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Boya, Duocastella Salvador. "El sistema deltaico de la Arenisca de Sabiñánigo y la continentalización de la cuenca de Jaca". Doctoral thesis, Universitat Autònoma de Barcelona, 2018. http://hdl.handle.net/10803/665452.
Pełny tekst źródłaThe Jaca basin is an exceptional example of sedimentary infill of a piggyback basin. Its stratigraphic record shows the evolution from deep-marine environments during the lower Eocene until the its evolution to the transitional and terrestrial environments that represent de last stage of the basin fill during the upper Eocene-Miocene. This features, and the excellent exposure of the outcrops, allow to highlight this basin as an excellent analog in many studies related to sedimentary geology. In this thesis, a review of the delta and alluvial formations of the Jaca basin, classically defined in a descriptive sence, has been carried out in order to establish genetic depositional systems based on basin scale indicators. In order to achieve this goal a methodology based on the elaboration of a geological cartography and facies analysis has been applied, this last one, focused chiefly on the deltaic units related to the Sabiñánigo Sandstone delta system. Through the combination of both techniques, 8 depositional systems have been differentiated in the Jaca basin. Among these 8 depositional systems, the deltaic depositional ones (Bartonian to Priabonian) stand out as complex systems due the present-day lack of physical correlation in the basin between the Jaca and Fiscal sectors. From the integration of stratigraphic field data obtained in this thesis, with paleomagnetic and biostratigraphic data from the literature, it has been possible to establish an equivalence between the deltaic systems in the central Jaca sector (central part of the basin) and those of the Fiscal sector (eastern part of the basin). These equivalences allow establishing a new correlation between both sectors which allows to propose younger age range for the Fiscal units. Deltaic depositional systems analysis has been here focused in more detail on the Sabiñánigo Sandstone delta system, whose excellent quality in terms of exposure, connection and extension of its outcrops, has allowed to carry out an exhaustive facies study. Facies analysis has permitted to characterize this delta as a flood-dominated delta derived from hyperpycnal flows sourced from the north of the Jaca basin. During transgressive periods, the hyperpycnal sediments where reworked by tidal processes which developed systems of tidal bars. Synchronously, in the Fiscal sector, the upper San Felices delta system was formed as an inertia dominated delta. This system, with an eastern provenance signal, interacted with the north-derived deltas in the Jaca sector. This interaction is displayed by the recording of an eastern provenance signal in the tidal sediments, and also by the occurrence of outer shelf deposits in the southern flank of the Basa anticline. Finally, it has been possible to identify a tectonic control in the deltaic cyclicity of these systems. The deltaic system of Sabiñánigo shows growth strata which can be linked to the activity of the Otúria thrust. In the same way, the upper San Felices delta system shows growth strata in its eastern edge related to the growth of the Boltaña anticline. The active stages of each of these structures produced an alteration in the accommodation rate, generating episodes of forced transgression in the deltaic systems. In this work, the importance of detailed facies analysis is highlighted as a key tool to infer the different factors that can modify the architecture style of sedimentary systems in an active tectonic context, such as the South Pyrenean basin. In addition, this thesis presents the deltaic system of the Sabiñánigo Sandstone delta system as an excellent field analog of a flood dominated.
Speranza, Flavio Cesar. "Variabilidad paleoclimática y cambios paleoambientales en la región Chaqueña semiárida Argentina". Doctoral thesis, Universitat Autònoma de Barcelona, 2020. http://hdl.handle.net/10803/670872.
Pełny tekst źródłaLos estudios paleoclimáticos y paleoambientales del holoceno proporcionan información relevante sobre las tendencias climáticas a largo plazo necesarias para generar y probar hipótesis sobre patrones y modelos climáticos y entender los cambios ambientales recientes. Si bien hay un número creciente de este tipo de estudios en América del Sur, todavía existen extensas regiones que no cuentan con estudios detallados y de alta resolución, tal como sucede en el Chaco semiárido. El presente trabajo constituye un aporte significativo para reducir la brecha espacial de información de la variabilidad paleoclimática, la dinámica del paisaje y la transformación paleoambiental, a distintas escalas espaciales y temporales, durante los últimos siglos en la región semiárida del Chaco argentino, mediante la vinculación y articulación de una significativa cantidad y diversidad de indicadores. Se llevaron a cabo estudios fluviomorfológicos, geomorfológicos y secuencias sedimentarias mineralógicas y texturales de paleocauces en la cuenca baja del río Bermejo, principal modelador del paisaje de la llanura chaqueña semiárida; análisis de registros multiparamétricos sedimentológicos de alta resolución (litología, geoquímica, mineralogía) y palinológicos de sedimentos lacustres de Laguna Yema; construcción y análisis de cronologías de ancho de anillos de la especie arbórea Schinopsis lorentzii, ubicados en un gradiente latitudinal (Norte-Sur) en la región chaqueña semiárida de Argentina y, complementariamente, se emplearon bases de datos de estaciones meteorológicas e hidrométricas dispuestas en el área de estudio. Nuestros resultados e interpretaciones constituyen herramientas para ser empleadas en la gestión integrada de recursos hídricos en la región chaqueña semiárida, en donde la deficiencia en la disponibilidad de agua para la producción y consumo humano y las inundaciones son unas de las principales amenazas de la región. Adicionalmente, nuestro trabajo constituye un insumo para la gestión del ordenamiento ambiental y productivo del territorio, en donde el avance de la frontera agropecuaria para el desarrollo de cultivos extensivos es el principal fenómeno de cambio en la cobertura del suelo, siendo su sustentabilidad altamente dependiente de las variaciones y estacionalidad climática.
Paleoclimatic and paleoenvironmental studies of the Holocene provide relevant information regarding climatic trends in the long-term, necessaries to generate and test hypothesis on climatic patterns and models, as well as understanding recent environmental changes. While an increasing number of these type of studies are being developed in South America, there are still large regions that do not have detailed and high resolution studies, as in the case of the semi-arid Chaco. This work constitutes a significant contribution in order to reduce the spatial information gap regarding paleoclimatic variability, landscape dynamics, and paleoenvironmental transformations, at different spatial and temporal scales, during the last centuries in the semi-arid region of Argentinian Chaco, through the linkage and articulation of a significant amount and diversity of indicators. A series of studies were conducted, including fluvialmorphological, geomorphological, and textural and mineralogical sedimentary sequences in the lower basin of the Bermejo River, the main landscape modeler of the semi-arid plains in Chaco; analysis of multi-parametric sedimentological records of high-resolution (lithology, geochemistry, mineralogy) and palynological from lake sediments in Laguna Yema; construction and analysis of tree-ring width chronologies of Schinopsis lorentzii, mainly located in an altitudinal gradient (North-South) of the semi-arid Chaco region in Argentina and, as a complement, databases from meteorological and hydrometric stations arranged in the study are were also consulted. Our results and interpretations constitute tools to be employed in the integrated management of hydric resources in the semi-arid Chaco, where deficiency in water availability for production and human consumption, as well as floods, are one of the main threats in the region. In addition to that, our investigation constitutes an input for the environmental and productive management of the territory, where the advance of the agricultural border for the development of extensive crops is the main change phenomenon in soil coverage, with a sustainability highly dependent of climatic variations and seasonality.
Menezes, Priscila Melo Leal. "Análise de fácies e proveniência sedimentar em sambaquis do litoral centro-sul de Santa Catarina". Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/44/44141/tde-19082009-102541/.
Pełny tekst źródłaThe sambaquis (also known as shell mounds or shell middens) in the Brazilian southern coast are landscape references and bear historical and scientific value. They are predominantly constituted of mollusk shells and sediments and also hold a sound presence of organic matter, piled up in different stratigraphic configurations. In this work, three sambaquis in the central-southern coast of the Santa Catarina state have been chosen as objects of study. They present two distinct configuration types: on one hand, the Carniça III and the Encantadas III, and, on the other hand, the Jabuticabeira II, which is larger and stratigraphically more complex. The proposal is to assist on the reconstruction of habits and traditions of the people who lived in this coastal area during a great part of the Holocene period (before the Portuguese navigators arrived in Brazil in 1500), and to infer their relations with the evolution of the surrounding geological environment. Two main goals have been set for this purpose: the application of facies analysis and depositional architecture in the selected sambaquis; and the investigation of the use of sediments from paleo-lagoons as their construction material. In order to achieve these goals, a multi-analytical approach has been used comprising: facies analysis; quantity evaluation of organic matter and carbonates associated with phosphates; characterization of the thick fraction in stereomicroscope; granulometry; heavy grains mineralogy; petrographic and micromorphological study of the thin section; scanning electron microscopy (SEM); and both carbon and nitrogen geochemistry and isotopy. The stratigraphy of the Carniça III and Encantada III sambaquis is composed of a sandy nucleus covered with a black organic layer full of shells and anthropic artifacts (black soil, represented as LA facies). In contrast, the Jabuticabeira II sambaqui is characterized by an assorted sequence of shell layers and thin black layers containing burial remains (funerary facies, represented as Lc) covered by black soil, and full of artifacts and burials. According to the facies analysis results, three associations have been found in this sambaqui, from bottom to top: muddy-gravel, muddy-sand and sandy-gravel. The vertical sequence of these associations reflects the progressive aggradation of the lagoon system and it establishes, thus, the relation between the sambaqui and the surrounding depositional environment. The facies associations, in any hierarchy, are limited by the thin layers in the Lc facies. The analysis of the construction materials used in the sambaquis has set their provenance in the nearest depositional features to the sites, represented by the lagoon bottom, margin and swamp for the Jabuticabeira II and Encantada III sambaquis, and by coastal lagoon barriers and superimposed wind dunes for the Carniça III site. The granulometric parameters and the heavy minerals indexes have showed control, mainly geographic, in their distribution. The analysis of phosphate components associated with the carbon and nitrogen isotopic signals shows great anthropic processing in the material which constitutes the funerary and the black soil layers found in the Jabuticabeira II sambaqui, with putrid organic matter characteristics, a probable waste from the day-by-day processing of the people who built the sambaquis. On the contrary, this kind of processing is supposed to have been much lower in the Carniça III and the Encantada III sambaquis.
Rossi, Adriana Rost. "Caracterização paleoambiental a partir dos componentes orgânicos particulados em depósitos bioturbados do Bloco Central da Jazida Carbonífera do Iruí (Cachoeira do Sul, RS)". Universidade do Vale do Rio do Sinos, 2008. http://www.repositorio.jesuita.org.br/handle/UNISINOS/2191.
Pełny tekst źródłaCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
A análise integrada entre a sedimentologia e a paleoicnologia da Formação Rio Bonito e da base da Formação Palermo (bacia do Paraná) na região de Cachoeira do Sul (RS) vem demonstrando a presença de depósitos flúvio-estuarinos dominados por marés na porção inferior da Formação Rio Bonito, passando a estuarinos dominados por ondas no topo e rapidamente dando lugar a depósitos marinhos rasos (base da Formação Palermo). Visando validar e, se possível, refinar essas interpretações, foi realizada uma análise paleopalinológica de alta resolução dos depósitos bioturbados. Para tanto, foram selecionadas 26 amostras nos testemunhos de sondagem IC-07-RS, IC-44-RS, IC-03-RS e IC-12-RS, pertencentes ao bloco central da jazida carbonífera de Iruí (Cachoeira do Sul, RS), quando da análise paleoicnológica. Das amostras inicialmente coletadas, foram utilizadas para a análise paleopalinológica apenas as de natureza pelítica, de forma a homogeneizar possíveis disparidades na assembléia orgânica decorrentes de granulometri
The integrated analysis of sedimentology and paleoichnology of the Rio Bonito Formation and the lower part of Palermo Formation (Paraná Basin) in Cachoeira do Sul region (Rio Grande do Sul State, south Brazil) revealed that the Rio Bonito Formation are characterized at the base by tide-dominated fluvio-estuarine deposits, changing upward to wave-dominated estuarine deposits, which are overlapped by the shallow marine deposits of the Palermo Formation. With the aim of refine such interpretations, a high-resolution paleopalynologic analysis of the bioturbed deposits is conducted in this study. Thus, 26 samples were selected from the cores IC-07-RS, IC-44-RS, IC-03-RS and IC-12-RS, from the central area of the Iruí Quarry (Cachoeira do Sul). Only mudstones and siltstones samples were used for the paleopalynologic analysis, in order to homogenize possible disparities in the organic assemblage due to the grain-size. Paleopalynomorph and palynofacies samples were prepared following the traditional methods for Pa
Sellén, Emma. "Quaternary paleoceanography of the Arctic Ocean : A study of sediment stratigraphy and physical properties". Doctoral thesis, Stockholms universitet, Institutionen för geologi och geokemi, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-30895.
Pełny tekst źródłaAt the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 3: In progress. Paper 4: In progress. Paper 5: In progress. Paper 6: In progress.
Tognoli, Francisco Manoel Wohnrath [UNESP]. "Estratigrafia das seqüências deposicionais do grupo Guatá, borda leste da Bacia do Paraná". Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/102978.
Pełny tekst źródłaAgência Nacional do Petróleo, Gás Natural e Biocombustíveis (ANP)
O Grupo Guatá foi alvo de um estudo detalhado ao longo de toda a borda leste da Bacia do Paraná. Por meio da análise e descrição seqüencial de testemunhos e integração com dados de perfis, aproximadamente 100 poços foram analisados desde o norte do Estado do Paraná até a região centro-sul de Santa Catarina. As fácies foram agrupadas em sucessões de fácies, a partir das quais foram definidos os padrões de empilhamento do tipo progradante, retrogradante e agradante, que em conjunto definem os tratos de sistemas e conseqüentemente as seqüências deposicionais. Além disso, foi realizado um estudo de integração entre sedimentologia, icnologia e geoquímica, que definiu critérios para a identificação e interpretação de superfícies com significado estratigráfico regional. Isso possibilitou correlacionar com segurança poços ao longo de toda a borda leste da Bacia do Paraná e mapear a distribuição das seqüências deposicionais de 3ª.e 4ª ordens. O arcabouço estratigráfico revelou que as seqüências são formadas pelos tratos de sistemas transgressivo e de mar alto ou apenas pelo trato de sistemas transgressivo. Notou-se também que as seqüências estão diretamente vinculadas aos principais lineamentos estruturais da bacia. Interpreta-se que as seqüências 1, 2, 3, 4 e 5 foram soerguidas ao longo de toda a borda leste da Bacia do Paraná, com sua expressão máxima na região do Arco de Ponta Grossa. Esse soerguimento gerou uma discordância angular com expressão regional sobre a qual foram depositadas as seqüências 6, 7 e 8. A seqüência 8 é marcada por subsidência entre os Alinhamentos do Rio Piquiri e São Jerônimo-Curiúva, contemporânea à deposição dos tratos de sistemas transgressivo e de trato de mar alto.
The Guatá Group was target of a detailed study along the eastern border of the Paraná Basin. Using integration of core description and well logs, approximately 100 wells were analyzed in Paraná and Santa Catarina states. Facies were grouped in facies successions, which allowed the recognition of the progradational, retrogradational and aggradational stacking patterns and, consequently, system tracts and depositional sequences. Moreover, it was performed an integration among sedimentology, ichnology and geochemistry as a way to obtain criteria for identifying and interpreting regional stratigraphic surfaces. This allowed a detailed correlation along the eastern border of Paraná Basin and the mapping of third and fourth order sequences. The stratigraphic framework has revealed sequences formed either by the transgressive and highstand system tracts or just by the transgressive one. The sequences are directly linked to the main structural linements of the basin. It is interpreted that sequences 1, 2, 3, 4 and 5 were uplifted along the eastern border of the basin, with the maximum expression in the region of the Ponta Grossa Arch. An angular unconformity was generated and sequences 6, 7 and 8 were deposited later in time. Sequence 8 was affected by subsidence between the Rio Piquiri and São Jerônimo-Curiúva linements, contemporaneous to deposition of the transgressive and highstand system tracts.
Ferreira, Manuela Pinheiro. "Geocronologia e proveniência dos sedimentos holocênicos da confluência dos rios Negro e Solimões, AM". Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/44/44141/tde-14112013-102806/.
Pełny tekst źródłaThe Amazon river system is the largest sediment catchment basin in the world. In this context, this study aims to differentiate the sands carried by the Negro and Solimões rivers and estimate the sandy sedimentary supply derived from these two rivers to the Amazon river. Furthermore, this research also deals with temporal variations of fluvial geomorphology in the confluence area of the Negro and Solimões rivers. For this purpose, we used methods of geomorphological, facies and grain size analysis coupled with optically stimulated luminescence (OSL) sensitivity of sand fraction and OSL and 14 C dating. The sediments of the Negro river bars showed a higher percentage of sand, with mean diameter of 375,76 µm, which are dominated by quartz grains with moderate OSL sensitivity (3,06). On the other hand, sediment from bars of Solimões and Amazonas rivers are thinner, with mean diameter of 154,58 µm and 134,36 µm, respectively, high percentage of feldspar and quartz grains with low OSL sensitivity (2,49 and 2,53, respectively). The contribution of Solimões river sands (98.23%) to the Amazon river is dominant in relation to the contribution of the Negro river (1.76%). OSL sensitivity data suggest that the Negro river sediments are accommodated mainly in the Amazon River channel. The Alter of Chão Formation sandstones outcropping adjacent to the lower Negro river channel area represent the main source of sediments for this sector of the Negro river. The low compositional maturity and reduced OSL sensitivity of Solimões river sediments suggest rapid sediment transport from Andean source areas. The minimum storage time for the Negro river sand bars exposed during the dry season varies between 0,34 ± 0,04 ky and 1,7 ± 0,26 ky. The minimum storage time of sands in bars from the Solimões and Amazonas rivers ranged between 1,3 ± 0,21 ky and 11,9 ± 1,18 ky. The main construction phases of the Solimões and Amazonas rivers bars would be related to extreme precipitation events during the Holocene.
Martins, Patrícia Diniz. "Estimativa da concentração de sedimentos utilizando a teoria da entropia". Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/18/18139/tde-12122016-112951/.
Pełny tekst źródłaThe concern about quality of water has been promoting the development of each day better monitoring and control techniques. As sediments transport most water contaminants, their study is fundamental. Given the large number of variables for determining sediment concentration and high costs of monitoring campaigns, it becomes necessary to develop more accessible methods which bring satisfactory practical results. Therefore, this work deals with application of the theory of entropy, a probabilistic method to determine concentration of sediments in river channels with various concentrations and particle sizes. For this purpose, it was proposed a relationship between the theory of entropy parameters in order to reduce the computational effort. The results were satisfactory at concentrations above 10 g/L with R² greater than 0.88. The calculated squared errors in this study were lower than those found when using the theory of entropy by Tsallis and the equation of Rouse, classic models for determining the sediment concentration profile. The technique was also applied to downstream and inside the Mogi reservoir. It can be observed that it is possible to apply the theory of entropy to simulate sediment concentration profile of reservoirs, since the use of the relationship between parameters facilitates calculations, reduces the number of modeled parameters and consequently the computational effort as well as better represents the variation of sediment concentration along the profile. The applicability of the proposed model and the ease of using the probabilistic method, since it does not need provide data of hydraulic bed conditions not even grain size, make it feasible.
Herries, Robert David. "Sedimentology of continental erg-margin interactions". Thesis, University of Aberdeen, 1992. http://digitool.abdn.ac.uk/R?func=search-advanced-go&find_code1=WSN&request1=AAIU045051.
Pełny tekst źródłaGodoy, Mario Duarte Pinto. "MudanÃas na sedimentaÃÃo no estuÃrio do rio Jaguaribe (CE) devido a mudanÃas nos usos do solo". Universidade Federal do CearÃ, 2011. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=5972.
Pełny tekst źródłaThe Jaguaribe river is the river with the biggest whatershed of Cearà and has a catchment area of 75,000 km  which occupies over 50% of the state, however, land use changes that occurred in the watershed of this river and global climate change could be causing the decrease of the depth of the estuary which can make impossible for ship to navigate in the estuary and affect the aquatic fauna. The focus of this study is the deposited sediment in islands within the estuary and the surrounding areas which were considered as possible sources of sediment to these islands. The sampling plan consisted in 6 point within the estuary of the Jaguaribe river where were taken sediment cores and further 8 points where were taken superficial sediment from the bottom of the river, from areas in the margin of the estuary and from the dune fields near the estuary. The sampling locals were chosen based on the mapping of the estuary, this mapping used images from the satellites Landsat 5, Quickbird II and Kompsat 2 and cover the period of time between the years of 1988 and 2008. This mapping showed that the existing islands in the estuary suffered great changes during this period, overall there was an increase of 31.5 hectares in the area colonized by mangrove vegetation in the islands. The period of greatest growth was the period between 1992 and 2003 where there was an increase of 6 hectares with a speed of 2.1 hectare per year. In addition to mapping was performed an estimative of sediment load from various land uses in the watershed of the lower estuary, the estimative showed that the main activities that contribute sediment to the estuary is agriculture (282,322 t / year), with the main contribution being from plantations of beans, cassava and corn. Following are the urban areas (115,076 t / year), the shrimp farms (13,475 t / year) and livestock (1,374 t / year). Unlike all the other activities found in the study area, shrimp farming is the only activity in which the sediment load is released directly into the estuary. The diameter of the sediment from the samples showed a predominance of sand on the other classes and also showed that in a same profile may be different types of sediment, with layers with large amounts of silt and clay and layers formed primarily of coarser grains, the appearance of this sediment is similar from the sediment removed from the margin of the estuary and indicates that the several areas of erosion found scattered along the margin of the river may be possible source of great importance within this context.
Tognoli, Francisco Manoel Wohnrath. "Estratigrafia das seqüências deposicionais do grupo Guatá, borda leste da Bacia do Paraná /". Rio Claro : [s.n.], 2006. http://hdl.handle.net/11449/102978.
Pełny tekst źródłaBanca: Ricardo da Cunha Lopes
Banca: Jorge Hachiro
Banca: Antonio Roberto Saad
Banca: José alexandre de Jesus Perinotto
Resumo: O Grupo Guatá foi alvo de um estudo detalhado ao longo de toda a borda leste da Bacia do Paraná. Por meio da análise e descrição seqüencial de testemunhos e integração com dados de perfis, aproximadamente 100 poços foram analisados desde o norte do Estado do Paraná até a região centro-sul de Santa Catarina. As fácies foram agrupadas em sucessões de fácies, a partir das quais foram definidos os padrões de empilhamento do tipo progradante, retrogradante e agradante, que em conjunto definem os tratos de sistemas e conseqüentemente as seqüências deposicionais. Além disso, foi realizado um estudo de integração entre sedimentologia, icnologia e geoquímica, que definiu critérios para a identificação e interpretação de superfícies com significado estratigráfico regional. Isso possibilitou correlacionar com segurança poços ao longo de toda a borda leste da Bacia do Paraná e mapear a distribuição das seqüências deposicionais de 3ª.e 4ª ordens. O arcabouço estratigráfico revelou que as seqüências são formadas pelos tratos de sistemas transgressivo e de mar alto ou apenas pelo trato de sistemas transgressivo. Notou-se também que as seqüências estão diretamente vinculadas aos principais lineamentos estruturais da bacia. Interpreta-se que as seqüências 1, 2, 3, 4 e 5 foram soerguidas ao longo de toda a borda leste da Bacia do Paraná, com sua expressão máxima na região do Arco de Ponta Grossa. Esse soerguimento gerou uma discordância angular com expressão regional sobre a qual foram depositadas as seqüências 6, 7 e 8. A seqüência 8 é marcada por subsidência entre os Alinhamentos do Rio Piquiri e São Jerônimo-Curiúva, contemporânea à deposição dos tratos de sistemas transgressivo e de trato de mar alto.
Abstract: The Guatá Group was target of a detailed study along the eastern border of the Paraná Basin. Using integration of core description and well logs, approximately 100 wells were analyzed in Paraná and Santa Catarina states. Facies were grouped in facies successions, which allowed the recognition of the progradational, retrogradational and aggradational stacking patterns and, consequently, system tracts and depositional sequences. Moreover, it was performed an integration among sedimentology, ichnology and geochemistry as a way to obtain criteria for identifying and interpreting regional stratigraphic surfaces. This allowed a detailed correlation along the eastern border of Paraná Basin and the mapping of third and fourth order sequences. The stratigraphic framework has revealed sequences formed either by the transgressive and highstand system tracts or just by the transgressive one. The sequences are directly linked to the main structural linements of the basin. It is interpreted that sequences 1, 2, 3, 4 and 5 were uplifted along the eastern border of the basin, with the maximum expression in the region of the Ponta Grossa Arch. An angular unconformity was generated and sequences 6, 7 and 8 were deposited later in time. Sequence 8 was affected by subsidence between the Rio Piquiri and São Jerônimo-Curiúva linements, contemporaneous to deposition of the transgressive and highstand system tracts.
Doutor
Flathers, Joshua. "The Role of Basin Configuration and Allogenic Controls on the Stratigraphic Evolution of River Mouth Bars". ScholarWorks@UNO, 2018. https://scholarworks.uno.edu/td/2462.
Pełny tekst źródłaFarvardini, Mandana. "The Sedimentological Distribution of Upper Brent, Oseberg field, North Sea". Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-312874.
Pełny tekst źródłaMillson, John Alan. "The sedimentology of the Celtic Sea Jurassic". Thesis, Cardiff University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.303025.
Pełny tekst źródłaSiqueira, Eliane de. "\"História ecológica da floresta de Araucária durante o Quaternário Tardio no setor sul da serra da Mantiqueira: análises sedimentológicas e palinológicas na região de Monte Verde (MG)\"". Universidade de São Paulo, 2006. http://www.teses.usp.br/teses/disponiveis/44/44140/tde-21032007-145459/.
Pełny tekst źródłaLow annual average temperature (< 18ºC), the localization in a zone of high altitude (> 1500 m) and high floristic diversity, representative of the southern part of the Serra da Mantiqueira highlands, turn the Monte Verde region (city of Camanducaia, Southeast of the State of Minas Gerais), propitious for the inquiry of Late Quaternary climatic changes, the aim of this dissertation. The objective of the study is to analyze and describe the paleofloristic succession based on palynology, integrated with sedimentological (grain size and heavy mineral analysis), geochemical (quantification of organic matter) and geochronological (14C AMS dating) data. The sampled area is located at the left margin of the Cadetes stream, a tributary of the Jaguari River. A 2.10 m long sediment core was collected on the fluvial valley with a vibrocore equipment. The sandy-clay sediments show a high organic content and are similar in appearance to peatbog deposits. The sedimentological analysis demonstrate the occurrence of gradual and cyclic variations related to the change in incoming of terrigenous biodetrital/organic sediments, controlled by alterations in the type of depositional process, and, therefore, possibly by the vegetation cover. All these changes were possibly influenced by climatic oscillations of the Late Quaternary. The five 14C AMS dates obtained encompass the period between 20830-20370 14C cal. A.P. (100 cm of depth) and 2,350-2,150 years 14C cal. A.P. (10 cm). The palynological results indicate that in the last 20,000 years the landscape was characterized by Araucaria angustifolia forest under predominantly cold and humid climates, with minor oscillations of humidity. Four pollen phases had been identified, with extrapolated ages for paleoclimatic inferences. The first one corresponds to the interval between 17,000 and 15,000 years A.P. with oscillation of the forest cover under cold and humid climate. Between 15,000 and 9,000 years A.P., there is an increase of humidity and reduction of tractive sedimentary supply. The third interval corresponds to the period between 9,000 and 8,000 years A.P. with a decrease in humidity and increase of the sedimentation rate. In the last 8,000 years A.P. Araucaria forest was maintained under cold and humid climatic conditions, as it did during the Late Pleistocene.
Junior, Daniel Rodrigues do Nascimento. "Evolução sedimentar holocênica do delta do rio Tubarão, Estado de Santa Catarina". Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/44/44141/tde-26072011-145300/.
Pełny tekst źródłaThe Tubarão river delta, located on the centre-south coast of Santa Catarina State, among the municipalities of Tubarão, Jaguaruna and Laguna, is rare example of active lagoonal delta in Brazil. Its delta plain covers an area of about 250km2, where there are evidences of migration of fluvial channels in a set of truncations of ancient distributaries, some of these still in activity. Ten cores were acquired adjacent to the main distributary channels of the Tubarão river, from which analyses of facies, grain size, heavy minerals, organic matter, chemistry-isotope ratios, and radiocarbon datings were performed. Also, aerial photographies and data of subsurface mining were surveyed from historical collections. Thereabout 5,000 years ago, in the region of its apex, near Capivari de Baixo tributary river, the Tubarão river delta entered an ancient lagoonal bay and branched seven main distributaries. Since the beginning of its migration, these distributaries were controlled by autogenic avulsions towards ancient depressions in the bottom of the basin. Initially, these avulsions prograded the delta towards SW, afterwards to ENE, and then to NNE, favoring the fragmentation of the ancient lagoonal bay in a set of smaller lakes and lagoons. Faced with this dynamical scenario, shellmounds were erected surrounding the lagoon system, composing important archaeological records of the interaction between sedimentary evolution and prehistoric human occupation. The results of the grain size analysis showed that the deltaic sedimentation, in the vicinity of slopes of hills, was mixed with colluvium and/or gravity flow deposits, that is evidenced by the presence of texturally very immature intervals in some cores. The analysis of heavy minerals, by its turn, showed that the main controlling factor in the variations of its assemblage in deposits of delta and basin is the sedimentary provenance. In terms of mediate sources, this provenance reflects plutonic and metamorphic (medium to high grade) rocks of the Florianópolis batholith (including its xenoliths) and of the Granite-Gneiss Complex, and weathered sedimentary sandstones of the Palaeozoic Paraná basin. Regarding immediate sources, deltaic deposits stand out by its mineralogical affinity with sands of the Tubarão river, mainly by the mutual presence of weathered grains of kyanite and staurolite, whereas deposits of the lagoon have mineralogical similarity with the sands of Braço do Norte and Capivari de Baixo tributary rivers, especially in relation to the presence of zircon. The origin of the organic matter found in the deposits of the delta and in its lagoonal basin is both from sedimentary input of terrestrial sources (provided by rivers) and marine (brought via inlets), fact evidenced by results of \'delta\'\'POT.13 C\', \'delta\'\' POT.15 N\', and \'C IND.ORG\'/\'N IND. TOTAL\' ratio. Particularly, in the sediments of the basin, variations between different types of organic matter have occurred during the Holocene, and are attributed both to the progressive physical isolament of the lagoon system from the open sea, and by local climate change (pronounced augment of precipitation). The isotope analyses of oxygen (\'delta\'\'POT.18 O\') of molluskan shells from the deposits of the basin present relative enrichment in \'ANTPOT.16 O\' during the Holocene. This result, as well as the one from isotope analyses of carbon and nitrogen of sediments, suggests gradual isolation of the lagoonal waters of influence of waters from the open sea.
Ramos, Ordoño Adrià. "Post-Hercynian tectonic and paleogeographic evolution of SW Iberia and the Gulf of Cadiz". Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/436893.
Pełny tekst źródłaO'Connell, Brennan. "Sedimentology and depositional history of the Miocene-Pliocene southern Bouse Formation, Arizona and California". Thesis, University of Oregon, 2017. http://hdl.handle.net/1794/22300.
Pełny tekst źródłaSiegle, Eduardo. "Sediment transport and morphodynamics at an estuary mouth : a study using coupled remote sensing and numerical modelling". Thesis, University of Plymouth, 2003. http://hdl.handle.net/10026.1/712.
Pełny tekst źródłaOwen, Mark Anthony. "The controls on reservoir properties of Devonian sandstones in the Orcadian Basin, north east Scotland". Thesis, University of Reading, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239529.
Pełny tekst źródłaLongley, Andrew J. "Differential compaction and its effects : the Upper Permian Capitan Reef Complex, New Mexico and West Texas". Thesis, University of East Anglia, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.338248.
Pełny tekst źródłaSeger, Mark John. "The sedimentary evolution of the Gulf of Corinth Basin, central Greece". Thesis, Cardiff University, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.263294.
Pełny tekst źródłaIsles, Phillip James. "Diagenetic histories of Late Jurassic sediments in the central North sea". Thesis, University of Reading, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.308059.
Pełny tekst źródłaSiegbert, Otto. "The erosion of saltmarshes along the Severn Estuary SW Britain". Thesis, University of Reading, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246028.
Pełny tekst źródłaElliott, Graham. "Holocene solifluction sediments : evaluating their potential as a proxy climatic indicator". Thesis, University of Reading, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363459.
Pełny tekst źródłaHiggs, Karen E. "A geochemical and diagenetic study of the Lower Greensand, Weald Basin". Thesis, University of Reading, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.358174.
Pełny tekst źródłaScott, Brenda Mary. "The morphodynamics of coarse clastic beaches, examples from north Donegal, Ireland". Thesis, University of Ulster, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.242068.
Pełny tekst źródłaPike, Jennifer. "High resolution palaeoceanography and palaeoclimatology from Late Pleistocene and Holocene laminated sediments, Gulf of California". Thesis, University of Southampton, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.243123.
Pełny tekst źródłaTomlinson, Bruce Nicholas. "Erosion studies of mixed sand beds under the combined action of waves and currents". Thesis, University of Southampton, 1993. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239502.
Pełny tekst źródłaArtzani, Nasser. "Facies and diagenesis at the Triassic-Jurassic boundary in SW Britain". Thesis, University of Reading, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363835.
Pełny tekst źródłaSmith, Stanley Jarrell II. "Fine Sediment Dynamics in Dredge Plumes". W&M ScholarWorks, 2011. https://scholarworks.wm.edu/etd/1539616859.
Pełny tekst źródłaWarwick, Gail L. "The geomorphology and sedimentology of terminal fluvial systems". Thesis, University of Aberdeen, 2006. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.487421.
Pełny tekst źródłaMurton, Julian Baird. "Thermokarst sedimentology of the Tuktoyaktuk Coastlands, Northwest Territories". Thesis, University of Ottawa (Canada), 1993. http://hdl.handle.net/10393/6734.
Pełny tekst źródłaGingras, M. "Applications and approaches in ichnology, neoichnology, and sedimentology". Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape9/PQDD_0033/NQ46840.pdf.
Pełny tekst źródłaVan, Stempvoort Dale. "Chazy group carbonate sedimentology and diagenesis : southern Quebec". Thesis, McGill University, 1985. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=63375.
Pełny tekst źródłaPaterson, Richard James. "Carbonate diagenesis and sedimentology in an icehouse world". Thesis, University of Bristol, 2007. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.492466.
Pełny tekst źródłaMcInally, Alan T. "The reservoir sedimentology of ephemeral fluvial distributary systems". Thesis, Royal Holloway, University of London, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.287122.
Pełny tekst źródłaGlendinning, Neil Robert William. "Sedimentology of Proterozoic, Moine rocks of west Scotland". Thesis, Royal Holloway, University of London, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246211.
Pełny tekst źródłaHart, Stephen Francis. "Palaeoceanography and sedimentology of a mid-Cretaceous Greensand". Thesis, University of Oxford, 1991. http://ora.ox.ac.uk/objects/uuid:ac7da904-aad1-4525-8d11-9c520fc131d3.
Pełny tekst źródłaMedhi, Ellora. "The sedimentology and diagenesis of deep-water carbonates". Thesis, University of Newcastle Upon Tyne, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.238870.
Pełny tekst źródłaPirrie, D. "Sedimentology of the Marambio Group, Larsen Basin, Antarctica". Thesis, Open University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.327776.
Pełny tekst źródłaMoncrieff, A. C. M. "The Vendian stratigraphy and sedimentology of East Greenland". Thesis, University of Cambridge, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.330127.
Pełny tekst źródłaSansom, Pamela Jane. "Sedimentology of the Navajo Sandstone, southern Utah, USA". Thesis, University of Oxford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.670285.
Pełny tekst źródłaAbbots, Frances Vivien. "Sedimentology of Jurassic syn-rift resedimented carbonate sandbodies". Thesis, University of Bristol, 1989. http://hdl.handle.net/1983/08bc3c73-7880-4cfd-afc1-0af2d9e82e18.
Pełny tekst źródłaBristow, C. S. "Sedimentology of large braided rivers ancient and modern". Thesis, University of Leeds, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.380295.
Pełny tekst źródłaBeaumont, Hazel. "Cretaceous sedimentology of the Barmer Basin, Rajasthan, India". Thesis, Keele University, 2017. http://eprints.keele.ac.uk/3530/.
Pełny tekst źródłaMockford, Thomas. "Sources, drivers and sedimentology of Icelandic dust events". Thesis, Loughborough University, 2017. https://dspace.lboro.ac.uk/2134/33344.
Pełny tekst źródłaJunior, Paulo Ponce Arroio. "Avaliação da produção e transporte de sedimentos na bacia hidrográfica do Rio Itaqueri, municípios de Itirapina e Brotas - SP". Universidade de São Paulo, 2013. http://www.teses.usp.br/teses/disponiveis/18/18139/tde-02052013-083541/.
Pełny tekst źródłaThe soil erosion and the sediment yield are considered one of the biggest present environmental problems, a worldwide issue that inflicts environmental, economic and social damages. Many researches have efforts to understand the variables and constraints of these phenomenon, which have been understood through the multidisciplinarity of different areas of knowledge. In this context, this study attempts to obtain a diagnosis of sediment yield and its transport in Itaqueri River basin, in which is inserted the Lobo-Broa Reservoir. The hydrosedimentological model SWAT was used to estimate the sediment yield in the basin, as well was performed the monitoring of water quality, the quantifying of suspended-sediment discharge and the determination of bed material particle size distributions in streams. Through simulation, it was observed that occur in the basin different hydrosedimentological behaviors, where the average annual production of sediments is 18 t/ha, and its null in some places. It was observed that Itaqueri River contributed 65% of total average annual sediment reaching the reservoir, and this river also has the highest values of suspended-sediment discharge. The upper part of the basin was shown as an area of major input of sediment in drainage network, influencing the water quality in these sub-catchments, while middle course and low course of the river revealed the predominance of depositional processes. Water quality parameters and characterization of river bed sediment supplemented the results obtained by SWAT model, supporting a better understanding of hydrosedimentological processes.
Estigoni, Marcus Vinícius. "Influência da quantidade e disposição de dados na modelação de terrenos aplicada a batimetria de reservatórios. Estudos de caso: UHE Três Irmãos - SP e UHE Chavantes - SP". Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/18/18139/tde-29032012-111131/.
Pełny tekst źródłaWater reservoirs are built with the main purpose of guaranteeing water supply, however, their volume always decreases due the sedimentation processes. Bathymetric surveys can be deployed to assess the current volumetric capacity of a given reservoir and to estimate and quantify the sedimentation process. Although Bathymetric surveys are considered to be a key factor when analyzing and assessing properties of a given reservoir, a standard method for its deployment is yet to be defined. Authors and research groups presents different methods about the sampling rate as well as the choice of adequate spots for data collection. The overall goal of this research was to identify and analyze the different methods deployed in previous published literature analyzing the accuracy of the volume data provided by these different methods. Três Irmãos reservoir (São Paulo) was used as a case study where methods were compared. It was pointed out that the DEMs obtained were unable to accurately represent narrower reservoirs areas (tributaries) and the thalweg. Therefore was proposed a new method for determining the distance among survey sections as well as a routine for DEM generation takes into account the thalweg characteristics. Results revealed that the data pulled out was able to represent with accuracy the tributary areas (maximum difference was 5.01%). In addition, a reduced data collection time was observed (60%) when compared against the most accurate method found in published literature. The proposed technique for DEM generation indicated approximately 30% of quality improvement in the data calculated for the reservoir volume. The developed method was applied on a bathymetric survey conducted on the Chavantes reservoir (São Paulo). The loss of reservoir capacity assessed was 3.19%. According to results, a bathymetric survey which does not deploy the new method proposed would underestimate the reservoir\'s volume by 1.61% and overestimate the sedimentation process.
Ramos, Cléo Lindsey Machado. "A geodiversidade e a geoconservação nas Ilhas das Pombas e da Ponta Escura, Rio Grande do Sul". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/116734.
Pełny tekst źródłaThe geodiversity, combined with geoconservation, is a relatively new issue that is rarely explored by the academic community in Brazil. But in recent years, there was the need for preservation strategies of geodiversity understood as the abiotic environment, consisting of rock compositions and relief resulting from geological and geomorphological phenomena that differentiate lithology and minerals lead to the genesis of diverse landscapes and great diversity of environments that favour the development of different forms of life on Earth. In order to preserve the great ecological relevance environments like the island, a survey of the geodiversity of the Pombas and Ponta Escura islands, in southern Brazil, was developed to quantify their intrinsic value, their potential use and need for protection for geoconservation. The methodological procedures included a preliminary study of the area from satellite images, a field work for sample collecting, laboratory testing, production of cartographic material and analysis of the results. The islands have different genesis, one of them sedimentary (Ponta Escura) and the other rocky (Pombas). Particle size and morphometric characteristics of its sediments also differ one from another, where the Pombas features larger particle sizes ranging in very thick sand granule sizes, and immature grains, while on the island of Ponta Escura there was a greater rounding of grains and grain size with a high percentage of medium sand. The mineralogy, the Ponta Escura island stands out for its high amount of heavy minerals, especially tourmaline. Entisols predominate in both islands, with distinct suborders of Lithic (Leptosols/WRB-FAO) and Fluvents (Fluvisols/WRB-FAO) on the island of Pombas to Quartzipsamments (Arenosols/WRB-FAO) in Ponta Escura. The vegetation, whose floristic lacks scientific description, has a vegetation type characterized by diverse strata – interspersed with high size cacti – from a lower herbaceous to the canopy, sometimes highlighting tallest trees. The presence of individuals of some exotic species of flora witness to past anthropogenic interference with the original vegetation in both islands, most notably in Ponta Escura. Finally, adopting the methodology developed by Brilha (2005), we proceeded with the quantification to geoconservation purposes, which showed relatively high value in proportion to the islands size and to their belonging to an integral protection area. It is proposed an extension of the study area, including other islands that make up the lake Guaiba, relating the knowledge of geodiversity and biodiversity as strategies for geoconservation and management of human presence, because the unregulated human action can directly impact environments that may be sensitive and dynamic as on the islands of this study.