Dissertations / Theses on the topic 'Geological domains'
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Tian, Liang. "CO2 storage in deep saline aquifers : Models for geological heterogeneity and large domains." Doctoral thesis, Uppsala universitet, Luft-, vatten och landskapslära, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-279382.
Full textWennerbom, Alan John. "Charles Lyell and Gideon Mantell, 1821-1852: Their Quest for Elite Status in English Geology. Supplementary Volume: The Correspondence between Charles Lyell and his family and Gideon Algernon Mantell: 1821-1852." Thesis, The University of Sydney, 1999. http://hdl.handle.net/2123/380.
Full textWennerbom, Alan John. "Charles Lyell and Gideon Mantell, 1821-1852: Their Quest for Elite Status in English Geology. Supplementary Volume: The Correspondence between Charles Lyell and his family and Gideon Algernon Mantell: 1821-1852." University of Sydney, History and Philosophy of Science, 1999. http://hdl.handle.net/2123/380.
Full textMerino, Perez Irene. "Geophysical constraints on the nature of geological domains of continental rifted margins: examples from the West Iberia margin and Ligurian Basin." Doctoral thesis, Universitat de Barcelona, 2021. http://hdl.handle.net/10803/673631.
Full textEn esta tesis doctoral, se ha realizado un estudio geofísico y geológico de dos ejemplos clásicos de márgenes continentales: el margen de la Cuenca de Liguria y el margen de la Llanura Abisal del Tajo, ubicada en el margen Oeste de Iberia. A pesar de los diversos estudios previos de estas regiones, existe un debate abierto tanto sobre su estructura cortical como sobre los procesos que operaban durante su formación. Este trabajo de tesis ha tenido como objetivos: 1) determinar la naturaleza de las rocas que forman los principales dominios geológicos de ambos márgenes, 2) definir la estructura tectónica del basamento y 3) discutir la cinemática y la interacción de mecanismos tectónicos y magmáticos involucrados en la formación de los márgenes. Para conseguir estos objetivos, se han analizado e integrado diversos datos geofísicos. Los datos principales son de sísmica de reflexión de “streamer” multicanal y de sísmica de refracción y refracción de gran ángulo marinos. También se han integrado datos batimétricos y gravimétricos. La parte metodológica más novedosa de esta tesis es la utilización de los tiempos de trayecto de fases sísmicas de datos de streamer y gran ángulo en una tomografía conjunta. Esta metodología permite determinar con más precisión que otros métodos las velocidades de las ondas sísmicas (Vp) a través del basamento a lo largo de los perfiles. El modelo resultante permite establecer la naturaleza petrológica con menos incertidumbre que los métodos más comúnmente usados. El análisis, procesamiento, modelado e interpretación de estos conjuntos de datos permite una interpretación novedosa de los aspectos relacionados con la estructura y naturaleza de la corteza, así como la discusión de nuevas propuestas para los procesos tectónicos que llevaron a la configuración actual de cada uno de los ejemplos de márgenes continentales. La interpretación desarrollada difiere en gran medida de modelos previos en cuanto a la formación de ambos sistemas de rifting. Por ello, proponemos que su integración ofrece la oportunidad de revisar modelos conceptuales existentes en la literatura. En particular, los resultados muestran que la respuesta de la litosfera continental a los procesos de extensión puede ser más compleja de lo que se suponía hasta ahora.
Skog, Emma. "Geological factors affecting the channel type of Bjur River in Västerbotten County : A study concerning the connection between surficial geology, landforms, slope and different hydrological process domains in a stream catchment above the highest shoreline." Thesis, Umeå universitet, Institutionen för ekologi, miljö och geovetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-160914.
Full textLeduc, Amelie. "Seismic analysis of linked geological processes in the transitional domain of gravity detachment systems : deepwater western Niger Delta." Thesis, Durham University, 2013. http://etheses.dur.ac.uk/9443/.
Full textFerley, Simon Julius John. "An examination of the effects of geological and glacigenic controls on the engineering properties of till using a domain based approach." Thesis, University of Birmingham, 2014. http://etheses.bham.ac.uk//id/eprint/5187/.
Full textLau, Ian Christopher. "Regolith-landform and mineralogical mapping of the White Dam Prospect, eastern Olary Domain, South Australia, using integrated remote sensing and spectral techniques." Title page, abstract and table of contents only, 2004. http://hdl.handle.net/2440/37972.
Full textThesis (Ph.D.)--School of Earth & Environmental Sciences, 2004.
Pitombeira, JoÃo Paulo AraÃjo. "Geochemistry and geochronology of metamafic and metaultramafic rocks from Novo Oriente group-ce, sw cearà central domain, Borborema Province." Universidade Federal do CearÃ, 2014. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=12863.
Full textIn theNovo Orienteregion, located approximately 400 km from Fortaleza-CE, metamaficand metaultramafic rocks occur in different contexts in the southwestern portion of the Cearà Central Domain ofBorborema Province. The metamafic rocks occurintercaleted with metapelitic and metapsamitic rocks in the form of lenses and tabular layers, with varied thickness, from centimeter to a few tens of meters, consistent with the N-S foliation and metamorphosed under greenschistand amphibolitefacies conditions. The geochemical data indicate a tholeiitic basaltic composition with signature of type MORB basalts, seafloor basalts, calc-alkaline and intra-plate basalts. The main occurrence of ultramafic rocks is associated with a thrust sheetpreserved on a topographic high known as Pereiras Hill. In that location, metaultramafic rocks intensely tectonized, serpentinized, steatizated and silicified, comprising serpentinites (sheared or isotropic), chloritites, actinolitites, tremolitites, talc-chlorite schists,serpentine-talc schists, talc-rich siliceous rocks and listwÃnitesoutcrop in situ. Petrographic studies of thin/polished sections underconventional optical microscope and also scanning electron microscope - SEM, confirmed the presenceof several minerals of economic interest, such as Cr-magnetite, ferrichromite and Cr-spinel associatedwith the rocks of the metaultramaficsequence. Geochemical data indicate that the serpentinites cancorrespond to rocks resulting from the alteration of Alpine-type ultramafites (peridotites and dunites)depleted in REE, similar to the pattern presented by subduction-zone serpentinitos generated fromexhumed sub-continental peridotites and hydrated during ocean-continental transition (OCT) rifting. Sm-Nd isotopic analyzes of the two group of rocks show a juvenile paleoproterozoic derivation for most samples with TDMNd age ranging from 2.10 to 2.46 Ga,ɛNd,2.1 between 0.40 and +3 30, and mixing with older sources represented by archeanTDM ages ranging from 2.63 to 3.29 Ga and ɛNd,2.1 slightly negative (-0.15 to -0.22). The data suggest that the metamafic and metaultramafic rocks could represent, respectively, the mafic magmatism during the development of a magma-poor passive margin and part of a sub-continental lithospheric mantle exhumed in an ocean-continent transition (OCT.
A regiÃo de Novo Oriente, localizada a aproximadamente 400 km de Fortaleza-CE, à conhecida porocorrÃncias de rochas metamÃficas e metaultramÃficas asquais afloram em diferentes contextos na porÃÃo sudoeste do DomÃnio Cearà Central da ProvÃnciaBorborema. As rochas metamÃficas afloram intercaladas comrochas metapelÃticas e metapsamÃticas sob a forma de lentes e estratos tabulares concordantes,com espessura variada, desde centimÃtrica a algumas dezenas de metros, concordantes com a foliaÃÃo N-S e metamorfisadas sob condiÃÃes do facies xisto verde a anfibolito. Os dados geoquÃmicos apontam para uma composiÃÃo basÃltica toleÃtica com assinatura geoquÃmica debasaltos tipo MORB, de fundo oceÃnico, basaltos cÃlcio-alcalinos eintra-placa.A principal ocorrÃncia de carÃter ultramÃfico està associada a uma lasca tectÃnicapreservada em um alto topogrÃfico conhecido como Morro dos Pereiras. Na referida localidade,rochas metaultramÃficas intensamente tectonizadas, serpentinizadas, esteatizadas e silicificadas, quecompreendem serpentinito (cisalhados ou isotrÃpicos), actinolititos, tremolititos, clorititos, talco-clorita xistos, serpentina-talcoxistos (asbestos), rochas talco-silicosas e listwanitos, afloram in situ. Estudos petrogrÃficos de seÃÃes delgadas/polidas, em microscÃpio Ãtico convencional e tambÃm em microscÃpio de varredura eletrÃnica â MEV, confirmaram a presenÃa de diversos minerais de interesse econÃmico tais como cristais de Cr-magnetita, ferricromita e Cr-espinÃlio associados Ãs rochas da sequÃncia metaultramÃfica. Os dados geoquÃmicos indicam que os serpentinito podem corresponder a rochas oriundas da alteraÃÃo de ultramafitos do tipo alpino (peridotitos e dunitos), empobrecidas em ETR, similar ao padrÃo apresentando pelos serpentinitos de zona de subducÃÃo oriundos de peridotitossub-continentais exumados e hidratados durante rifteamento em OCT (ocean-continental transition). AnÃlises isotÃpicas Sm-Nd dos dois grupos de rochas apontam para uma derivaÃÃo juvenil paleoproterozÃica com idades TDM variando de 2,10 a 2,46 Ga, ɛNd,2,1 entre +0,40 e +3,30, e mistura com fontes mais antigas representada pelas amostras com idades TDM arqueanas que variam de 2,63 a 3,29 Ga e ɛNd,2,1 levemente negativo (-0,15 a -0,22). Os dados obtidos sugerem que as rochas metamÃficas e metaultramÃficas poderiam corresponder, respectivamente,o magmatismo maficodurante o desenvolvimento de uma margem passiva pobre em magmase a parte de um manto sub-litosfÃrico continentalexumado em uma zona de transiÃÃo oceano-continente(OCT).
Mello, Marília Terra de. "Integração de dados e processos disponíveis em portais web baseada em ontologias de domínio." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2008. http://hdl.handle.net/10183/15823.
Full textIntegration and exchange of information across the Internet is a universally recognized need, in a wide variety of domains. Nowadays, the Web is the main source of information, providing many ways to access this content. However, making this information available to the user in an integrated way is still a challenge. New promising application fields such as Semantic Web Services can improve the integration process of data and processes available in Web portals. The goal of the present research is to accomplish the integration of the different functionalities offered by portals available in the Web, making use of domain ontologies through Semantic Web Services. In order to achieve the proposed goal, a search and integration system, named W-KIS, was designed and developed. The system provides the user with a unified and transparent view of the whole information available in a number of Web portals, related to a specific application domain. Two application domains were explored in this work through two case studies: the Biomedicine and the Geology, each one providing its own domain ontology. Semantic Web Services were designed to encapsulate Web portals in both domains, allowing the system to accomplish the integration in each domain, separately. The application proposed in this project was validated through the evaluation of its behavior in both domains, besides other tests with final users and comparisons with other approaches for integration in the Web, and traditional search engines. Making use of Semantic Web Services, W-KIS is able to find and execute the services in an automatic way, besides dealing with the semantic heterogeneity in the information sources by means of domain ontologies. This way, the system provides the user with information contextualized to its interest.
León, Arteaga Angélica M. de. "Spatial Objective Analysis of Oceanographic Variables. An Application to the Ebro Delta Shelf/Slope Domain (North- Western Mediterranean)." Doctoral thesis, Universitat Politècnica de Catalunya, 2002. http://hdl.handle.net/10803/6383.
Full textWe used CTD data from four oceanographic campaigns on the Ebro Delta region under different conditions: FANS I - autumn, FANS II - winter, FANS III - summer and MEGO 94, a previous winter campaign, showed atypical winter conditions, with open ocean dynamics that differed significantly from the shelf ones.
We find that the EOFs applied to hydrographic variables with the self campaign eigenvectors renders very good results (expressed as variance explained percentage), when a non-standardized analysis is used (in which the variability is assumed to be unevenly distributed in the water column, as occurs in the ocean). Good results are also obtained when the variability is assumed to be evenly distributed (standardized analysis). When the historic eigenvectors are used, together with the campaign data, a larger number of modes needs to be included. The results are very good for the summer-FANS III and winter-FANS II campaigns. On the other hand, some significantly large errors are obtained for EOF-standardized density with the autumn-FANS I and the winter-MEGO 94 campaings.
The projection of the EOFs results onto a 2.5 x 2.5 km 2D grid were carried out through a SC algorithm. Some unreliable distributions are obtained with the standardized density analysis, due to the differences of the open ocean and shelf distributions, which in turn lead to a very wide range of mode amplitudes. This lead us to test the interpolation of the estimated profiles instead of the amplitude values, improving the results in a significant manner.
The geostrophic circulation obtained with Csanady's method renders spurious along-transect values. While this method has been successfully used on other shallow regions, the abrupt shelf/slope topography of the Ebro Delta, together with the integration path, render it unreliable. The EOFs estimates with the self-campaign eigenvectors tend to approach well the dynamic height distributions of outer slope and open ocean, particularly the non-standardized analysis. The estimates on the shelf circulation seem to be reliable in two campaigns only. Since no current ADCP data is available in any of the campaigns, a quantitative evaluation is not possible. The use of historic eigenvectors does not contribute to a better estimate of the shelf circulation.
Reninger, Pierre-Alexandre. "Méthodologie d'analyse de levés électromagnétiques aéroportés en domaine temporel pour la caractérisation géologique et hydrogéologique." Phd thesis, Université d'Orléans, 2012. http://tel.archives-ouvertes.fr/tel-00802341.
Full textEscalas, Oliver Magdalena. "Anàlisi temps-freqüència de l’estat de polarització del senyal magnetotel·lúric = Polarisation analysis of the magnetotelluric signal in the time-frequency domain." Doctoral thesis, Universitat de Barcelona, 2015. http://hdl.handle.net/10803/336095.
Full textThe magnetotelluric (MT) signal is usually affected by electromagnetic anthropogenic noise (cultural noise). At present, its detection and removal is one of the challenges to improve the responses of the MT method. The MT signal does not generally have a specific polarisation state in the time-frequency (t-f) domain. However, some of its natural sources such as Pc3 geomagnetic pulsations or Schumann resonances have characteristic polarisation properties. In contrast, cultural noise is usually linearly polarised in a certain direction due to the fixed location of its sources in space. The major contribution of this thesis is the development, for the first time, of a method for polarisation analysis of the MT signal in the (t-f) domain. It is proposed as a tool to identify and characterise some of its natural sources and those of cultural noise. It provides the polarisation attributes of the MT signal in the (t-f) domain computed in terms of the wavelet transform, since both the MT signal and the cultural noise show time and frequency variations. The theoretical basis of the method has been established, and it has been implemented in a code named MTWAVELETS. Cultural noise created by power lines, electrified DC railways, wind turbines and industrial areas has been detected and characterised from the analysis of MT time series acquired at Hontomín (Spain) and Lamezia Terme (Italy). The analysis of MT time-series from Tramutola (Italy) points to Pc3 pulsations as one of the causes of the oscillation of the MT responses in the (t-f) domain at this site. Moreover, the first four modes of the Schumann resonances were detected and analysed from MT time-series acquired at Huidobro (Spain). The new tool developed in this thesis is a major contribution to the analysis of the MT signal since it allows detecting and characterising its sources, both natural and noisy. It has many applications: in the scope of improving the quality of the MT responses due to the identification of cultural noise and geomagnetic signals capable of altering them, and in the scope of the study of the ionosphere and the magnetosphere due to the characterisation of geomagnetic signals.
Nascimento, Rosemery da Silva. "Dominio Caninde, faixa sergipana, Nordeste do Brasil : um estudo geoquimico e isotopico de uma sequencia de rifte continental neoproterozoica." [s.n.], 2005. http://repositorio.unicamp.br/jspui/handle/REPOSIP/287299.
Full textTese (doutorado) - Universidade Estadual de Campinas, Instituto de Geociencias
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Resumo: A Faixa Sergipana está localizada na região nordeste do Brasil, entre o Maciço Pernambuco-Alagoas e o Cráton do São Francisco. Na literatura é interpretada como a continuação, na América do Sul, da Faixa Oubanguides, na África, com idade Neoproterózóica (Ciclo Brasiliano/Pan-Africano). O quadro lito-estrutural da região está individualizado em diversos domínios, dentre os quais destaca-se o Domínio Canindé na porção central dessa unidade geotectônica. O Domínio Canindé é constituído por rochas metavulcanossedimentares invadidas por uma suíte gabróica e granitos diversos (Boa Esperança, Lajedinho, Tipo Sítios Novos e Xingo). Sobre este domínio há controvérsia quanto ao provável contexto tectònico dessas rochas, com propostas que vão desde complexo ofiolítico, ambiente intra-continental a seqüência de arco intra-oceânico. Assim este trabalho visa a caracterização geoquímica e temporal do Domínio Canindé, usando técnicas, como o ICP-MS capaz de analisar elementos (Nb, Ta, Th, La,) com elevado poder de interpretação na definição de ambiência tectõoica. Somada as técnicas modernas de geocronologia ( U-Pb em grãos de zircão utilizando SHPJMP) em conjunto com métodos convencionais e integração dos resultados obtidos com as observações das relações de campo. As análises isotópicas Pb-Pb do Domínio Canindé revelaram isócrona de 963±20 Ma para mármores associado com anfibolitos e outros metassedimentos. Os resultados das análises Sm-Nd indicam para os metassedimentos da Unidade Novo Gosto dois conjuntos de idade modelo (Td_m) 1.5 e 1,14 Ga e o anfibolitos entre 1,3-0,8 Ga. Os anfibolitos da Unidade Gentileza apresentam Tdm com valores entre 1,2-0,8 Ga e quartzo-monzodiorito com textura rapakivi desta unidade apresenta Tdm em torno de 0,89 Ga. O sNa\t=o> para as unidades Novo Gosto e Gentileza são dominantemente negativos. Os resultados de análise de SHRIMP em metassedímento da Unidade Novo Gosto revelaram idades de áreas fontes distintas (977-718-679 Ma). A Unidade Gentileza apresenta idade U-Pb (SHRIMP) em torno de 688 = 15 Ma, Granito Lajedinho 634 ± 10 Ma e Suíte Gabróica Canindé em torno de 690 ± 16 Ma. O quartzo-monzodiorito com textura rapakivi da Unidade Gentileza apresenta idade de 684 ± 7,3 Ma (U-Pb em zircão por diluição isotópica). As áreas fontes mais antigas da Unidade Novo Gosto correspondem às rochas do Domínio Poço Redondo e Maciço Pernambuco-Alagoas, enquanto as mais jovens as rochas do próprio Domínio Canindé. As composições isotópicas de Nd e anomalias negativas de Nb e Ta das unidades Novo Gosto e Gentileza, associadas com granitos com caracteríticas químicas anorogênicas, além de diorito com textura rapakivi, sugerem um cenário geotectônico de rifle intra-continental para as rochas do Domínio Canindé, cuja a sedimentação perdurou até o ciclo Brasiliano.
Abstract: The Sergipana belt is located in the northeastern region of Brazil, between the Pernambuco-Alagoas massif and the São Francisco craton. The Sergipana belt has been interpreted as the South American counterpart of the African Neoproterozoic Oubanguides belt, both developed during the Brazilian/PanAfrican cycle. The litho-structural array of the Sergipana belt is composed of several domains, with the Canindé domain that is located in the central part of that geotectonic unity. The Canindé domain comprises of metavolcano-sedimentary rocks that are crosscut by a gabbroic suite and several granite bodies (eg. Boa Esperança, Lajedinho, Sítios Novos and Xingo granites). The tectonic context in which these rocks were formed is controversial. Previous models considered the area as an ophiolitc complex, an intracontinental environment, or alternatively as an island arc. In this work the Canindé domain is characterized in terms of stratigraphy, geochemistry and geochronology. Trace-element contents (eg. Nb, Ta, Th, La) were used in order to define the geotectonic environment. Geo chronologic data were obtained on zircon by U-Pb SHRIMP and other conventional techniques. Pb-Pb isotopic analyses revealed an isochron of 963 ± 20 Ma for marbles associated with amphibolites and metasedimentary rocks. Sm-Nd data of metasedimentary rocks (Novo Gosto unity) indicated model ages (Tdm) of 1.5 Ga and 1.14 Ga. Tdm amphibolites are comprised between 1.3 Ga and 0.8 Ga. Amphibolites from the Gentileza unity have (Tdm) situated in the interval 1.2 and 0.8 Ga. Quartz-mozodiorites displaying rapakivi texture from the Gentileza unity present Tdm ages of ca. 0.89 Ga. The eNd(t=o) values of Novo Gosto and Gentileza unities are dominantly negative. SHRIMP data of Novo Gosto unity indicated different ages for the source rocks (977 Ma, 718 Ma and 679 Ma). U-Pb SHRIMP zircon data of the Gentileza unity and the Lajedinho granite are respectively 688 ± 15 Ma and 634 ± 10 Ma. The Gabbroic Suite Canindé was dated at 690 ± 16 Ma and quatz-monzodiorite rapakivi from the Gentileza unity by U-Pb conventional technique (zircon) revealed age 684 ± 10 Ma. It is suggested that the oldest sources of the Novo Gosto metasediment correspond to rocks from the Poço Redondo domain and the Pernambuco-Alagoas massif, whereas the youngest ones are those from the Canindé domain. Nd isotopic compositions and the negative Nb and Ta anomalies observed in rocks from the Novo Gosto and Gentileza unities associated with the anorogenic character of the granites and with the presence of rapakivi-textured diorites permit to propose that the Canindé domain developed in an intra-continental rift whose sedimentary history lasted until the Braziliano cycle.
Doutorado
Metalogenese
Doutor em Ciências
Lima, Paulo Roberto Correia de. "Análise da geometria dos domínios geológicos de sub-superfície a partir de perfis de poços tubulares no município de Fortaleza - Ceará." reponame:Repositório Institucional da UFC, 2014. http://www.repositorio.ufc.br/handle/riufc/20033.
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The research seeking the geometric characterization of Fortaleza’s Sedimentary Geologic Domain was based on SIAGAS/CPRM (Mineral Resources Research Company) and GEOHIDRO (Geology Hydrogeology and Services) tubular wells records which combined reach the mark of 1166 tubular wells recorded until December 2012. The wells that had a geologic profile totaling 516 were analyzed according to their lithological characteristics technical-constructive aspects and hydrogeological parameters. After the bibliographic revision and the well’s reports gathering the data contained on that reports were organized in sheets maps tables graphics and figures. So then 274 lithological profiles of the 516 recorded were selected to elaborate the fourteen geologic profiles being seven on N-S direction and seven on W-E direction. These geological profiles allowed a better view of the sedimentary packages as well as the crystalline basement and its contour allowing a much more accurate interpretation about the way the sedimentary domain behaves compared to the top of the basement. From the profiles analysis was conclusive that the sedimentary package tends to increase its thickness when approaches the coast. It was observed that the sedimentary domain contains a Carbonate Formation located on the N/NE part of the area classified at first as a infra-Barreiras formation that becomes more thick when approaches the coast zone. It is worth mentioning that the sedimentary package has a more embracing geometry than that related on previous studies. The analysis of that profiles also revealed elevated parts of the basement (structural highs) and depocenters assimilated to horsts and grabens in N-S direction. Analyzing the top and base data of the 137 wells that contains the mantle of alteration from the basement it was possible to draw its contour and measure the average of its thickness that is something about seventeen meters. Among the structures we can highlight the lineaments located on the east part of NW-SE direction and in the center-south part of NE-SW direction. Secondly the faults of NE direction and the fractures of NE NW and W-E direction are observed in the W SW S center-south and SE parts of the area. Apparently the great drainage segments were affected by the lineaments faults and fractures. On the sedimentary hydrogeological domain the hydrogeological parameters presented the following values: from the data collected on 267 wells that had a profile the average of the Static Level presented was 8.4 meters and from 265 wells with a profile the average output presented was 416 m³/h. Now on the crystalline hydrogeological domain the average values was: from the data collected on 237 wells the average of the Static Level was 8.85 meters and from data collected on 236 wells the average output was 41 m³/h. Now the saturated thickness (here considered the sum of the filter columns) calculated from 378 wells presented an average of 24.4 meters with a standard deviation below 20% which attests a tolerable average dispersion.
A pesquisa visando a Caracterização Geométrica do Domínio Geológico Sedimentar de Fortaleza teve como base o cadastro de poços tubulares SIAGAS/CPRM (Companhia de Pesquisa e Recursos Minerais) e da empresa GEOHIDRO (Geologia Hidrogeologia e Serviços Ltda.) que somados totalizam 1166 poços tubulares cadastrados até dezembro de 2012. Os poços que apresentam perfil litológico em um total de 516 foram analisados segundo suas características litológicas aspectos técnico-construtivos e parâmetros hidrogeológicos. Após a revisão bibliográfica e a coleta dos relatórios de poços os dados contidos nestes relatórios foram organizados em planilhas mapas tabelas gráficos e figuras. Foram então selecionados 274 perfis litológicos dos 516 perfis cadastrados para a elaboração de 14 perfis geológicos sendo 7 perfis geológicos na direção N-S e 7 perfis geológicos na direção W-E. Estes perfis permitiram uma melhor visualização dos pacotes sedimentares assim como do embasamento cristalino e de seu contorno possibilitando uma interpretação mais precisa da forma como se comporta o domínio sedimentar em relação ao topo do embasamento cristalino. Da análise dos perfis geológicos concluiu-se que o pacote sedimentar tende a aumentar sua espessura na medida em que se aproxima do litoral. Foi observado que o domínio sedimentar contém uma Formação Calcária localizada na porção N/NE da área classificada a prori como Infra-Barreiras que se torna mais espessa à medida que se aproxima da zona litorânea. Vale ressaltar que o pacote sedimentar tem uma geometria mais abrangente do que a relatada em trabalhos anteriores. A análise desses perfis revelou ainda altos estruturais e depocentros assemelhados a horst e graben alinhados na direção N-S. Analisando os dados de topo e base dos 137 poços que contém o manto alterado foi possível desenhar o seu contorno e medir sua espessura média que é de aproximadamente 17 metros. Dentre as estruturas podem ser destacados os lineamentos situados na porção oeste de direção NW-SE e na porção centro-sul de direção NE-SW. Secundariamente a falha de sentido NEe as fraturas de sentido NE NW e W-E são observadas nas porções W SW S centro-sul e SE da área. Aparentemente os grandes seguimentos da drenagem foram influenciados pelos lineamentos falhas e fraturas do terreno. No domínio hidrogeológico sedimentar os parâmetros hidrogeológicos apresentaram os valores que se seguem: a partir de dados colhidos em 267 poços com perfil a média do Nível Estático (NE) apresentada foi de 84 metros e a partir de 265 poços com perfil a Vazão média (Q média) apresentada foi de 416 m³/h. Já no domínio hidrogeológico cristalino os parâmetros hidrogeológicos apresentaram os seguintes valores: a partir de dados colhidos em 237 poços a média do Nível Estático (NE) apresentada foi de 885 metros e a partir de dados colhidos em 236 poços a Vazão média (Q média) apresentada foi de 41 m³/h. Já a espessura saturada (aqui considerada o somatório da coluna de filtros) calculada a partir dos dados de 378 poços apresentou uma média de 244 metros com desvio padrão abaixo de 20% o que atesta uma dispersão média tolerável.
Roque, Marcio William. "Variabilidade espacial de atributos fisico-hidricos do solo cultivado com feijão irrigado sumetido a diferentes sistemas de preparo." [s.n.], 2007. http://repositorio.unicamp.br/jspui/handle/REPOSIP/257017.
Full textTese (doutorado) - Universidade Estadual de Campinas, Faculdade de Engenharia Agricola
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Resumo: Diante da importância da necessidade de água para irrigação, torna-se imprescindível a conscientização do produtor rural com relação ao seu manejo racional, pois a irrigação tem sido apontada, ao longo das últimas décadas, como a grande consumidora de água. Diversos trabalhos têm mostrado que a prática do manejo racional da irrigação associada ao sistema plantio direto leva o agricultor a produzir igual ou até mais, em relação ao plantio convencional, com um menor consumo de água, evitando-se assim, o desperdício desse recurso, além de contribuir para o desenvolvimento de uma agricultura sustentável. Entretanto, dependendo do tempo, das condições de implantação e manejo do plantio direto, em muitas lavouras verificou-se um aumento do estado de compactação, com aumento de densidade do solo e da resistência mecânica à penetração, causando perda na produção. Diante do exposto, o objetivo deste trabalho foi avaliar a dependência espacial dos atributos físico-hídricos do solo e da produção, verificando-se as inter-relações destes com a produção de grãos do feijoeiro irrigado sob sistema plantio direto e convencional, e também verificar o uso da técnica Reflectometria no Domínio do Tempo (TDR) no monitoramento da umidade do solo nos mesmos sistemas. Para isso foi semeado o feijão como cultura de inverno durante as safras de 2005 e 2006 em quatro parcelas experimentais conduzidas sob plantio direto e convencional, irrigado e não irrigado. Em cada parcela experimental de dimensões de 20 x 30m, foram definidas malhas de amostragem de 3 x 3m, totalizando 60 pontos amostrais por parcela. O solo das parcelas pertence à classe Latossolos Vermelhos Distroférricos típicos. Nos pontos amostrais foram inseridas sondas de TDR para o monitoramento da umidade do solo, e determinada a condutividade hidráulica saturada, a resistência do solo à penetração e retirada de amostras para a determinação da densidade do solo. Utilizando-se de um nível óptico foi determinada a cota em metros de cada ponto amostral nas parcelas estudadas. A análise da dependência espacial foi avaliada por meio da geoestatística, e os parâmetros dos semivariogramas utilizados para construir mapas de isolinhas utilizando-se do interpolador de krigagem pontual disponível no programa Surfer 8.0. Os principais resultados obtidos indicaram que a calibração da TDR proposta por Topp et al. (1980) como universal, não é adequada para o solo estudado. A técnica da TDR foi eficiente no monitoramento da umidade do solo ao longo do ciclo da cultura do feijoeiro e pode ser empregada no manejo da irrigação, desde que se faça a previa calibração do equipamento para o solo estudado. Os valores de resistência do solo à penetração (RP), para os dois sistemas de manejo do solo aumentaram de uma safra para outra, sendo que no plantio direto este aumento foi superior, ultrapassando os valores de RP do plantio convencional na safra de 2006. Entretanto os valores obtidos não interferiram na produtividade do feijoeiro nos dois sistemas de preparo do solo. Os valores da condutividade hidráulica saturada, para os dois sistemas de manejo do solo aumentaram de uma safra para outra, sendo que na safra de 2006, os valores de condutividade hidráulica saturada para o sistema plantio direto foram superiores ao convencional. Com relação à densidade do solo, na safra de 2005, o plantio convencional obteve menor valor médio, e, na safra 2006, os valores médios da densidade do solo foram os mesmos para os dois sistemas de manejo. Todos os atributos físico-hídricos e a produtividade de grãos apresentaram dependência espacial nos dois sistemas de manejo do solo para as duas safras agrícolas. Com relação às inter-relações entre os atributos estudados e a produção, todas as regressões lineares simples não mostraram correlação com a produção. A regressão linear simples entre os mapas dos atributos estudados e a produção, mostrou-se significativas, com baixos valores de coeficiente de determinação. O melhor resultado obtido foi com a relação densidade do solo e a produção no sistema plantio convencional na safra 2005, com coeficiente de determinação de 43,39 %, ou seja, dentro das variáveis estudadas foi a que melhor explicou a variação da produção. Na busca de um modelo que explicasse a variação da produção em função dos atributos físico-hídricos do solo e da cota do relevo, utilizou-se da regressão linear múltipla pelo método stepwise obtendo-se modelos significativos estatisticamente que explicaram a variação da produção com coeficientes de determinação entre 27,34 % e 71,70 %
Abstract: Since last decades irrigation practices are recognized as major water consumers, requiring specific agricultural producers education and awareness on water use and supply. Recent research reports indicate significant water economy, crop yielding as well as contribution to sustainable agricultural development, if direct seedling, when compared with conventional practices, is associated to adequate irrigation management. However, depending on weather conditions as well as on the direct seedling implementation conditions, many crop plantations showed increasing soil bulk density and compaction with increasing soil mechanical resistance to penetration, causing crop production reduction. Based on what it has been exposed before, the objective of this research is to evaluate crop yielding and soil physical-hydric attributes spatial dependence as related to irrigated bean grain production associated to no-tillage and to conventional tillage systems. The Time Domain Reflectometry (TDR) efficiency in the soil moisture monitoring in the same crop systems was also evaluated. Four experimental plots with dimensions of 20m x 30m were seeded with beans in the years and 2005 and 2006 and carried under irrigated and non irrigated conventional as well as no-tillage systems. Each plot was screened with 3m x 3m sampling grids, completing a total of 60 sampling points in each plot. Plot soil was classified as Typical Distroferric Red Latossol. TDR probes were introduced into the soil on each plot to monitor moisture content, also being measured saturated hydraulic conductivity, resistance to penetration and sampling for soil bulk density determination. Elevation of each sampling point was determined by means of an optical instrument and expressed in meters. Spatial dependence analysis was evaluated through geostatistic techniques and the semivariograms parameters were employed to generate isoline maps trough the punctual kriging interpolator of the Surfer 8.0 program. Obtained results indicated TDR calibration as proposed by Topp et al. (1980), considered of universal feature, is not adequate to the soil under study. TDR technique showed to be efficient in monitoring soil moisture content throughout bean plant cycle, being applicable in the irrigation process, since a previous equipment calibration in accordance with soil type under study. Soil resistance to penetration associated to both management systems showed increased value from one harvest to the next one, being greater for no-tillage system, surpassing the RP value associated to the conventional tillage for the year of 2006. However, obtained values do not interfere in the bean plant productivity for both employed growing system. Values saturated hydraulic conductivity had increased from one harvest to the next, observing that for the year of 2006 no-tillage system showed larger values than the conventional one. Conventional tillage showed lower soil bulk density average values for the year of 2005, however these values became the same for both methods in the year of 2006 harvest. All physical-hydric attributes as well as grain productivity presented spatial dependence for both soil cultivation techniques for both harvesting periods. All of simple linear regressions showed no correlation between attributes and bean production. However, simple linear regressions showed to be significant for attribute maps and production, presenting low determination coefficient values. The best observed result was identified to be the soil density related to production for the conventional crop management, showing the determination coefficient of 43,39 %, i.e., which is considered the best explaining production variation variable. In looking for a model explaining production variation as a function of soil physical-hydric attributes and relief elevation by means of multiple linear regression by the stepwise method, statistically significant models which explains production variation between 27,34 % to 71,70 %
Doutorado
Agua e Solo
Doutor em Engenharia Agrícola
Sousa, HerdivÃnia Pires de. "CaracterizaÃÃo das unidades mÃfica-ultramÃficas e potencial metalogenÃtico da sequÃncia metavulcanossedimentar Serra das Pipocas (CearÃ): um provÃvel Greenstone Belts." Universidade Federal do CearÃ, 2016. http://www.teses.ufc.br/tde_busca/arquivo.php?codArquivo=17285.
Full textThe Rhyacian Serra das Pipocas Greenstone Belt, is part of Archean/Proterozoic terrene of Cearà Central Domain, in the Setentrional portion of Borborema Province. It is located in Southwestern CearÃ, between the municipalities of Boa Viagem, IndependÃncia, Tauà and Pedra Branca. Geological mapping techniques, thin and polished sections petrography, mineral chemistry, lithogeochemistry, and geochronology have been useful in the distinction of the first Greenstone Belt sequence in CearÃ. The metavolcanic-sedimentary sequence is composed of metasedimentary rocks, marly psammite-pelite, containing alternation of mafic-ultramafic volcanic floods, tholeiitic and komatiitic, respectively, and meta-acidic rocks. The komatiitic meta-ultramafic floods are composed of chlorite-anthophyllite-actinolite-tremolite schist displaying acicular texture, or not, occuring discontinuously near the bottom of the sequence. The tholeiitic metamafic rocks are mainly represented by garnet amphibolites, which continuously extend 30km in length by 500m â 1km wide. Basic and acidic metatuffs, metacherts, and banded iron formation are alternated with amphibolites, which sometimes are deeply hydrotermalized. Metasedimentary rocks are mainly terrigenous, containing biotite, kyanite; however, occasional centimetric alternation of calc-silicatic rocks are observed. These lithotypes are cutted off by mafic-ultramafic intrusions, metagranodiorites and metabasic dykes. The lithological association has been developed in a extensional enviroment, probably a back-arc basin, where the komatiitic rocks Mg-Bearing schists display a transition from Munro-type to Barbeton-type, while the tholeiitic metabasalts (amphibolites) are iron-magnesium-rich. Regarding the structural geology, the area is caracterized by penetrative polyphasic strain, occurred during Brasiliano, with tight, isoclinal and recumbent folds, in addition to thrust faults and shear zones. The thrust faults are best recognized, especially, in the contact between the metavolcanic-sedimentary sequence and granite-gneiss-migmatite of Cruzeta Complex; also, between the mafic-ultramafic subunits. The metamorphic grade of the lithological association varies from high greenschist facies to high amphibolite facies, contrasting with Cruzeta Complex units, which are frequently migmatized. Besides, during the Brasiliano orogenesis, leucocratic granites have been intruded along the border zones of the oldest granites (2181,4Â4.4), near the Queimadas thrust fault, there are deeply hydrotemalized rocks, displaying silicification, potassification, chloritization, and carbonation, sulphidation is also present, and they may contain some mineralisation such as copper-gold Volcanic-hosted Massive Sulfide or auriferous lodes, because this association occurs near the silicified zones and also in shear zones.
O Greenstone Belt Serra das Pipocas, de idade riaciana, està inserido no NÃcleo Arqueano/Paleoproterozoico do DomÃnio Cearà Central, na porÃÃo Setentrional da ProvÃncia Borborema. Encontra-se na porÃÃo sudoeste do Estado do CearÃ, entre os municÃpios de Boa Viagem, IndependÃncia Tauà e Pedra Branca. TÃcnicas de mapeamento geolÃgico, anÃlise petrogrÃfica, atravÃs de estudos de seÃÃes delgadas e polidas, quÃmica mineral, litogeoquÃmica e geocronologia auxiliaram para a distinÃÃo desta primeira sequÃncia do tipo Greenstone Belt no CearÃ. A sequÃncia metavulcanossedimentar à composta por rochas metassedimentares psamo-pelito-margosos, contendo intercalaÃÃes de derrames vulcÃnicos metamÃfico-ultramÃficos de natureza toleÃtica e komatiÃtica, respectivamente, e meta-Ãcidas. Os derrames metaultramÃficos komatiÃticos sÃo constituÃdos por clorita-antofilita-actinolita/tremolita xisto, com texturas aciculares ou nÃo, ocorrendo de maneira descontÃnua prÃximo à base da sequÃncia. As rochas metamÃficas de natureza toleÃticas sÃo representadas principalmente por anfibolitos granadÃferos, que se estendem, de maneira descontÃnua, por uma faixa com comprimento da ordem de 30km e largura entre 500m e 1km. Metatufos bÃsicos a Ãcidos, metacherts e formaÃÃes ferrÃferas bandadas ocorrem intercaladas a estes anfibolitos, que se encontram por vezes, fortemente hidrotermalizados. As rochas metassedimentares sÃo principalmente de natureza terrÃgena, contendo biotita, cianita, mas podem apresentar ocasionais intercalaÃÃes centimÃtricas de calcissilicÃticas. Esses litotipos sÃo recortados por intrusÃes metamÃfica-ultramÃficas, metagranodioritos e dique metabÃsico. Toda a associaÃÃo litolÃgica desenvolveu-se ambiente extensional, provavelmente do tipo retro arco, cujas rochas komatiÃticas (xistos magnesianos) encontradas apresentam transiÃÃo entre os tipos Munro e Barbeton, enquanto os metabasaltos toleÃticos (anfibolitos) exibem alto teor de ferro e magnÃsio. Estruturalmente, a Ãrea à marcada por deformaÃÃes polifÃsicas penetrativas, ocorridas no Brasiliano, com dobras isoclinais apertadas, recumbentes, alÃm de falhamentos de empurrÃo e cisalhamento dÃctil. Esses falhamentos sÃo reconhecidos, sobretudo, no contato entre esta sequÃncia metavulcanossedimentar e as rochas granito-gnÃissico-migmatÃticas do Complexo Cruzeta e entre as subunidades dominadas pelas rochas ultramÃficas e mÃficas. O grau metamÃrfico das associaÃÃes litolÃgicas à variÃvel, indo da fÃcies xisto verde alto a anfibolito alto, o que contrasta com as unidades do Complexo Cruzeta que se encontra frequentemente migmatizadas. Durante o evento Brasiliano houve tambÃm a intrusÃo dos leucogranitos. Nas bordas dos corpos intrusivos riacianos, prÃximos à zona de empurrÃo Queimadas, hà presenÃas de rochas fortemente hidrotermalizadas, marcadas por silicificaÃÃo, potassificaÃÃo, cloritizaÃÃo e carbonataÃÃo. Estas sÃo acompanhadas de sulfetaÃÃo, sendo hospedeiras de possÃveis mineralizaÃÃes de cobre e ouro do tipo Sulfetos Massivos VulcanogÃnicos ou mesmo lodes aurÃferos, uma vez que esta associaÃÃo ocorre junto Ãs zonas silicificadas ao longo de cisalhamento.
Petit, Anélia. "Processus physico-chimiques et impacts des fuites de CO₂ sur les hydrosystèmes proches surface lors d’un stockage géologique : approches expérimentales in-situ et en laboratoire." Thesis, Bordeaux 3, 2020. http://www.theses.fr/2020BOR30032.
Full textCO₂ is one of the main greenhouse gases that actively contributes to the global warming. The carbon capture and geological storage can limit the impacts of increases in CO₂ concentration in the atmosphere. The main quality of a storage site is to present a minimum probability of leakage. Therefore, it is essential to develop monitoring tools in order to assess their importance and plan corrective actions. The objective of this thesis is to study the physicochemical processes and the impacts of a CO₂ leak on near-surface hydrosystems (vadose zone (VZ) and aquifer) in a carbonate reservoir system of Oligocene age located within the Aquitaine basin. This study followed: i) an experimental approach at the Saint-Emilion pilot site (Gironde, France) where CO₂ injection took place into the aquifer from a borehole; ii) a core-scale laboratory approach to study the interactions of the CO₂-H₂O-CaCO₃ system. This work brings a new experimental approach by coupling geochemical and geophysical methods on the two scales of investigation. The baseline, carried out through the VZ the year before the injection experiment, studied the natural evolution of CO₂ during a hydrogeological cycle. After injection into the aquifer and according to our results, the electrical conductivity (σ), the pH, the concentrations of Ca²⁺, HCO₃- and CO₂ turned out to be good indicators, sufficiently sensitive and reactive, which can be used on a CO₂ storage site to monitor any physicochemical disturbances. Numerical simulations have made it possible to better understand the reaction and transport processes. Core-scale experiments quantified the influence of CO₂ effects on the electrical behavior of carbonate rock. Better definition of the relationship between the concentrations of CO₂, σ and pH makes it possible to pass from the core scale to the pilot site scale and vice versa. All the results of this thesis work highlight the importance of characterizing the petrophysical heterogeneity of the reservoir. It is also essential to establish a baseline, making it possible to distinguish natural variations in CO₂ from those induced by a leak. Coupling field observations and laboratory demonstrations increases the chances of detecting a CO₂ leak at a geological storage site
Medeiros, Vladimir Cruz de. "Evolu??o geodin?mica e condicionamento estrutural dos terrenos Pianc?-Alto Br?gida e Alto Paje?, dom?nio da zona transversal, NE do Brasil." Universidade Federal do Rio Grande do Norte, 2004. http://repositorio.ufrn.br:8080/jspui/handle/123456789/18350.
Full textCompanhia de Pesquisa de Recursos Minerais
This thesis aims to advance in the geological knowledge of the region comprising the Pianc?-Alto Br?gida (TPAB) and Alto paje? (TAP) terranes, in the Transversal Zone Domain (Borborema Province, NE Brazil), with the main objective of understanding the geodynamic evolution and the structural framework of these units. To reach this objective, and besides field work and interpretation of traditional aerial photographs, other tools were employed like of remote sensing products (Landsat 7 ETM+, aeroradiometrics, aeromagnetics and topographical images), lithogeochemical (whole rock) analyses and geochronological dating (U-Pb in zircon), besides integration with literature data. In the area, several precambrian geological units outcrop, represented in the TAP by the paleoproterozoic Serra Talhada and Afogados da Ingazeira complexes, Riacho Gravat? Complex (metavolcano-sedimentary sequence of Stenian-Tonian age) and Cariris Velhos orthogneisses (of Tonian age). The TPAB comprises the Santana do Garrote (lower unit) and Serra do Olho d'?gua (upper unit) formations of the Cachoeirinha Group (Neoproterozoic III), besides the Pianc? orthogneisses and Bom Jesus paragneisses; the latter correspond to an older (basement ?) block and a possible high grade equivalent of the Cachoeirinha Group (or Serid? Group ?), respectively. Several Brasiliano-age plutons occur in both terranes.The aeromagnetic data show the continuity, at depth, of the main shear zones mapped in the region. The Patos, Pernambuco, Boqueir?o dos Cochos, Serra do Caboclo, Afogados da Ingazeira/Jabitac? and Congo-Cruzeiro do Nordeste shear zones reach depths greater than to 6-16 km. The aeromagnetic signature of other shear zones, like the Juru one, suggests that these structures correspond to shallower crustal features. The satellite images (Landsat 7 ETM+) and aerogamaspectrometric images discriminate different geological units, contributing to the mapping of the structural framework of the region. The Serra do Caboclo Shear Zone was characterized as the boundary/suture between the TPAB and TAP. This structure is an outstanding, pervasive feature that separates contrasting geological units, such as the Neoproterozoic III Cachoeirinha Group in the TPAB and the Riacho Gravat? Complex and the Cariris Velhos metaplutonics, of Stenian-Tonian age, in the TAP. Occupying different blocks, these units are not found in authoctonous relations, like unconformities and intrusive contacts. Concerning the Cariris Velhos (ca. 1,0 Ga old) event is recorded by radiometric ages of the Riacho Gravat? Complex metavolcanics and intrusive augen and orthogneisses, all of them displaying geochemical affinities of arc or collisional settings. A structural signature of this event was not recorded in the region, possibly due to its low grade/low strain style, obliterated by the overprinting of younger, higher grade/high strain Brasiliano-age fabrics.The first tectonic event (D1) observed in the Cariris Velhos lithotypes presents contractional kinematics with transport to the NW. Neoproterozoic III geochronologic dates, obtained in late-D1 granitoids, imply a Brasiliano age (ca. 610-600 Ma) for this deformation event. The second tectonic event (D2) characterized in the region corresponds to the Brasiliano transcurrent kinematics of the outstanding shear zones and associated granitoid plutons. The geochronological (U-Pb in zircon) data obtained during this thesis also confirms the occurrence of the Cariris Velhos magmatic suite in the TAP, as well as the Neoproterozoic III age to the Cachoeirinha Group in the TPAB. The TAP (Riacho Gravat? Complex, augen and orthogneisses) is interpreted as a continental arc possibly accreted to a microcontinent during the Cariris Velhos (Stenian-Tonian) event. Later on, this terrane collided with the TPAB at the beginning of the Brasiliano orogeny (D1 contractional deformation), and both domins were reworked by the transcurrent shear deformation of the D2 event
A presente tese procurou avan?ar no conhecimento geol?gico da regi?o que abrange os terrenos Pianc?-Alto Br?gida (TPAB) e Alto paje? (TAP) , no Dom?nio da Zona Transversal (Prov?ncia Borborema, NE do Brasil), com o intuito principal de compreender a evolu??o geodin?mica e o condicionamento estrutural destas unidades. Para atingir este objetivo, al?m do trabalho de campo e da interpreta??o de fotografias a?reas tradicionais, foram utilizados outros produtos de sensoriamento remoto (imagens Landsat 7 ETM+, aeroradiom?tricas, aeromagn?ticas e topogr?ficas), an?lises litogeoqu?micas (rocha total) e data??es geocronol?gicas (U-Pb em zirc?o), al?m da integra??o com dados da literatura. Na regi?o afloram v?rias unidades geol?gicas precambrianas, representadas no T AP pelos complexos paleoproteroz?icos de Serra Talhada e Afogados da Ingazeira, Complexo Riacho Gravat? (seq??ncia metavulcanossedimentar de idade Esteniana-Toniana) e ortognaisses Cariris Velhos (Tonianos). No TPAB ocorrem as forma??es Santana do Garrote (unidade inferior) e Serra do Olho d'?gua (unidade superior) do Grupo Cachoeirinha (Neoproteroz?ico III), al?m dos ortognaisses de Pianc? e paragnaisses de Bom Jesus, estes dois ?ltimos podendo constituir um bloco mais antigo (embasamento ?) e um equivalente de alto grau do Grupo Cachoeirinha (ou Grupo Serid? ?), respectivamente. Em ambos os terrenos ainda ocorrem v?rios corpos degranit?ides brasilianos. Os dados aeromagn?ticos permitiram estimar a continuidade, em profundidade, das principais zonas de cisalhamento cartografadas na regi?o. As zonas de cisalhamento de Patos, Pernambuco, Boqueir?o dos Cochos, Serra do Caboclo, Afogados da Ingazeira/Jabitac? e Congo-Cruzeiro do Nordeste atingem profundidades . superiores a 6-16 km. A assinatura aeromagn?tica de outras zonas de cisalhamento, tais como a de Juru, sugere que tais estruturas correspondem a fei??es crustais mais rasas. As imagens de sat?lite (Landsat 7 ETM+) e aerogamaespectrom?tricas permitiram individualizar unidades geol?gicas distintas, bem como esbo?ar a trama estrutural da regi?o.A Zona de Cisalhamento Serra do Caboclo foi caracterizada como o limite/sutura entre o TPAB e TAP, tendo em vista ser uma estrutura marcante/penetrativa que separa unidades geol?gicas contrastantes, como o Grupo Cachoeirinha (Neoproteroz?ico III) no TPAB e o Complexo Riacho Gravat? (Esteniano-Toniano) e as metaplut?nicas Cariris Velhos, do TAP. Embora mais jovem, o Grupo Cachoeirinha n?o exibe contatos em n?o conformidade sobre o Complexo Riacho Gravat? ou ortognaisses Cariris Velhos, indicando que aquelas unidades estavam distanciadas quando da sua deposi??o. Com rela??o ao evento Cariris Velhos (ca. 1,0 Ga), a presen?a do mesmo ? indicada pelas metavulc?nicas do Complexo Riacho Gravat?, augen gnaisses e ortognaisses intrusivos, todos com afinidade geoqu?mica de contextos de arco ou colisional. Todavia, o registro estrutural associado a este evento n?o foi identificado, o que foi interpretado em fun??o de sua oblitera??o (constitu?am estruturas de baixo grau/baixo strain) pelos eventos subseq?entes. O primeiro evento tect?nico (01) observado nos litotipos de idade Cariris Velhos apresenta cinem?tica contracional com transporte para NW. Uma data??o do Neoproteroz?ico III, obtida em granit?ide tardi-D1, permite atribuir uma idade do in?cio do brasiliano para este eventodeformacional. O segundo evento (D2) caracterizado na regi?o corresponde ? tect?nica transcorrente Brasiliana, a qual ? materializada por marcantes zonas de cisalhamento e corpos gran?ticos associados. Os dados geocronol?gicos obtidos (U-Pb em zirc?o) confirmaram a presen?a do magmatismo Cariris Velhos no ?mbito do TAP, bem como a idade Neoproteroz?ica III para o Grupo Cachoeinha (TPAB) e para o evento tect?nico D1. O TAP (Complexo Riacho Gravat?, augen gnaisses e ortognaisses) deve constituir um arco continental (provavelmente acrescido a um microcontinente) formado durante o evento Cariris Velhos (Esteniano-Toniano). Este terreno colidiu com o TPAB no inicio da orog?nese brasiliana (deforma??o tangencial D1), sendo ambos os blocos afetados por retrabalhamento/cisalhamentos transcorrentes (evento D2) at? o final do Ciclo Brasiliano
Haddoumi, Hamid. "Les couches rouges (bathonien à barrémien) du synclinal des ait attab (haut atlas, Maroc) : Étude sédimentologique et stratigraphique." Nancy 1, 1988. http://www.theses.fr/1988NAN10144.
Full textShearer, A. "The application of ground based and airborne radiometric methods to aid geological mapping in the Olary Province, South Australia." Thesis, 1999. http://hdl.handle.net/2440/112811.
Full textThe Late Palaeoproterozoic Olary Domain, in the east of South Australia, has been extensively surveyed using airborne geophysical methods, including 256 channel radiometries. This detailed data set over outcropping areas is potentially a valuable aid to geological mapping. Ground-based radiometric data was obtained along profiles through the eastern Weekeroo Inlier and Ninnerie Hill areas in order to relate radioelement concentrations to lithological units. The Weekeroo Inlier traverse sampled all stratigraphic units present in the Olary Domain. The Ninnerie Hill traverse sampled Early Mesoproterozoic granitoids, migmatites and host metasediments. Two acquisition styles were attempted when collecting the ground-based data, with continuous recording to provide results that better replicate the airborne data than discrete sampling. The discrete sampling method was found to be heavily influenced by single point anomalies and not representative of the lithological average. Relative peaks and troughs on all three channels and total count data correspond well between the ground and airborne data. Correlation between the airborne data and the ground-based data was best for the K channel. For the Th channel the ground-based data was similar to the airborne data in wavelength and amplitude but was bulk shifted below the airborne data. The U channel data from the ground-based data detected the same anomalies as the airborne data but was an order of magnitude higher. The differences between the airborne and ground-based data could be due to errors in the calibration process that was performed for part of this project or due to the time difference in acquisition of the ground based and airborne data. Comparison of ground-based data with the geology of the survey areas revealed that radiometric data can provide useful lithological discrimination. Within the survey area some differences between metasediments, intrusive lithologies, and alteration types are determinable. The radiometric data can successfully differentiate between potasic and sodic granites. The low levels in all three measured radioelement channels can reflect occurrences of amphibolites. The data discriminates between pelites and psammites in that the pelites contain significantly higher levels of K, the difference between levels of Th and U are less extreme but are still discernable. As well as providing a mapping tool on the lithology scale, the interpretation of radiometric data can resolve sub-lithology scale variations.
Thesis (B.Sc.(Hons)) -- University of Adelaide, School of Physical Sciences, 1999
Cuba, Espinoza Miguel Angel. "Accounting for non-stationarity via hyper-dimensional translation of the domain in geostatistical modeling." Master's thesis, 2009. http://hdl.handle.net/10048/704.
Full textTitle from PDF file main screen (viewed on Feb. 19, 2010). A thesis submitted to the Faculty of Graduate Studies and Research in partial fulfillment of the requirements for the degree of Master of Science in Mining Engineering, Department of Civil and Environmental Engineering, University of Alberta. Includes bibliographical references.
Zhang, Keni, George J. Moridis, Yu-Shu Wu, and Karsten Pruess. "A DOMAIN DECOMPOSITION APPROACH FOR LARGE-SCALE SIMULATIONS OF FLOW PROCESSES IN HYDRATE-BEARING GEOLOGIC MEDIA." 2008. http://hdl.handle.net/2429/1166.
Full textSun, Yuhao. "Investigation of buoyant plumes in a quasi-2D domain : characterizing the influence of local capillary trapping and heterogeneity on sequestered CO₂ – : a bench scale experiment." Thesis, 2014. http://hdl.handle.net/2152/26451.
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