Morfotectônica Da Bacia Sedimentar De Curitiba

Abstract

MORPHOTECTONICS OF THE CURITIBA SEDIMENTARY BASIN The morphostructural framework differentiation in the Precambrian/Eo-Paleozoic basement and Cenozoic sedimentary cover of the Metropolitan Area of Curitiba is due to extensional and transtensional neotectonic movements, with the concurrence of climatic changes. Drainage morphometric analysis indicates tectonic influence in the morphogenetic processes. Structural alignments control the sub-rectangular and sub-parallel patterns of the drainage system, the asymmetry of the second-order drainage sub-basins of the Iguaçu basin river, the main local base level, and the geometry of the Cenozoic sediments, including the alluvial deposits, which present asymmetric spatial distribution and narrowing segments in areas of crossed-alignments. The main second order tributaries of the Iguaçu river, like the Pequeno and Barigüi rivers, present tectonically controlled channels, as indicated by the coincidence of anomalies with older structures reactivated since the Lower Tertiary, as well as scarps that may be clearly observed in digital elevation models, even not so accentuated. The higher northnorthwestern margin inclination of the Iguaçu River in relation to its south-southeastern margin is a salient morphostructural characteristic related with the Upper Iguaçu Fault, which deformed the Curitiba sedimentary basin and to which part of the upper Iguaçu valley is adjusted. The fault was active during and after the Pleistocene, reflecting the more recent neotectonic activity, and may be recognized through the faulted colluvial-alluvial deposits and the weak seismic activities in the Serra do Mar.

Aggregate Stability in Soil with Humic and Histic Horizons in a Toposequence under Araucaria Forest

“…This geologic formation belongs to the Cenozoic Era, with ages ranging from the Miocene to Pleistocene (Salamuni and Stellfeld, 2001;Salamuni et al, 2004). According to Köppen classification system, the climate is classified as Cfb -subtropical humid with moderate winters and mild summers, with annual average rainfall ranging from 1,500 to 1,600 mm and an average temperature of 19.1 °C (Maack, 2012).…”

Mudanças na dinâmica fluvial da bacia hidrográfica do Ribeirão Araquá: eventos tectônicos e climáticos no quaternário

“…Ar = área correspondente à margem direita da bacia At = área total da bacia De acordo com Salamuni, Ebert e Hasui (2004), os valores de FABD iguais ou próxi-mos a 50 sugerem pouca ou nenhuma atividade tectônica, enquanto os acima de 50 indicam um provável basculamento da margem direita do rio e os inferiores sugerem um provável basculamento da margem esquerda.…”

Características Hidráulicas Das Camadas Aqüíferas Da Formação Guabirotuba E O Potencial Explotável Na Região Da Bacia Do Iraí, Curitiba - Paraná.

“…cit., interpretam essas ocorrências como conseqüência de uma deposição em ambiente fluvial meandrante com sucessivos ciclos recorrentes de regime de baixa e elevada energia. Dentre outros trabalhos, igualmente relevantes sobre o assunto, destacam-se OLIVEIRA e LEONARDOS (1943), MAACK (1947), ALMEIDA (1952), COUTINHO (1955), BIGARELLA & SALAMUNI (1952a;1959;, BIGARELLA J.J.; AB SABER & BIGARELLA (1961), BIGARELLA (1971), LOPES (1966), MURATORI (1966), MARINI (1967), FUCK (19661967a), TREIN (1969), BERG e LOURENÇO (1973), BECKER (1982), PETRI & FULFARO (1983), SALAMUNI (1988) e SALAMUNI e STELLFELD (2001).…”