soil profile presented itself with more than nine meters of material exposed with diffuse transition and moderate A horizon (0 0,20 m), BW1 (0,20 to 1,40 m), Bw2 (1,40 2,50 m), B nític 1 and B nític 2 (2,50 to 8,70 m), BC (8,70 to 9,50 m) and CB (from 9,50 m). Through the microstructure it was observed the vertical transformation of the B horizon latosolic from nític B horizon. In the stage of weathering, mineralogical analysis, chemical and iron content have revealed that the soil profile studied is evolving to an advanced stage, in other words, from ferruginous to ferralitic. Such analysis, especially mineral, allowed to define the partial hydrolysis as the main process related to the formation and evolution of the soil. In this, there is a predominance of kaolinite (1:1), characterized by partial loss of silica (monossialitization) and by the vertical movement of materials. Therefore, we can confirm evolutionary compatibility with etchplanation theory. The occurrence of chemical weathering was possible due to weather conditions and rocky soil, basalt, promoting the vertical movement of materials, causing isovolumetric loss and thus the planation. / Superfícies aplainadas significam a última etapa da evolução de relevos. Para que se possa entender como foi o processo de gênese e evolução das mesmas se torna necessário buscar informações sobre os processos de formação dos solos relacionados ao regime climático e o substrato rochoso. As regiões Sudoeste do Paraná e Noroeste de Santa Catarina se caracterizam por uma sucessão de remanescentes de superfícies incompletamente aplainadas, no qual uma delas destaca-se por apresentar perfis de alteração com mais de nove metros de profundidade. Esse trabalho buscou caracterizar este remanescente de superfície aplainada através do seu estágio de intemperismo determinando, características macro e micromorfológicas do perfil de solo. Além disso, verificou-se a possibilidade de relacionar a evolução dessa superfície com a teoria da etchplanação proposta por pesquisas anteriores. Foram realizadas descrições macromorfológicas, granulometria, caracterização química de rotina, micromorfologia, mineralogia da fração argila, teores de ferro e química analítica. O perfil de alteração apresentou-se com mais de nove metros de material exposto com transição difusa e horizonte A moderado (0 0,20 m), Bw1 (0,20 1,40 m), Bw2 (1,40 2,50 m), B nítico 1 e B nítico 2 (2,50 8,70 m), BC (8,70 9,50 m) e CB (a partir de 9,50 m). Através da microestrutura verificou-se a transformação vertical do horizonte B latossólico a partir do horizonte B nítico. Quanto ao estágio de intemperismo, as análises mineralógica, química e teor de ferro permitiram afirmar que o perfil de solo estudado está evoluindo para um estágio avançado, ou seja, evoluindo de ferruginoso para ferralítico. Tais análises, principalmente a mineralógica, permitiram definir a hidrólise parcial como principal processo relacionado à formação e evolução deste solo, que apresenta predomínio de caolinita (1:1), caracterizando-se pela perda parcial de sílica (monossialitização) e pelo movimento vertical dos materiais. Diante disso, podese confirmar a compatibilidade evolutiva com a teoria da etchplanação. A ocorrência do intemperismo químico foi possível devido às condições climáticas e ao substrato rochoso, o basalto, promovendo a movimentação vertical dos materiais, gerando perda isovolumétrica e assim o aplainamento.

Remnants of planation surfaces in Hrubý Jeseník were noted in many geomorphological studies made in the studied area. However, the levels of planation surfaces were never described. The present study deals with the determination of the levels of planation surfaces (the amount of levels) and its connection to neotectonics. The whole area was divided into three parts (Pradědská, Keprnická and Orlická part). Histograms of elevation frequency, the cumulative graph of the area of planation surfaces and the statistical test show six levels of planation surfaces. Six levels were determined in Pradědská and Orlická part and four levels in Keprnická part. The levels of planation were compared to similar areas in the Sudetes. These intervals have significant representation of the flat surfaces within. Six levels of planation surfaces were determined. The main periods of uplift were presented based on the intervals between the levels of planation surfaces. The minimum uplift in the central, most active part is estimated to be 450 m.

Le Massif armoricain est un domaine de socle cadomo-varisque ouest-européen de faible altitude (maximum 400m), caractérisé par des surfaces d'aplanissement, dont l'évolution géologique et géomorphologique mésozoïque et cénozoïque est débattue. L'objectif de cette étude est de reconstituer la croissance du relief de ce massif. Une analyse géomorphologique, à terre et à mer, des surfaces d'aplanissement à été réalisée. Celle-ci est basée sur leur (i) cartographie, (i) chronologie relative, (iii) relations avec les profils d'altération et (iv) datation au moyen des dépôts sédimentaires datés les fossilisant. Six surfaces d'aplanissement ont été identifiées et datées et la plupart sont exhumées. Elles sont d'âge anté-Jurassique inférieur (PS1 à PS3), anté-Jurassique moyen (PS4), ante-Crétacé inférieur (PS5) et Paléocène (PS6). Au moins deux phases d'enfouissement/exhumation ont été identifiées : (1) un enfouissement au cours du Jurassique suivi d'une exhumation au Crétacé inférieur et (2) un enfouissement au Crétacé supérieur suivi d'une dénudation du Crétacé terminal à l'Éocène inférieur. La première période d'exhumation est probablement reliée à l'initiation puis l'ouverture du rift entre les paques Ibérie et Eurasie (Golfe de Gascogne) et la seconde à la convergence entre ces deux plaques. Enfin, les mouvements verticaux cénozoïque du massif ont été quantifiés à partir (i) de la position des sédiments marins datés et de milieu de sédimentation connus et (ii) des paléoniveaux marins respectifs de ces dépôts déduits de différentes chartes eustatiques. Ces travaux mettent en évidence (i) une surrection au Paléocène, (ii) une susidence à l'Éocène supérieur et (iii) la surrection déjà caractérisée au Pléistocène. / The Armoricain massif is a west-european Cadomo-variscan domain of low altitude (maximum 400 m), characterized by planation surfaces, whose Mesozoic and Cenozoic geological and geomorphological evolution is still debated. The purpose of this study is to retrace the growth of this relief. A geomorphological analysis of the planation surfaces was performed on land and at sea. It is based on their (i) mapping, (ii) relative chronology, (iii) relationships with weathering mantles and (iv) dating using dated sediments that seal those them. Six stepped planation surfaces have been identified and mapped and most of them are exhumed. They are pre-early Jurassic (PS1 to PS3), pre-middle Jurassic (PS4), pre-late Cretaceous (PS5) and Paleocene (PS6). At least two phases of burial and exhumation have been identified: (1) burial in Jurassic time followed by denudation during the early Cretaceous and (2) burial in late Cretaceous time followed dy denudation during the latest Cretaceous to early Eocene. The first period of exhumation is probably related to the initiation and break-up of the rift between Iberia and Eurasia (Bay of Biscay) and the second to the convergence betwenn these two plates. At last, Cenozoic vertical movements of the massif have been quantified from (i) position of dated marine sediments of known depositional environment and (ii) their respective paleo-sea levels deduced from different eustatic charts. This work highlights (i) Paleocene uplift, (ii) late Eocene subsidence and (iii) the already characterized Pleistocene uplift.