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Artykuły w czasopismach na temat "Petrology"
Li, Hui. "Petrology’s Role in Unveiling Geochemical Controls on Soil Contamination: China’s Environmental Assessment (2000-2022)". Innovation in Science and Technology 3, nr 1 (styczeń 2024): 40–50. http://dx.doi.org/10.56397/ist.2024.01.06.
Pełny tekst źródłaKretz, Ralph. "Petrology". Earth-Science Reviews 30, nr 3-4 (czerwiec 1991): 328–29. http://dx.doi.org/10.1016/0012-8252(91)90008-4.
Pełny tekst źródłaMichel-Lévy, Mireille Christophe, i Michèle Bourot-Denise. "A New Look at the Galim (a) and Galim (b) Meteorites". Mineralogical Magazine 52, nr 367 (wrzesień 1988): 519–25. http://dx.doi.org/10.1180/minmag.1988.052.367.12.
Pełny tekst źródłaGaetani, G. A. "SOFTWARE:Igneous Petrology". Science 282, nr 5395 (4.12.1998): 1834–35. http://dx.doi.org/10.1126/science.282.5395.1834.
Pełny tekst źródłaTankard, Anthony J. "Sedimentary Petrology". Sedimentary Geology 152, nr 1-2 (wrzesień 2002): 159–60. http://dx.doi.org/10.1016/s0037-0738(01)00254-8.
Pełny tekst źródłaVarma, Atul Kumar. "Organic Petrology". Gondwana Research 3, nr 2 (kwiecień 2000): 284–86. http://dx.doi.org/10.1016/s1342-937x(05)70115-5.
Pełny tekst źródłaBurley, Brian J. "Igneous petrology". Geochimica et Cosmochimica Acta 52, nr 3 (marzec 1988): 798. http://dx.doi.org/10.1016/0016-7037(88)90345-6.
Pełny tekst źródłaHelz, R. T. "Igneous petrology". Journal of Volcanology and Geothermal Research 24, nr 3-4 (maj 1985): 361–62. http://dx.doi.org/10.1016/0377-0273(85)90080-0.
Pełny tekst źródłaPostma, George. "Sedimentary petrology". Sedimentary Geology 84, nr 1-4 (kwiecień 1993): 249. http://dx.doi.org/10.1016/0037-0738(93)90064-c.
Pełny tekst źródłaMarsh, B. D. "Enclaves and Granite Petrology. Developments in Petrology, 13." Lithos 29, nr 1-2 (grudzień 1992): 158–59. http://dx.doi.org/10.1016/0024-4937(92)90040-6.
Pełny tekst źródłaRozprawy doktorskie na temat "Petrology"
Amaral, Paulo Giovany Quadros do [UNESP]. "Caracterização radiométrica e de exalação de Radônio em rochas ornamentais silicáticas beneficiadas no Estado do Espírito Santo". Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/92886.
Pełny tekst źródłaConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
O trabalho realizou avaliações relativas ao comportamento radiométrico e de exalação do gás radônio em rochas ornamentais e de revestimento exploradas nos estados brasileiros de Minas Gerais e Espírito Santo. Sabendo que as rochas apresentam em sua constituição determinados teores de elementos radioativos tais como 87Rb, 40K, 238U, 235U e 232Th, sendo os três últimos a gerar em suas séries por decaimento o Rn e, apesar da baixa concentração natural do mesmo nos diversos ambientes e de sua curta meia vida de 3,8 dias, adquire importância pelo fato de seu decaimento gerar os elementos metálicos 218Po, 214Pb, 214Bi e 214Po que podem se fixarem nos pulmões causando patologias importantes nas vias respiratórias, especificamente na indução de metástases. Devido à importância de conhecer as concentrações do gás radônio nos ambientes de convívio humano foram escolhidas 10 rochas silicáticas de variedade geológica e de destaque comercial beneficiadas por empresas de Cachoeiro de Itapemirim – ES, compreendendo rochas magmáticas dadas por diorito, sienito, charnockito, monzogranito e três pegmatitos graníticos e por três rochas metamórficas. O estudo, envolvendo os dados radiométricos de U, Th, K e de monitoramento de exalação do gás 222Rn, revela uma boa correlação entre os parâmetros petrográficos e índices físicos das rochas. Os teores de U variaram de 2,9 ppm a 37 ppm e Th de 0,3 ppm a 84 ppm, mostrando que as concentrações destes radionuclídeos característicos para cada tipo de rocha, revelam a perfeita coerência entre a presença ou ausência de minerais acessórios detentores de elementos radioativos. A quantidade de exalação de radônio fornecida pelas rochas está diretamente relacionada aos aspectos petrográficos de cada material, principalmente ao grau e tipos de...
This work carried out assessments on the radiometric behavior and exhalation of radon gas in dimensional and surfacing stones exploited in the Brazilian states of Minas Gerais (MG) and Espírito Santo (ES). The rocks usually contain different levels of the radionuclides 87Rb, 40K, 238U, 235U and 232Th, the last three forming radioactive decay series, where different Rn isotopes occur. Despite its low natural activity concentration in the environment, 222Rn (half life = 3.8 days) is an important radioactive noble gas because can generate the heavy metals 218Po, 214Pb, 214Bi and 214Po which can settle in the lungs, causing major diseases in the respiratory tract, including the induction of metastasis. Ten silicate rocks of variable composition and commercial use have been selected for evaluating the radon presence in human environments. They have been benefited by companies in Cachoeiro de Itapemirim (ES) and include magmatic (diorite, syenite, charnockite, monzogranite, granitic pegmatite) and metamorphic rocks. The study involved the acquisition of U, Th and K radiometric data, as well the monitoring of the 222Rn gas exhalation, coupled with petrographic and physical rock indices. The U and Th content range was 2.9-37 and 0.3-84 ppm, respectively, where the radioelements content was consistent with the presence or absence of accessory minerals hosting them. The amount of radon emanated from the rocks was directly related to the petrography of each material, especially the degree and types of microcracks and the contacts between minerals that are determinants of the rocks microporous net, thus, leading to a greater or lesser permeability, which in turn controls the exhalation. The comparison of the 222 Rn generated by the rock with the amount effectively exhaled indicated that the exhalation rate is negligible... (Complete abstract click electronic access below)
Amaral, Paulo Giovany Quadros do. "Caracterização radiométrica e de exalação de Radônio em rochas ornamentais silicáticas beneficiadas no Estado do Espírito Santo /". Rio Claro : [s.n.], 2011. http://hdl.handle.net/11449/92886.
Pełny tekst źródłaCoorientador: Daniel Marcos Bonotto
Banca: Antonio Carlos Artur
Banca: Fabiano Cabañas Navarro
Resumo: O trabalho realizou avaliações relativas ao comportamento radiométrico e de exalação do gás radônio em rochas ornamentais e de revestimento exploradas nos estados brasileiros de Minas Gerais e Espírito Santo. Sabendo que as rochas apresentam em sua constituição determinados teores de elementos radioativos tais como 87Rb, 40K, 238U, 235U e 232Th, sendo os três últimos a gerar em suas séries por decaimento o Rn e, apesar da baixa concentração natural do mesmo nos diversos ambientes e de sua curta meia vida de 3,8 dias, adquire importância pelo fato de seu decaimento gerar os elementos metálicos 218Po, 214Pb, 214Bi e 214Po que podem se fixarem nos pulmões causando patologias importantes nas vias respiratórias, especificamente na indução de metástases. Devido à importância de conhecer as concentrações do gás radônio nos ambientes de convívio humano foram escolhidas 10 rochas silicáticas de variedade geológica e de destaque comercial beneficiadas por empresas de Cachoeiro de Itapemirim - ES, compreendendo rochas magmáticas dadas por diorito, sienito, charnockito, monzogranito e três pegmatitos graníticos e por três rochas metamórficas. O estudo, envolvendo os dados radiométricos de U, Th, K e de monitoramento de exalação do gás 222Rn, revela uma boa correlação entre os parâmetros petrográficos e índices físicos das rochas. Os teores de U variaram de 2,9 ppm a 37 ppm e Th de 0,3 ppm a 84 ppm, mostrando que as concentrações destes radionuclídeos característicos para cada tipo de rocha, revelam a perfeita coerência entre a presença ou ausência de minerais acessórios detentores de elementos radioativos. A quantidade de exalação de radônio fornecida pelas rochas está diretamente relacionada aos aspectos petrográficos de cada material, principalmente ao grau e tipos de... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: This work carried out assessments on the radiometric behavior and exhalation of radon gas in dimensional and surfacing stones exploited in the Brazilian states of Minas Gerais (MG) and Espírito Santo (ES). The rocks usually contain different levels of the radionuclides 87Rb, 40K, 238U, 235U and 232Th, the last three forming radioactive decay series, where different Rn isotopes occur. Despite its low natural activity concentration in the environment, 222Rn (half life = 3.8 days) is an important radioactive noble gas because can generate the heavy metals 218Po, 214Pb, 214Bi and 214Po which can settle in the lungs, causing major diseases in the respiratory tract, including the induction of metastasis. Ten silicate rocks of variable composition and commercial use have been selected for evaluating the radon presence in human environments. They have been benefited by companies in Cachoeiro de Itapemirim (ES) and include magmatic (diorite, syenite, charnockite, monzogranite, granitic pegmatite) and metamorphic rocks. The study involved the acquisition of U, Th and K radiometric data, as well the monitoring of the 222Rn gas exhalation, coupled with petrographic and physical rock indices. The U and Th content range was 2.9-37 and 0.3-84 ppm, respectively, where the radioelements content was consistent with the presence or absence of accessory minerals hosting them. The amount of radon emanated from the rocks was directly related to the petrography of each material, especially the degree and types of microcracks and the contacts between minerals that are determinants of the rocks microporous net, thus, leading to a greater or lesser permeability, which in turn controls the exhalation. The comparison of the 222 Rn generated by the rock with the amount effectively exhaled indicated that the exhalation rate is negligible... (Complete abstract click electronic access below)
Mestre
Silva, Jesué Antonio da. "Caracterização geológica e tecnológica de unidades gnáissicas e graníticas do sudoeste de Mato Grosso para fins de exploração como rochas ornamentais e para revestimento /". Rio Claro : [s.n.], 2009. http://hdl.handle.net/11449/103001.
Pełny tekst źródłaAbstract: The study of potentiality and qualification as a dimension stone and covering of granites and oriented rocks occurring in the south of the Mato Grosso State, Brazil, using geological, petrographical, technological and alterability characterization aims to increase the offer of new varieties of dimension stones in the state. It also aims to propitiate the economic transformation of this mineral resource adding new esthetic varieties in according to technological patterns and adequate identifying and typology. The research also contributes to the implantation and development of this productive chain to the social and economical development of the state. In the studied areas located at the south region of the Mato Grosso State fourteen rock types for dimension stones are recognized. They include granites, gabbros, gneisses and amphibolites grouped by the colors in red, grey and black types and showing economic potential of plowing. The results obtained in the technological essay show that the rock parameters are sited within the standard limits established by technical rules and obey satisfactorily the limit values fixed for granites in internal and external covering uses
Orientador: Antonio Misson Godoy
Coorientador: Amarildo Salinas Ruiz
Banca: Antônio Carlos Artur
Banca: Marcos Aurélio Faria de Oliveira
Banca: Antonio João Paes de Barros
Banca: Antenor Paraguassú
Doutor
Lima, Filipe Goulart. "Morro do Níquel : fragmento de manto exumado na Faixa Brasília Meridional /". Rio Claro, 2017. http://hdl.handle.net/11449/151669.
Pełny tekst źródłaCoorientador: Gergely Andres Julio Szabó
Banca: Norberto Morales
Banca: Guillermo Rafael Beltran Navarro
Banca: Tiago da Rocha Karniol
Banca: Larissa Marques Barbosa de Araújo
Resumo: Este trabalho apresenta os resultados dos estudos petrogenéticos detalhados realizados nos serpentinitos que constituem do Morro do Níquel, maciço ultrabásico mineralizado em níquel laterítico, situado na Faixa Brasília Meridional, ao norte da Zona de Sutura de Alterosa, localizado no Município de Pratápolis (MG), sul/sudoeste do Estado de Minas Gerais, Brasil. Os serpentinitos possuem cor verde escuro a preto, aspecto maciço e é constituído por mais de 95% de lizardita/crisotilo, com ocorrências localizadas de antigorita. O padrão estrutural do maciço é compatível com aqueles gerados pela deformação de em um corpo rígido em matriz dúctil dentro de zona de cisalhamento. Os dados mineralógicos, petrográficos e geoquímicos, em associação com os de campo e de descrição de testemunho de sondagem rotativa, apontam que o protólito destas rochas seria um corpo dunítico de granulação média a grossa e textura granular, suas dimensões seriam superiores a 800 x 400 metros e com mais de 350 metros de espessura. Os dados obtidos indicam que o dunito é mantélico e possibilitou propor um modelo evolutivo desde a exumação do manto até a colocação sobre embasamento TTG e serpentinização. A exumação se inicia com o adelgaçamento da crosta continental durante a instalação de um sistema rifte, que teria evoluído ao ponto de atingir a "super extensão" da crosta e o desenvolvimento de uma crosta oceânica. Com o fechamento do oceano decorrente de colisão continental, no neoproterozóico, o corpo dunítico foi alojado sobre o embasamento cristalino, na margem passiva da placa que contém o Cráton São Francisco. A serpentinização do dunito ocorreu tardi-pós aloctonia, catalisada pela atuação do Cinturão de Cisalhamento do Campo do Meio, em condições de fácies visto verde, fácies prehnita-pumpelyíta, ... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: This work presents results from detailed petrogenetic studies performed on the Morro do Níquel (Nickel Hill) serpentinites, an ultrabasic massif mineralized in lateritic nickel, located in the Southern Brasília Belt, north of the Alterosa Suture Zone, Municipality of Pratápolis (MG), southwest of the State of Minas Gerais-Brazil. The serpentinite has a dark color, apparently massive aspect and consist of more than 95% lizardite / chrysotile, with localized occurrences of antigorite. The structural pattern of the massif is compatible with those generated by the shear of a rigid body in a ductile matrix within a shear zone. The mineralogical, petrographic and geochemical data, in association with the field and drill hole logs description, indicate that the protolith of these rocks would be a dunitic body of medium to large granulation and granular texture, with dimensions superior to 800 x 400 meters and with more than 350 meters of thickness. The obtained data indicate that the dunite is mantellic and it was possible to propose an evolutionary model from the exhumation of the mantle dunitc body to the emplacement on the TTG basement and serpentinization. The exhumation begins with the thinning of the continental crust during the installation of a rift system, evolving to allow the hyper-extension of the crust until the development of an oceanic crust. With the continental collision, in the Neoproterozoic, the dunite was hosted on the crystalline basement, in the passive margin of the plate that contains the San Francisco Craton. The dunite serpentinization occurred late-post aloctonia, catalyzed by the Campo do Meio Shear Belt, under conditions of green facies, prehnite-pumpelyite facies, with low fugacity of oxygen and sulfur and high H2 (aq.) activity
Doutor
Pazeto, Abiliane de Andrade [UNESP]. "Correlação entre propriedades petrográficas e comportamento tecnológico e de alterabilidade das rochas ornamentais silicáticas Diamante Negro (BA), Ocre Itabira e Banco Galaxy (ES)". Universidade Estadual Paulista (UNESP), 2011. http://hdl.handle.net/11449/92883.
Pełny tekst źródłaConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
O objetivo da presente pesquisa foi estabelecer a correlação entre as propriedades petrográficas e o comportamento tecnológico e de alterabilidade de três materiais utilizados como rochas ornamentais e para revestimento. Os tipos petrográficos correspondem a um microgabro (Diamante Negro), um hornblenda sienito pórfiro com quartzo (Ocre Itabira) e um granito pegmatóide com granada e sillimanita (Branco Galaxy), sendo o primeiro proveniente do estado da Bahia e os dois últimos do estado do Espírito Santo. Os materiais foram caracterizados petrograficamente e submetidos a uma bateria de ensaios físico-mecânicos e de alteração acelerada que compreenderam determinações de índices físicos, desgaste abrasivo Amsler, compressão uniaxial simples, resistência à flexão 3 e 4 pontos, impacto de corpo duro, velocidade de propagação de ondas ultrassônicas longitudinais, coeficiente de dilatação térmica linear e resistência ao ataque químico sob efeito de compostos agressivos e em câmaras saturadas em atmosfera salina e dióxido de enxofre (SO2). Os resultados demonstram que o comportamento tecnológico das rochas está intrinsecamente relacionado aos aspectos mineralógicos, estruturais e texturais inerentes a cada tipo petrográfico. O Diamante Negro é o material detentor dos maiores índices físico-mecânicos, uma vez que suas características petrográficas são marcadas por granulação fina, bom entrelaçamento mineral, e baixo grau de microfissuramento. Quanto à alteração acelerada, no entanto, apresentou variações cromáticas consideráveis, dado seu elevado teor de minerais máficos. O tipo comercial Ocre Itabira também apresentou boas propriedades tecnológicas, com valores inferiores ao Diamante Negro devido principalmente à sua granulação...
The objective of this research was correlating petrographical properties to the technological and alterability behavior of three materials used as ornamental and building stones. The samples correspond to a microgabbro (Diamante Negro), a hornblende porphiral syenite with quartz and (Ocre Itabira) a pegmatoid granite with garnet and sillimanite (Branco Galaxy), being the first sample originating from the Bahia state and the last one from Espírito Santo state. The materials were petrographically analyzed and submitted to physical mechanics tests and chemical alterability including measurements of physical indexes, abrasion resistance, compressive strength, modulus of rupture, flexural strength, impact strength, ultrasonic pulse velocity, linear thermal expansion coefficient and resistance to the chemical attack accomplished by aggressive compositions and chambers which simulate both sea-salt and sulphur dioxide weathering. The results reveal the influence of minerals, textural and structural features over the studied stones behavior during the performed tests. Diamante Negro is the material which showed the highest physical-mechanics properties, once their petrographical parameters correspond to fine grain size, good mineral interlacement, and low microcrack degree. However, relating to the chemical alterability it showed considerable chromatic deterioration, given its high content of mafic minerals. The commercial type Ocre Itabira also presented good technological properties, with inferior values than Diamante Negro due to its large grain size granulation and high degree of relative microcracking. The brownish coloration of potash feldspars porphyries present in its mineralogical composition turned the effects caused by the chemical reagents less evident. In general, Branco Galaxy presented the smallest values of... (Complete abstract click electronic access below)
Silva, Jesué Antonio da [UNESP]. "Caracterização geológica e tecnológica de unidades gnáissicas e graníticas do sudoeste de Mato Grosso para fins de exploração como rochas ornamentais e para revestimento". Universidade Estadual Paulista (UNESP), 2009. http://hdl.handle.net/11449/103001.
Pełny tekst źródłaConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)
Os estudos geológicos, petrográficos, geoquímicos e tecnológicos (físicosmecânicos) e de alterabilidade de exposições de extensas áreas de rochas cristalinas no sudoeste do Estado do Mato Grosso, com objetivo da qualificação como rocha ornamental e de revestimento, possibilitou a oferta de novas variedades estéticas de rochas que apresentem a adequada identificação, tipificação e padronização das características tecnológicas. Visa-se ampliar a oferta deste bem mineral no estado, atualmente um dos menores produtores do pais, contribuindo assim para a implantação e desenvolvimento desta cadeia produtiva de transformação e no desenvolvimento sócio-econômico do Estado. As áreas propostas para o estudo localizam-se na região sudoeste do estado, que detém um dos maiores tratos geológicos relativamente conhecidos, além da sua posição geográfica favorecida pela malha viária, sendo descritos 10 tipos entre granitos, diabásios, gnaisses e anfibolitos agrupados nas cores vermelha, cinza e preta e que demonstram possibilidade econômica de lavra. Os resultados obtidos nos ensaios tecnológicos das variedades mostram que os parâmetros analisados situam-se dentro dos limites padrões estabelecidos pelas normas e obedecem satisfatoriamente os valores limítrofes fixados para granitos utilizados em revestimento em ambientes interiores e exteriores.
The study of potentiality and qualification as a dimension stone and covering of granites and oriented rocks occurring in the south of the Mato Grosso State, Brazil, using geological, petrographical, technological and alterability characterization aims to increase the offer of new varieties of dimension stones in the state. It also aims to propitiate the economic transformation of this mineral resource adding new esthetic varieties in according to technological patterns and adequate identifying and typology. The research also contributes to the implantation and development of this productive chain to the social and economical development of the state. In the studied areas located at the south region of the Mato Grosso State fourteen rock types for dimension stones are recognized. They include granites, gabbros, gneisses and amphibolites grouped by the colors in red, grey and black types and showing economic potential of plowing. The results obtained in the technological essay show that the rock parameters are sited within the standard limits established by technical rules and obey satisfactorily the limit values fixed for granites in internal and external covering uses
Janasi, Valdecir de Assis. "Geologia e petrologia do maciço monzodiorítico-monzonítico de Piracaia-SP". Universidade de São Paulo, 1986. http://www.teses.usp.br/teses/disponiveis/44/44135/tde-26092012-145409/.
Pełny tekst źródłaThe Piracaia massif, located in the NE part of the State of São Paulo, crops out over 32 km2. Rock types cover a wide compositional range (diorites to alkali-feldspar quartz syenites and related granites), similar to the \"alkaline\" granitoid tendency of Lameyre & Bowden (1982), but monzodiorites and monzonites are by far predominant. Most rocks show, at least in part, tectonic foliation and metamorphic recrystallization. The massif was emplaced in the area of contact between the Socorro orthogneisses and migmatized supracrustal units of the Piracaia Metamorphic Complex. Locally, late granitoid veins intruded the massif with, but the contact and structural relations of the massif with nearby anatectic granites are unknown. Foliation within the massif is attributed to the regional \'F IND.n+2\' phase of deformation. Monzodiorites and monzonites, which comprise the central part of the massif, were intruded along their borders by late differentiated facies, apparently under forceful conditions. The intrusion sequence proceeded from more mafic to more felsic rock types. The principal primary minerals observed in preserved igneous textures are plagioclase, alkali feldspar, biotite and augite; Fe-hypersthene is found in some monzonites, and quartz in late differentiates. Main accessory minerals are apatite, magnetite and ilmenite. Crystallization usually began with plagioclase and biotite, followed by augite and alkali feldspar, this last mineral usually observed as an interstitial phase. Resorption of plagioclase was probably important in many monzonites and monzodiorites, alkali feldspar occasionally being seen as mantles around this mineral. The presence of augite and biotite in these rocks is a result of high K activity in the magmas, coupled with a relatively low H2O content. The chemical tendency, towards an increased Fe/ (Fe + Mg) ratio with differentiation in both minerals, is compatible with crystallization under diminishing fH2O and fO2. Syenitic ocellar and styctolithic \"segregation\" structures, in part later than the development of a foliation, occur pervasively in many monzodiorites and monzonites. Larger felsic veins are also found, in part later than the earliest segregations. The earliest rock types (diorites to leuco-monzonites) show petrographic and chemical relations compatible with derivation by crystal fractionation, possibly controlled by crystal extraction from a predominantly liquid mush. Late rock types, such as small segregations and larger masses of felsic differentiates, may represent residual liquids extracted from largely crystalline mushes. Thus, normal differentiation processes are possibly responsible for the generation of both early (predominant) rocks as well as late, more felsic varieties. On the other hand, an hypothesis of partial melting of and already crystallized intermediate rock mass (early monzodiorites and monzonites), coupled with segregation, is at least compatible with the distribution pattern of some trace elements in the late felsic facies. Crystallization processes are nevertheless favoured, since the compositions of minerals in segregations are very similar to those found in early rock types, and the temperature requirements for melting of intermediate, relatively dry protoliths seem to be unreasonably high. Petrogenetic hypotheses were tested using subtraction and trace-element diagrams. The separation of early-crystallizing minerals (plagioclase, biotite and augite) could reproduce differentiation paths like those shown by the Piracaia rocks. Up to 50% plagioclase would have to be fractionated in the early stages, and even more later; biotite and, to a lesser extent, augite, would have to be separated in significant amounts to account for major and trace element trends. Initial metamorphism within the massif is considered \"syn-plutonic\", related to the beginning of segregation; primary felsic and mafic minerals recrystallized in response to diminishing (but still high) temperatures and an increase in fH2O. Later metamorphism at diminishing temperatures generated hornblende (mainly from pyroxenes), and this, in turn, is replaced by lower-grade assemblages, mainly greenish biotite and epidote. Up to 15% of the massif shows both low-grade mineralogy and tectonic gneissic foliation; H2O influx, which favoured both deformation and recrystallization, was probably most significant along the marginal parts of the massif. A Rb-Sr whole-rock reference isochrone of 582 ± 13 Ma was obtained for the metamorphosed late facies. This value is interpreted as a metamorphic homogenization age, more or less contemporaneous with the \'F IND.n+2\' regional phase of deformation.
Lima, Maria Angélica Batista. "Estudo do comportamento dos gnaisses Casablanca, Juparaná Delicato e Giallo Falésia (Ceará - Brasil) em atmosfera salina /". Rio Claro : [s.n.], 2006. http://hdl.handle.net/11449/102989.
Pełny tekst źródłaAbstract: In this research, aggressive atmosphere conditions (marine atmosphere) were simulated using three commercial rock types (Casablanca, Delicato and Falésia). The gneisses were located in two different saline mist weathering chambers that operating in continuous and cyclical tests process type. The technological tests for control and analyses allowed the understanding and interpretation of the observed weathering processes after respective time of exposition of the stone. The choice of technological properties was guided by the influence and/or dependence degree of weathering processes with the saline chamber dimensions (influence on size and number of samples). The continuous test method have used a chamber Model Bass USC with the temperature kept in (35±2)°C, the air pressure compressed in 70 KPa and the saline solution (5% of NaCl) with pH values between 6.5 and 7.2. In that test, the gneisses were represented by 73 (seventy three) samples in the chambers that had been removed at the end of 360, 720 and 1080 hours of exposition hours to the control technological tests, in order to monitoring alterations occurred during the respective exposition. The cyclical test have used chamber Model BASS MP-GS- 01/2004. For this test, the samples passed by 30 cycles alternated with saline mist for 6 hours and 12 hours of drying for each concluded cycle. The temperature was kept in (40±5) °C, the air pressure compressed in 70 KPa and the saline solution (10% of NaCl) with pH between 6.5 and 7.2. In that test the gneisses were represented by 18 (eighteen) 5 cm cubic samples in the chambers. These samples had been removed after completing 15 cycles, for visual inspection and photographic register. After 30 cycles, the samples have been weighed in analytical scale and evaluated alterations during the respective exposition period. The two chosen ways (continuous and cyclic accelerated tests) allow... (Complete abstract click electronic access below)
Orientador: Antonio Carlos Artur
Coorientador: José de Araújo Nogueira Neto
Banca: Antônio Gilberto Costa
Banca: Francisco Wilson Hollanda Vidal
Banca: Tamar Bortolozzo Galembeck
Banca: Maria Heloísa Barros de Oliveira Frascá
Doutor
Leme, Thaís Guitzlaf. "Geotermobarometria das rochas do Grupo Araxá e do Complexo Guaxupé na região de Guaxupé - Nova Resende, MG /". Rio Claro, 2019. http://hdl.handle.net/11449/180465.
Pełny tekst źródłaBanca: Antenor Zanardo
Banca: Filipe Gourlat Lima
Resumo: A área de estudo situa-se no sul da Faixa Brasília Meridional, no sudoeste do estado de Minas Gerais e compreende uma faixa entre os municípios de Guaxupé, Monte Belo, Nova Resende e São Pedro da União, no contato entre as unidades que compõem o Complexo Guaxupé e litotipos atribuídos ao Grupo Araxá. Esta região situa-se em uma zona de blocos crustais amalgamados durante a orogênese brasiliana no Neoproterozoico e marca o limite entre terrenos granulíticos (Complexo Guaxupé) e litotipos adjacentes envolvidos no processo colisional e pós colisional (Grupo Araxá). Este contato é delimitado pela Zona de Cisalhamento Varginha, que representa uma quebra nas condições metamórficas entre as unidades. Neste trabalho são apresentados dados petrográficos, de química mineral e geotermobarométricos (média P-T calculada pelo software THERMOCALC, software RCLC e geotermômetros Zr-em-rutilo e Ti-em-quartzo) com o objetivo de investigar e determinar as condições de pressão e temperatura dos litotipos que ocorrem no contato entre o Complexo Guaxupé e o Grupo Araxá nessa região. Na área de estudo, o Complexo Guaxupé é constituído principalmente por rochas ortoderivadas de natureza básica a ácida, com predomínio de composições intermediárias, representadas por granulitos (ortopiroxênio gnaisses) félsicos a máficos, com intercalações de anfibólio e/ou biotita gnaisses (sem ortopiroxênio), além de intercalações de metassedimentos com sillimanita, granada, ortoclásio e rutilo. O Grupo Araxá é cons... (Resumo completo, clicar acesso eletrônico abaixo)
Abstract: The study area is located at the south of Southwerst Brasília Belt, southeast of Minas Gerais, and it comprehends a strip among the cities of Guaxupé, Monte Belo, Nova Resende and São Pedro da União, in contact with unities that compose the Guaxupé Complex and lithotypes attributed to the Araxá Group. This region is in a zone with crustal blocks amalgamated during the Brazilian orogenesis in Neoproterozoic, and it determines the limit between granulitic terrains (Guaxupé Complex) and adjacent lithotypes involved in collisional and post-collisional processes (Araxá Group). The contact is delimitated by the Varginha Shear Zone, which represents a disruption of metamorphic conditions amid the unities. This paper presents petrographic, mineral chemistry and geothermobarometric data (average P-T calculated by the THERMOCALC software, software RCLC and geothermometers Zr-in-rutile and Ti-in-quartz) in order to investigate and determine the pressure and temperature conditions of the lithotypes that occur in the contact between the Guaxupé Complex and Araxá Group. In the study area, the Guaxupé Complex consists especially ortho-derivative rocks of basic to acidic nature, represented by felsic to mafic granulites (orthopyroxene gneisses), and amphibole and/or biotite gneisses intercalations (orthopyroxene free), as well as metasediments intercalations with sillimanite, garnet, orthoclase and rutile. The Araxá Group consists of pelitic to psamo-pelites metasediments with orthogneisses,... (Complete abstract click electronic access below)
Mestre
Torró, i. Abat Lisard. "The shift from subduction-initiation to true subduction in intra-oceanic systems: tectonic, magmatic and metallogenic evolution of Early Cretaceous arc-related units of Central and Oriental cordilleras in the Dominican Republic". Doctoral thesis, Universitat de Barcelona, 2017. http://hdl.handle.net/10803/401648.
Pełny tekst źródłaLas formaciones Maimón y Los Ranchos en las Cordilleras Central y Oriental, República Dominicana, Isla la Española, son representativas de la serie toleítica más primitiva en las Grandes Antillas del Caribe. Más allá de su importancia para el estudio de la evolución magmática temprana del arco-isla caribeño, estas formaciones son también reconocidas por alojar el depósito VMS de Cerro de Maimón y el depósito epitermal de clase mundial de Pueblo Viejo, ambos en producción en la actualidad, así como de una serie de depósitos y mineralizaciones de menor tamaño. Por consiguiente, el estudio integrado de las series volcánicas encajantes, de las alteraciones hidrotermales y de las mineralizaciones de sulfuros desde un punto de vista petrográfico, geoquímico y geocronológico representa una excelente oportunidad para entender la evolución metalogenética durante la evolución temprana de sistemas subductivos en contextos intraoceánicos. En esta Tesis, nuevos datos de geoquímica de roca total (elementos mayores y traza e isótopos radiogénicos), estudios petrográficos de detalle del encajante, de las alteraciones hidrotermales y de las mineralizaciones de sulfuros, y datos sobre su geocronología por medio de edades U-Pb en zircón y Re-Os en molibdenita, son presentados y discutidos. De muro a techo, los basaltos de la Formación Maimón (metamorfizadas en facies transicionales de esquistos verdes-esquistos azules) y de la sección basal de la Formación Los Ranchos progresan desde basaltos toleíticos empobrecidos en Ti y LREE a boninitas y a basaltos toleíticos empobrecidos en Ti normales. La sección superior de la Formación Los Ranchos, además, aloja andesitas basálticas, dioritas, monzodioritas y andesitas con afinidades toleíticas transicionales a calcoalcalinas y calcoalcalinas. Estas variaciones a lo largo de la secuencia estratigráfica equivalen a las documentadas en basaltos de arco en ofiolitas de inicio de subducción. La extrusión de las rocas volcánicas de la Formación Maimón es contextualizada en el ante-arco, cerca de la zona de subducción de la dorsal proto- caribeña y en un escenario de subducción caliente. En cambio, las rocas ígneas de Los Ranchos se emplazaron en la zona de ante-arco y axial de arco, y las litofacies observadas en sus depósitos volcánicos y volcanosedimentarios indican la progresión desde una depositación en contextos submarinos a una en contextos sub-aéreos. Los batolitos plagiotonalíticos, los stocks plagioriolíticos y las plagioriolitas de ambas formaciones presentan afinidades toleíticas y signaturas tipo M. Las mineralizaciones VMS alojadas en la Formación Maimón y en la secuencia basal de Los Ranchos se formaron durante un régimen de inicio de subducción. En cambio, las mineralizaciones tipo pórfido Cu(Mo) – epitermales de alta sulfuración encajados en la secuencia superior de Los Ranchos se formaron aprox. a 112 Ma, previsiblemente conectadas genéticamente a intrusivos ácidos, durante un régimen de subducción verdadera.
Książki na temat "Petrology"
Sen, Gautam. Petrology. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-38800-2.
Pełny tekst źródłaZhaonai, Li, Qi Jianzhong i Zhang Zhaochong. Igneous Petrology. London: CRC Press, 2021. http://dx.doi.org/10.1201/9780429070877.
Pełny tekst źródłaMiyashiro, Akiho. Metamorphic petrology. New York: Oxford University Press, 1993.
Znajdź pełny tekst źródłaH, Christiansen Eric, red. Igneous petrology. Malden, Mass: Blackwell Science, 2001.
Znajdź pełny tekst źródłaMcBirney, Alexander R. Igneous petrology. Wyd. 2. Boston: Jones and Bartlett Publishers, 1993.
Znajdź pełny tekst źródłaA, Hall. Igneous petrology. Harlow: Longman, 1987.
Znajdź pełny tekst źródłaMiyashiro, Akiho. Metamorphic petrology. London: UCL Press, 1994., 1994.
Znajdź pełny tekst źródłaHall, Anthony. Igneous petrology. Harlow, Essex, England: Longman Scientific & Technical, 1987.
Znajdź pełny tekst źródłaE, Carmichael Ian S., i Mineralogical Society (Great Britain), red. Volcanic petrology. London: Mineralogical Society of Great Britain & Ireland, 2004.
Znajdź pełny tekst źródłaMitchell, Roger H., i Steven C. Bergman. Petrology of Lamproites. Boston, MA: Springer US, 1991. http://dx.doi.org/10.1007/978-1-4615-3788-5.
Pełny tekst źródłaCzęści książek na temat "Petrology"
Sen, Gautam. "Introduction". W Petrology, 1–18. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38800-2_1.
Pełny tekst źródłaSen, Gautam. "Subduction Zone Magmas". W Petrology, 209–42. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38800-2_10.
Pełny tekst źródłaSen, Gautam. "Alkaline and Ultra-Alkaline Rocks, Carbonatites, and Kimberlites". W Petrology, 243–60. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38800-2_11.
Pełny tekst źródłaSen, Gautam. "Anorthosites and Komatiites". W Petrology, 261–76. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38800-2_12.
Pełny tekst źródłaSen, Gautam. "Sediments". W Petrology, 277–97. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38800-2_13.
Pełny tekst źródłaSen, Gautam. "Sedimentary Rocks". W Petrology, 299–310. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38800-2_14.
Pełny tekst źródłaSen, Gautam. "Metamorphism and Metamorphic Rocks". W Petrology, 311–23. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38800-2_15.
Pełny tekst źródłaSen, Gautam. "Metamorphic Facies, Reactions, and P–T–t Paths". W Petrology, 325–50. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38800-2_16.
Pełny tekst źródłaSen, Gautam. "Erratum to: Petrology". W Petrology, E1. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38800-2_17.
Pełny tekst źródłaSen, Gautam. "Introduction to Igneous Rocks". W Petrology, 19–49. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013. http://dx.doi.org/10.1007/978-3-642-38800-2_2.
Pełny tekst źródłaStreszczenia konferencji na temat "Petrology"
Glazner, Allen F. "REBUILDING PETROLOGY FROM THE GROUND UP". W GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-308264.
Pełny tekst źródłaTaylor, Rich. "QUANTITATIVE GEOCHEMICAL MAPPING FOR PETROLOGY RESEARCH". W GSA Connects 2022 meeting in Denver, Colorado. Geological Society of America, 2022. http://dx.doi.org/10.1130/abs/2022am-382653.
Pełny tekst źródłaBingol, A. F., i M. Beyarslan. "Petrology of the Eastern Taurus Ophiolite (Turkey)". W 7th Congress of the Balkan Geophysical Society. Netherlands: EAGE Publications BV, 2013. http://dx.doi.org/10.3997/2214-4609.20131666.
Pełny tekst źródłaAdetunji, A. "PETROLOGY AND GEOCHRONOLOGY OF IWO POTASSIC SYENITE". W SGEM2011 11th International Multidisciplinary Scientific GeoConference and EXPO. Stef92 Technology, 2011. http://dx.doi.org/10.5593/sgem2011/s01.129.
Pełny tekst źródłaAgue, Jay J., Duncan S. Keller i E. M. Stewart. "CURRENT AND FUTURE CHALLENGES IN METAMORPHIC PETROLOGY". W GSA Annual Meeting in Phoenix, Arizona, USA - 2019. Geological Society of America, 2019. http://dx.doi.org/10.1130/abs/2019am-334593.
Pełny tekst źródłaMontero, Juan. "Colombian Petrology Classification of Aggregate Construction Materials". W GeoHunan International Conference 2011. Reston, VA: American Society of Civil Engineers, 2011. http://dx.doi.org/10.1061/47629(408)30.
Pełny tekst źródłaPurvis, Phillip, J. Lawford Anderson i Nilanjan Chatterjee. "PETROLOGY OF THE ROLLSTONE PEGMATITE, FITCHBURG, MA". W Joint 52nd Northeastern Annual Section and 51st North-Central Annual GSA Section Meeting - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017ne-291641.
Pełny tekst źródłaReichenbach, M. E., i C. F. Lamb. "Petrology: A Valuable Tool In Reservoir Evaluation". W Annual Technical Meeting. Petroleum Society of Canada, 1987. http://dx.doi.org/10.2118/87-38-70.
Pełny tekst źródłaRzeplinski, Igor, Chrystèle Sanloup, Denis Horlait i Eric Gilabert. "Xenon isotopic fractionation, an experimental petrology study". W Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.3747.
Pełny tekst źródłaMolendijk, Sander, Olivier Namur, Paul Mason, Benoît Smets, David Neave i Jacqueline Vander Auwera. "Petrology of the Nyiragongo volcano, DR Congo". W Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.6877.
Pełny tekst źródłaRaporty organizacyjne na temat "Petrology"
Nishiwaki-Nakajima, N. Global data base in sedimentary petrology. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1994. http://dx.doi.org/10.4095/193912.
Pełny tekst źródłaBurwash, R. A. Petrology of the northern Yukon intrusive suite. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1997. http://dx.doi.org/10.4095/208900.
Pełny tekst źródłaMerritt, R. D. Petrology of Cretaceous and Tertiary coals of southern Alaska. Alaska Division of Geological & Geophysical Surveys, 1986. http://dx.doi.org/10.14509/1255.
Pełny tekst źródłaPeterson, T. D., K. L. Currie, E. D. Ghent, N. J. Bégin i R E Beiersdorfer. Petrology and economic geology of the Crowsnest volcanics, Alberta. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1997. http://dx.doi.org/10.4095/209212.
Pełny tekst źródłaLentz, Rodney. The Petrology and Stratigraphy of the Portland Hills Silt. Portland State University Library, styczeń 2000. http://dx.doi.org/10.15760/etd.2452.
Pełny tekst źródłaJackson, James. Petrology of the Bull-of-the-Woods intrusive complex. Portland State University Library, styczeń 2000. http://dx.doi.org/10.15760/etd.2905.
Pełny tekst źródłaMadden, R. H. C., i R. D. Tilbury. Exploring for the Future: petrology of the Officer Basin. Geoscience Australia, 2022. http://dx.doi.org/10.11636/record.2022.035.
Pełny tekst źródłaRomick, J. D. The igneous petrology and geochemistry of northern Akutan Island, Alaska. Alaska Division of Geological & Geophysical Surveys, 1985. http://dx.doi.org/10.14509/1127.
Pełny tekst źródłaRomick, J. D. The igneous petrology and geochemistry of northern Akutan Island, Alaska. Alaska Division of Geological & Geophysical Surveys, 1986. http://dx.doi.org/10.14509/1227.
Pełny tekst źródłaHelmold, K. P., i R. G. Stanley. Petrology and reservoir quality of the Gaikema Sandstone: Initial impressions. Alaska Division of Geological & Geophysical Surveys, czerwiec 2015. http://dx.doi.org/10.14509/29462.
Pełny tekst źródła