Academic literature on the topic 'PBE+U'
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Journal articles on the topic "PBE+U"
Flores, Efracio Mamani, Rogério Almeida Gouvea, Maurício Jeomar Piotrowski, and Mário Lucio Moreira. "Band alignment and charge transfer predictions of ZnO/ZnX (X = S, Se or Te) interfaces applied to solar cells: a PBE+U theoretical study." Physical Chemistry Chemical Physics 20, no. 7 (2018): 4953–61. http://dx.doi.org/10.1039/c7cp08177d.
Full textFronzi, Marco, and Michael Nolan. "First-principles analysis of the stability of water on oxidised and reduced CuO(111) surfaces." RSC Advances 7, no. 89 (2017): 56721–31. http://dx.doi.org/10.1039/c7ra11854f.
Full textVanzan, Mirko, Margherita Marsili, and Stefano Corni. "Study of the Rate-Determining Step of Rh Catalyzed CO2 Reduction: Insight on the Hydrogen Assisted Molecular Dissociation." Catalysts 11, no. 5 (April 22, 2021): 538. http://dx.doi.org/10.3390/catal11050538.
Full textVela, Sergi, Maria Fumanal, Jordi Cirera, and Jordi Ribas-Arino. "Thermal spin crossover in Fe(ii) and Fe(iii). Accurate spin state energetics at the solid state." Physical Chemistry Chemical Physics 22, no. 9 (2020): 4938–45. http://dx.doi.org/10.1039/d0cp00162g.
Full textPan, Y., X. Y. Wei, F. M. Ji, Y. Zhu, D. N. Shi, and Z. Q. Yang. "Variation of exchange energy in δ-(Ga,Mn)As films under tensile strain: PBE and LDA+U calculations." RSC Advances 5, no. 108 (2015): 89139–43. http://dx.doi.org/10.1039/c5ra18564e.
Full textYang, Juntao, Yong Zhou, Qilin Guo, Yuriy Dedkov, and Elena Voloshina. "Electronic, magnetic and optical properties of MnPX3 (X = S, Se) monolayers with and without chalcogen defects: a first-principles study." RSC Advances 10, no. 2 (2020): 851–64. http://dx.doi.org/10.1039/c9ra09030d.
Full textVovusha, Hakkim, and Biplab Sanyal. "Adsorption of nucleobases on 2D transition-metal dichalcogenides and graphene sheet: a first principles density functional theory study." RSC Advances 5, no. 83 (2015): 67427–34. http://dx.doi.org/10.1039/c5ra14664j.
Full textJovanović, A., A. S. Dobrota, L. D. Rafailović, S. V. Mentus, I. A. Pašti, B. Johansson, and N. V. Skorodumova. "Structural and electronic properties of V2O5 and their tuning by doping with 3d elements – modelling using the DFT+U method and dispersion correction." Physical Chemistry Chemical Physics 20, no. 20 (2018): 13934–43. http://dx.doi.org/10.1039/c8cp00992a.
Full textCinthia, Arumainayagam Jemmy, Ratnavelu Rajeswarapalanichamy, and Kombiah Iyakutti. "First Principles Study of Electronic Structure, Magnetic, and Mechanical Properties of Transition Metal Monoxides TMO(TM=Co and Ni)." Zeitschrift für Naturforschung A 70, no. 10 (October 1, 2015): 797–804. http://dx.doi.org/10.1515/zna-2015-0216.
Full textNguyen, Manh-Thuong, Nicola Seriani, and Ralph Gebauer. "Water adsorption and dissociation on α-Fe2O3(0001): PBE+U calculations." Journal of Chemical Physics 138, no. 19 (May 21, 2013): 194709. http://dx.doi.org/10.1063/1.4804999.
Full textDissertations / Theses on the topic "PBE+U"
Freitas, Vivian Azor de. "A geração de magmas ácidos na Província Magmática Paraná, região de Piraju-Ourinhos (SP): uma contribuição da geoquímica isotópica e de elementos traço em rochas e minerais." Universidade de São Paulo, 2009. http://www.teses.usp.br/teses/disponiveis/44/44143/tde-08062009-153408/.
Full textDacitic rocks from Piraju-Ourinhos, State of São Paulo, outcrop for ca. 60 km along the Paranapanema River valley, and constitute the northernmost expositions of the Parana Magmatic Province acid magmatism. They rest directly over the Botucatu Formation eolic sandstones and are recovered by Pitanga-type high Ti basalt flows. Basalt dykes and sills that occur in the region show different chemical relationship and can be compared to the Paranapanema, Urubici and Pitanga basalt types. Chemically classified as trachydacites, these rocks are porphyritic with 5 to 15% plagioclase, clinopyroxene, opaque minerals and apatite phenocrysts. Aphanitic to phaneritic groundmass is composed of glass, plagioclase, clinopyroxene, quartz and alkali feldspar. Glass can make up 10 to 90% of the original groundmass and is usually devitrified, being recognized by relict quenching textures. Vesicles and amygdalas are abundants in such trachydacites varieties and can achieve to 40% of rock. In this work, the age of the acid magmatism was obtained by U-Pb TIMS in baddeleyite and zircon concentrates. The value [134.4 0,9 (2\'sigma\')], is more accurate and precise compared with ages previously obtained in the trachydacites from region [133 -134 ± 6 Ma (K-Ar); 128.7 ± 1 Ma (\'ANTPOT.40 Ar\'/\'39 ANTPOT.Ar\')], and within the short age interval currently admitted for the Paraná volcanism climax. Initial \'ANTPOT.87 Sr\'/\' ANTPOT.86 Sr\' ratios of the trachydacites (0.7078 to 0.7080) are slightly more radiogenic than those of associated basalts (0.7056 to 0.7068), whereas \'épsilon\'\'Nd IND.134\' are more negative (~ -5 versus -4). These differences suggest that, although the basalts must have a genetic link with the acid magmatism of region, some crustal contribution may exist in the acid magmas. Initial \'ANTPOT.87 Sr\'/\'ANTPOT.86 Sr\' obtained by LA-ICPMS show identical values for the groundmass and plagioclase and apatite phenocrysts (~0.7077), consistent with equilibrium crystallization. Most of the clinopyroxene phenocrysts have initial \'ANTPOT.87 Sr\'/\'ANTPOT.86 Sr\' different from the groundmass (usually smaller; 0.7045-0.7071; only one crystal is more radiogenic, 0.7084). Together with two the plagioclase phenocrysts (with initial \'ANTPOT.87 Sr\'/\'ANTPOT.86 Sr\'= 0.7083 and 0.7074), they did not crystallize in equilibrium to the groundmass, and are likely antecrysts. Geochemical modelling using major elements and both compatible and incompatible trace-elements show that it is possible to obtain the acid magmas after 60 to 80% fractional crystalization of a Pitanga-type basalt. The main obstacle for such model would be the wide compositional silic gap between acid and basic magmas.; however, this gap could result from physical limitations to crystal-liquid separation at intermediate compositions and to the extraction by filter pressing of more evolved residual liquids. The small differences in Sr-Nd isotopic signature between acid and basic rocks can be explained by an AFC model, with 60% of basaltic magma crystalization plus ~10-30% assimilation of a granitic liquid derived from the pre- Cambrian basament. On the other hand, a model of remelting of basalt underplates generates acid magmas with higher contents of compatible elements contents (Ni, Cr, V) and therefore would demand some fractionation to achieve the observed trachydacite compositions.
Godeau, Nicolas. "Développement et application de la méthode Uranium-Plomb à la datation des carbonates diagénétiques dans les réservoirs pétroliers, et apport à la reconstruction temporelle de l'évolution des propriétés réservoir." Thesis, Aix-Marseille, 2018. http://www.theses.fr/2018AIXM0149.
Full textAbsolute chronological constraints on the different events and processes that have shaped the Earth constitute a major challenge in numerous realms in Earth and Environmental sciences. In particular this is the case for sedimentary basins that play a major economic role as being source of important hydrocarbon resources. The objective of this thesis is to develop absolute uranium-lead dating methodology on secondary carbonate minerals. This ubiquitous mineral phase in petroleum reservoirs testifies their complex geodynamic and diagenetic histories. In this study, several developments were implemented in order to circumvent the limits of U-Pb methodology. Innovative analysis techniques such as laser ablation coupled with SF-ICP-MS or ion probe were tested to increase the spatial resolution of the U-Pb analysis by several orders of magnitude. These methodologies coupled to the more traditional isotope dilution was successfully applied in different oil exploration context allowing to bring absolute constraints on key diagenetic events such as creation/preservation of reservoir properties or hydrocarbon migration. The results obtained during this study allowed to draw a synthetic model of the most favorable contexts for U-Pb method and gives an overview of the U-Pb dating potential to secondary carbonates applied to petroleum reservoirs
Gengo, Rafaela Machado. "Petrologia de ortognaisses e granitóides do Domínio Socorro, Nappe Socorro-Guaxupé, Seção Extrema-Camanducaia." Universidade de São Paulo, 2014. http://www.teses.usp.br/teses/disponiveis/44/44143/tde-03122014-095629/.
Full textThe Socorro - Guaxupé Nappe represents an ancient magmactic arc formed during the collisional phase of the Southern Brasília Orogen), one of the important Neoproterozoic orogenic events, responsible for the agglutination of the western portion of Gondwana paleo continent. In the southeastern portion of the Socorro Domain, many NE-SW shear zones controlled the intrusion of many bodies and batholiths of potássic calc-alkaline granitoids, generated by sin-orogenic crustal melting of the nappe in a shallow-depth, high-temperature environment, during the metamorphic peak. The orthogneisses and migmatites that crop out in the area are not related to the stromatic pelitic to semi-pelitic migmatites that are predominant in the nappe\'s Metatexitic Unit. So far, these rocks were considerated to be part of the Amparo Complex, which is the basement of the Socorro Granitoid Complex. This work present new geochemical, isotopic and geochronological data for rocks from the region between Extrema and Camanducaia, southern Minas Gerais, which allow the characterization of the magmatism that originated those orthogneisses and its crustal evolution, and also the determination of its age in the Neoproterozoic context of the Socorro-Guaxupé Nappe. U-Pb zircon ages obtained from dioritic paleossome of the metatexitic orthogneisses provided ages of 662,1 ± 5,1 My. Sporadic older ages from 770 to 834 My were found only in inherited cores. On dioritic to granodioritic orthogneiss where partial melting processes were not started, zircon crystals from an orthogneiss of dioritic composition provided 660 to 630 My U-Pb ages, implying an active Neoproterozoic magmatism during the pre- to sin-collisional period of the Socorro-Guaxupé Nappe, in a static magmatic arc environment for ate least 30 My, which is a condition similar to the present-day Japan\'s magmatic arc occurrence. The magmatism which originated the dioritic to granodioritic orthogneisses has affinities with the high-K calc-alkaline series and geochemical and isotopic characteristics similar to I-Type granites. \'ANTPOT.87 Sr\'/ \'ANTPOT.86 \'Sr IND.i\' rates and negative \'épsilon\'Nd values point to a crustal source depleted in incompatible elements. At the tardi- to post- collisional phase of the nappe, during the period from 609 to 598 My, the last pulses of dioritic magmatism gave place to a monzodioritic and monzonitic magmatism which resulted in the intrusion of many rock bodies with an A-Type geochemical signature similar to the post-collisional Piracaia Pluton, part of which exhibit magma interaction and magma mixing features.
Triantafyllou, Antoine. "Évolution géodynamique d’un arc insulaire néoprotérozoïque de l’Anti -Atlas marocain : caractérisation des processus de croissance intra-océanique et d’accrétion." Thesis, Nantes, 2016. http://www.theses.fr/2016NANT4031/document.
Full textRelics of an intra-oceanic arc system are exposed in the Anti-Atlas in southern Morocco, in the Sirwa and Bou Azzer windows. Both of these areas form a highly tectonized patchwork made of a back-arc ophiolitic sequence to the north thrusted onto accreted arc complexes to the south. These arc complexes (Tachakoucht, Tazigzaout and Bougmane complexes) are made of granodioritic gneisses and amphibolites with typical oceanic arc signature and for which igneous ages range from 750 to 730 Ma. These magmas were buried, deformed and metamorphosed under MP-MT conditions in Tachakoucht (700°C - 8kbar) and HP-MT in Bougmane (750°C - 10 kbar) prior to several magmatic events dated at 700 and 650 Ma and the intrusion of hydrous basic magmas (hornblende gabbros, hornblendites) with oceanic arc signatures. This episodic magmatism strongly perturbed the thermal regime of the arc leading to the granulitization of the host rocks at different levels of the arc crust and to the genesis of intermediate to felsic magmas (granodioritic to granitic). These ones have been segregated through the crustal section intruding both stacked paleo-arc and ophiolitic remnants. This field, petrological, geochemical and geochronological study established that oceanic arc magmatism in the Anti-Atlas occurred in three flare-ups on a 120 Ma long time span (760 to 640 Ma). The growth of the arc was controlled and driven both by successive magmatic inputs and intra-oceanic tectonic thickening processes while final collision of the intraoceanic system with the West African Carton occurred later, around 630-600 Ma
SANTOS, Lucilene dos. "Caracterização petrológica e geoquímica dos granitoides intrudidos ao longo da zona de cisalhamento Coxixola, Província Borborema, NE Brasil: plutons Serra Branca e Coxixola." Universidade Federal de Pernambuco, 2013. https://repositorio.ufpe.br/handle/123456789/10434.
Full textMade available in DSpace on 2015-03-04T17:34:48Z (GMT). No. of bitstreams: 2 DISSERTAÇÃO Lucilene dos Santos.pdf: 10057943 bytes, checksum: 487d4e94f2325e876643a0f22bf56873 (MD5) license_rdf: 1232 bytes, checksum: 66e71c371cc565284e70f40736c94386 (MD5) Previous issue date: 2013-07-26
CNPq
Os granitoides estudados (plutons Serra Branca - GPSB e Coxixola - GPC) intrudem ortognaisses e migmatitos paleoproterozóicos a arqueanos, e rochas supracrustais Neoproterozóicas. Os GPSB, sienogranitos leucocráticos, equigranulares, contendo localmente enclaves de granitos porfiríticos (GPC) e dioritos, compreendem intrusão alojada em terminações extensionais de zonas de cisalhamento NE-SW transcorrentes sinistrais, ramificações da zona de cisalhamento Coxixola (ZCC), destral com direção E-W. Os GPC compreendem quartzo sienitos, quartzo monzonitos e sieno a monzogranitos, porfiríticos, deformados no estado sólido, com anfibólio de composição ferro - edenita, edenita e Mg - hornblenda. Enxames de enclaves máficos, quartzo dioritos a quartzo monzonitos, ocorrem orientados na direção E - W. A fO2 varia de intermediária (GPSB) a elevada (GPC). Estimativas de temperaturas liquidus utilizando saturação em zircão, variam entre 836 °C - 893 °C (GPC) e 783 °C - 843 °C (GPSB). Os granitoides estudados mostram valores fortemente negativos de εNd(t) e idades modelo (TDM) paleoproterozóicas. U-Pb em zircão por SHRIMP definiu uma idade de 560 ± 5 Ma para os GPSB, e por LA-ICP-MS definem idades de 573 ± 3 Ma para um dique de leucogranito que corta os GPC e de 580 ± 7 Ma para os GPC. Os GPSB são ricos em SiO2 (> 70%), levemente peraluminosos, com padrões ETR fracionados, mostrando profundas anomalias negativa de Eu, e padrões Spidergram com depressões em Nb, Ta, Sr, P e Ti. São classificados como granitoides trans-alcalinos ferrosos, tipo-A pós-orogênico. Os GPC mostram teores intermediários de SiO2 de 55-67 %, são metaluminosos, magnesianos, tipo-I mostrando padrões de ETR fracionados e caracterizados pela ausência ou anomalias fracamente positivas de Eu, e padrões Spidergram com depressões em Th, Nb, Ta, Ti. Assinaturas isotópicas e geoquímicas sugerem que os granitoides estudados foram originados pela mistura de magmas gerados pela fusão de crosta paleoproterozóica ou arqueana e pequena fração de material Neoproterozóico em diferentes épocas da história evolutiva da ZCC.
Neace, Erika R. "Zircon LA-ICPMS Geochronology of the Cornubian Batholith, SW England." Ohio University / OhioLINK, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1448912006.
Full textLena, Luís Otávio Fortes de. "A evolução do arco magmático neoproterozóico São Gabriel, porção sul da província Mantiqueira, baseado em idades U-Pb SHRIMP e LA-ICP-MS e valores de δ18O em zircões detríticos." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2013. http://hdl.handle.net/10183/72227.
Full textThe São Gabriel Magmatic Arc (SGA) is a juvenile terrane exposed in the western part of the Dom Feliciano Belt (DFB) in the southern part of the Mantiqueira Province, southern Brazil. Here we present the results of combined SHRIMP and LA-ICP-MS U-Pb geochronology of 177 detrital zircons from the meta-sedimentary rocks of the Cambaizinho Complex (CC). Eighty-one grains were later selected for SHRIMP-II δ18O analysis. Ages ranged from 840 to 660 Ma, with a strong concentration between ca. 750 and 700 Ma. The age spectrum of the detrital zircon grains from this meta-sedimentary succession suggests that the original sediments were derived from the erosion of the São Gabriel Arc itself, most likely in a fore-arc basin. Th/U ratios and internal structures of the zircon grains reveal that they were mostly eroded from magmatic rocks in the arc, without any relevant contribution from their metamorphic counterparts, or from any other older source. The δ18O values varied from 3.2 to 9.6%o, and most of them indicate derivation from juvenile, mantle-derived magmas. Three distinct age groups are recognized: (i) ca. 840-750 Ma for which δ18O values varied between 3.2 to 5.5 %o suggesting a mantle-derived source, without any continental contribution, (ii) 750-700 Ma, with δ18O values ranging from 4.0 to 9.4 %o; this period is regarded as the peak of magmatism within the arc, in this case both mantle and continental derived Neoproterozoic rocks played an important role on sediment supply, (iii) 690- 660 Ma, for which δ18O values ranged between 6.0 and 9.4 %o. In this time period, continentalderived rocks are the main source of sediments; no mantle δ18O values are observed. Therefore, our data provides an insight into the progressive evolution of the SGA from an intra-oceanic subduction zone at ca. 840-750 Ma to a continental arc setting (ages < 690 Ma), which preceded ocean closure and continental collision at the end of the Neoproterozoic.
Souza, Sheila Fabiana Marcelino de. "Geocronologia U-Pb SHRIMP no Complexo Mantiqueira na região entre Juiz de Fora e Santos Dumont, sudeste de Minas Gerais." Universidade do Estado do Rio de Janeiro, 2008. http://www.bdtd.uerj.br/tde_busca/arquivo.php?codArquivo=8689.
Full textO Orógeno Ribeira representa um cinturão de dobramentos e empurrões, gerado no Neoproterozóico/Cambriano, durante a Orogênese Brasiliana, na borda sul/sudeste do Cráton do São Francisco e compreende quatro terrenos tectono-estratigráficos: 1) o Terreno Ocidental, interpretado como resultado do retrabalhamento do paleocontinente São Francisco, é constituído de duas escamas de empurrão de escala crustal (Domínios Andrelândia e Juiz de Fora); 2) o Terreno Oriental representa uma outra microplaca e abriga o Arco Magmático Rio Negro; 3) o Terreno Paraíba do Sul, que constitui-se na escama superior deste segmento da faixa; e 4) o Terreno Cabo Frio, cuja docagem foi tardia, ocupa pequena área no litoral norte do estado do Rio de Janeiro. Em todos os diferentes compartimentos do segmento central da Faixa Ribeira podem ser identificadas três unidades tectono-estratigráficas: 1) unidades pré-1,8 Ga. (ortognaisses e ortogranulitos do embasamento); 2) rochas metassedimentares pós-1,8 Ga; e 3) granitóides/charnockitóides brasilianos. O Complexo Mantiqueira é composto por ortognaisses migmatíticos, tonalíticos a graníticos, e anfibolitos associados, constitui o embasamento pré-1,8 Ga das rochas da Megasseqüência Andrelândia no domínio homônimo do Terreno Ocidental. Foram integrados 68 dados litogeoquímicos dentre ortognaisses e metabasitos do Complexo Mantiqueira. As rochas dessa unidade pertencem a duas séries distintas: série calcioalcalina (rochas intermediárias a ácidas); e série transicional (rochas básicas, ora de afinidade toleítica, ora alcalina). Com base em critérios petrológicos, análise quantitativa e em valores [La/Yb]N, verificou-se que o Complexo Mantiqueira é bastante heterogêneo, incluindo diversos grupos petrogeneticamente distintos. Dentre as rochas da série transicional, foram identificados 2 conjuntos: 1) rochas basálticas toleiíticas, com [La/Yb]N entre 2,13 e 4,72 (fontes do tipo E-MORB e/ou intraplaca);e 2) rochas basálticas de afinidade alcalina, com [La/Yb]N entre 11,79 e 22,78. As rochas da série calciolacalina foram agrupadas em cinco diferentes conjuntos: 1) ortognaisses migmatíticos quartzo dioríticos a tonalíticos, com [La/Yb]N entre 11,37 e 38,26; 2) ortognaisses bandados de composição quarzto diorítica a granodiorítica, com [La/Yb]N entre 4,35 e 9,28; 3) ortognaisses homogênos de composição tonalítica a granítica, com [La/Yb]N entre 16,57 e 38,59; 4) leucognaisses brancos de composição tonalítica/trondhjemítica a granítica, com [La/Yb]N entre 46,69 e 65,06; e 5) ortognaisse róseo porfiroclástico de composição tonalítica a granítica, com [La/Yb]N entre 82,70 e 171,36. As análises geocronológicas U-Pb SHRIMP foram realizadas no Research School of Earth Science (ANU/Canberra/Austrália). Foram obtidas idades paleoproterozóicas para as rochas das duas séries identificadas, interpretadas como a idade de cristalização dos protólitos magmáticos desses gnaisses e metabasitos. Os resultados obtidos mostram uma variação de idades de cristalização de 2139 35 a 2143,4 9,4, para as rochas da série transicional, e de 2126,4 8 a 2204,5 6,7, para aquelas da série calcioalcalina. Dentre todas as amostras estudadas, apenas a amostra JF-CM-516IV forneceu dados discordantes de idades arqueanas (292916 Ma), interpretados como dados de herança. Contudo, evidências dessa herança semelhantes a esta são observadas em outras amostras. Ambas as séries também apresentaram idades de metamorfismo neoproterozóico, no intervalo de 548 17 Ma a 590,5 7,7 Ma que é consistente com o metamorfismo M1 (entre 550 e 590 Ma), contemporâneo à colisão entre os Terrenos Ocidental e Oriental do setor central da Faixa Ribeira (Heilbron, 1993 e Heilbron et al., 1995).
The Ribeira Orogen is a complex orogenic belt developed during the Brasiliano Orogeny, along the southern and southeastern borders of the São Francisco Craton, and is subdivided into four tectono-stratigraphic terranes: 1) the Occidental Terrane, taken as the reworked margin of São Francisco paleocontinent, displays an internal tectonic organization with two crustal scale thrust sheets (Andrelândia and Juiz de Fora); 2) the Oriental Terrane, comprises another crotonic block or microplate and includes the Rio Negro magmatic arc; 3) the Paraíba do Sul Terrane, which comprises the uppermost thrust slice of the central segment of the belt; and 4) the Cabo Frio Terrane, which occupies a restrict area at the coast of Rio de Janeiro State, records a late docking event. Within all the forementioned terranes, it can be identified three litho-tectonic units: pre-1.8 Ga basement units (orthognaisses and orthogranulites); 2) post-1.8 Ga supracrustal rocks; and 3) brasiliano granitoids and charnockitoids. Mantiqueira Complex comprises a great variety of tonalitic to granitic orthogneisses and minor orthoamphibolites. This unit comprises the basement rocks of the Andrelândia Megasequence within the Andrelândia tectonic domain. Lithogeochemical data of 68 samples, including orthogneisses and metabasites, indicate that the Mantiqueira Complex comprises two different series: calcalkaline series (intermediate to acid calcalkaline rocks); and transicional series (alkaline to tholeiitic basic rocks). Based on petrological criteria, quantitative analysis and [La/Yb]N values, it was possible to verify that the Mantiqueira Complex is heterogeneous and includes many petrogenetic groups. The transicional series comprises two groups: 1) tholeitic basic rocks, with [La/Yb]N between 2,13 and 4,72 (E-MORB and/or Intraplate type); and 2) alkaline basic rocks, with [La/Yb]N between 11,79 and 22,78. The calcalkaline rocks of the Mantiqueira Complex may be grouped into five different petrogenetic groups: 1) migmatitic quartz dioritic to tonalitic orthogneisses, with [La/Yb]N between 11,37 and 38,26; 2) banded quartz dioritic to granodioritic orthogneisses, with [La/Yb]N between 4,35 and 9,28; 3) tonalitic to granitic homogeneous orthogneisses, with [La/Yb]N between 16,57 and 38,59; 4) white tonalitic/trondhjemitic to granitic leucogneisses, with [La/Yb]N between 46,69 and 65,06; and 5) pinkish orthogneiss of tonalitic to granitic composition and [La/Yb]N between 82,70 and 171,36. U-Pb SHRIMP geocronological analysis were performed at the Research School of Earth Science (ANU/Canberra/Australia). Paleoproterozoic ages, interpreted as protoliths cristalization ages, were obtained for rocks from both the calcalkaline and transitional series. Obtained results display a range of cristalization ages from 2139 35 to 2143,4 9,4, to the rocks of the transitional series, and from 2126,4 8 to 2204,5 6,7, for those of the calcalkaline one. Among all studied rocks, only one (sample JF-CM-516 IV) yielded discordant archean zircons (292916 Ma), interpreted as inherited ones. However, evidences of archean zircons were obtained from zircons of other samples. All studied samples record a neoproterozoic metamorphic event in the interval from 548 17 Ma to 590,5 7,7 Ma, which is consistent with the M1 metamorphic event (from 550 to 590 Ma), contemporaneous to the main collision of the central segment of Ribeira Belt (collision between the Occidental and Oriental Terranes (Heilbron, 1993 e Heilbron et al., 1995).
Mangenot, Xavier. "Contributions du thermomètre Δ47 et du chronomètre U-Pb à l’étude de l’histoire diagénétique, thermique, et hydrogéologique des réservoirs carbonatés du Jurassique Moyen du bassin de Paris." Thesis, Sorbonne Paris Cité, 2017. http://www.theses.fr/2017USPCC276/document.
Full textDiagenesis studies of both siliciclastic and carbonate rock units face the difficulty of constraining the temperature and age of the successive episodes of mineral crystallization. The first objective of this PhD work was to test the potential of two recent isotopic tools (the "clumped isotopes" Æ47 geothermometer and the laser ablation U-Pb geochronometer ) to integrate conventional carbonate diagenesis studies. The second objective was to reconstruct the diagenetic, thermal, and hydrogeological histories of the Middle Jurassic carbonate reservoirs of the Paris Basin. To achieve these goals, we studied calcite and dolomite cements mostly collected in the basin subsurface (exploration cores). The good petrographical and sedimentological characterization of the studied samples, together with the analysis of fluid inclusions and ?47 thermometry for determining the temperature and the chemical and isotopic compositions of the mineralizing fluids, allowed us to reach several first-order information. First, we show that Æ47 allows to simultaneously and precisely reconstruct the formation temperature of diagenetic cements in the range 60-100 ¡C (with an accuracy of ~ 3-5 ¡C) and the oxygen isotopic composition of the parent fluids (d18Owater) with a precision of ~ 1 ä. Secondly, this work improves our knowledge on the thermal history and past fluid-flows occurring at the basin scale. In particular, the coupling of the Æ47 thermometer with the U-Pb chronometer permitted for the first time to set absolute thermo-chronological constraints on every fluid-flow episodes investigated. More broadly, this unprecedented Æ47/(U-Pb) coupling reveals a new field of application in the low-temperature thermo-chronology field (10-100 ¡C). We anticipate that this pioneer thermo-chronological approach will induce many future applications in the study of sedimentary basins via carbonate diagenesis studies
Valencia, Federico Arturo. "Whole-Rock Lead-Lead Systematics and Major Element Analyses on the 1.85 GA. FLIN FLON Paleosol, Manitoba, Canada: Implications for Uranium Mobility." Digital Archive @ GSU, 2011. http://digitalarchive.gsu.edu/geosciences_theses/40.
Full textBooks on the topic "PBE+U"
Petrovich, Shcherbak Nikolaĭ, ed. Mineralʹnye U-Pb vozrasty dokembrii͡a vostochnoĭ chasti Baltiĭskogo shchita. Leningrad: Izd-vo "Nauka," Leningradskoe otd-nie, 1987.
Find full textGuerrot, C. Archéen et protérozoïque dans la chaîne hercynienne ouest-européenne: Géochimie isotopique (Sr-Nd-Pb) et géochronologie U-Pb sur zircons. Rennes, France: Editions du C.A.E.S.S., Université de Rennes I, 1989.
Find full textTeufel, Stephan. Vergelichende U-Pb- und Rb-Sr-Alterbestimmungen an Gesteinen des Ubergangsbereiches Saxthuringikum/Moldanubikum,NE-Bayern. Gottingen: Im Selbstverlag der Geologischen Inst.der Georg-August-Univ., 1988.
Find full textToth, Margo I. Constraints on the formation of the Bitterroot lobe of the Idaho Batholith, Idaho and Montana, from U-Pb zircon geochronology and feldspar Pb isotopic data. Washington, DC: U.S. G.P.O., 1992.
Find full textHolliger, Philippe. The new OKLO reaction zones: U-Pb dating and in situ characterization of fission products by ion analysis : report on Progress 1991. Grenoble: Centre d'Études Nucléaires de Grenoble, 1993.
Find full textSurvey, Ontario Geological. Geochronology Compilation Map For Ontario : Sheet 2: Southern Ontario: Grenville : Province and Environs : rb-sr, nd-sm, U-pb, and Other Isotopic Systems. S.l: s.n, 1986.
Find full textCochrane, Ryan. U-Pb thermochronology, geochronology and geochemistry of NW South America: Rift to drift transition, active margin dynamics and implications for the volume balance of continents. Genève: Département de Minéralogie, Université de Genève, 2013.
Find full textRobb, L. J. U-Pb ages on single detrital zircon grains from the Witwatersrand Basin: Constraints on the age of sedimentation and on the evolution of granites adjacent to the depository. Johannesburg: University of the Witwatersrand, 1989.
Find full textRobb, L. J. U-Pb ages on single detrital zircon grains from the Witwatersrand Basin: Constraints on the age of sedimentation and on the evolution of granites adjacent to the depository. Johannesburg: University of the Witwatersrand, 1989.
Find full textBook chapters on the topic "PBE+U"
Amelin, Yuri. "Meteorites (U–Pb)." In Encyclopedia of Scientific Dating Methods, 1–6. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-6326-5_111-1.
Full textAmelin, Yuri. "Meteorites (U–Pb)." In Encyclopedia of Marine Geosciences, 559–62. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-007-6304-3_111.
Full textGetty, Stephen R., and Donald J. Depaolo. "U-Pb and Th-Pb Geochronology in Quaternary Rocks." In AGU Reference Shelf, 121–29. Washington, D. C.: American Geophysical Union, 2013. http://dx.doi.org/10.1029/rf004p0121.
Full textVillars, P., K. Cenzual, J. Daams, R. Gladyshevskii, O. Shcherban, V. Dubenskyy, V. Kuprysyuk, and I. Savysyuk. "(Sr,Pb)(Y,U)(Ti,Fe)20O38." In Structure Types. Part 9: Space Groups (148) R-3 - (141) I41/amd, 82. Berlin, Heidelberg: Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-642-02702-4_44.
Full textHarrison, T. Mark, Elizabeth J. Catlos, and Jean-Marc Montel. "14. U-Th-Pb Dating of Phosphate Minerals." In Phosphates, edited by Matthew J. Kohn, John Rakovan, and John M. Hughes, 523–58. Berlin, Boston: De Gruyter, 2002. http://dx.doi.org/10.1515/9781501509636-017.
Full textSu, Ben-Xun. "Zircon U–Pb Geochronlogy and Hf–O Isotopes." In Mafic-ultramafic Intrusions in Beishan and Eastern Tianshan at Southern CAOB: Petrogenesis, Mineralization and Tectonic Implication, 69–106. Berlin, Heidelberg: Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-54262-6_5.
Full textSuzuki, Kazuhiro, and Daniel J. Dunkley. "Uranium-Lead, Chemical Isochron U-Pb Method (CHIME)." In Encyclopedia of Scientific Dating Methods, 1–9. Dordrecht: Springer Netherlands, 2014. http://dx.doi.org/10.1007/978-94-007-6326-5_200-1.
Full textSuzuki, Kazuhiro, and Daniel J. Dunkley. "Uranium–Lead, Chemical Isochron U–Pb Method (CHIME)." In Encyclopedia of Scientific Dating Methods, 863–69. Dordrecht: Springer Netherlands, 2015. http://dx.doi.org/10.1007/978-94-007-6304-3_200.
Full textTolosana-Delgado, R., K. G. van den Boogaart, E. Fišerová, K. Hron, and I. Dunkl. "Joint Compositional Calibration: An Example for U–Pb Geochronology." In Springer Proceedings in Mathematics & Statistics, 181–209. Cham: Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-44811-4_12.
Full textCocherie, Alain, and Michèle Robert. "LA-MC-ICP-MS Applied to U-PB Zircon Geochronology." In Mass Spectrometry Handbook, 675–705. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2012. http://dx.doi.org/10.1002/9781118180730.ch31.
Full textConference papers on the topic "PBE+U"
Smye, Andrew. "Applications and Limitations of U-Pb Thermochronology." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.2417.
Full textSundell, Kurt E., and Joel E. Saylor. "UNMIXING DETRITAL ZIRCON U-PB AGE DISTRIBUTIONS." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-305507.
Full textSmye, Andrew J. "APPLICATIONS AND LIMITATIONS OF U-PB THERMOCHRONOLOGY." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-302498.
Full textKelly, Nigel M., James R. Metcalf, Rebecca M. Flowers, and Stephen Mojzsis. "NEW INFORMATION FROM OLD LUNAR ZIRCON – INTEGRATING U-PB AND (U-TH)/HE CHRONOMETRY." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-306661.
Full textNeymark, Leonid, Richard Moscati, Anatoly Larin, and John Slack. "How Robust is the Cassiterite U-Pb Geochronometer?" In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.1917.
Full textHe, Sheng, Dongfa Guo, Jianyong Cui, Ruiping Liu, and Zengwei Fan. "Possible High U Effect on Secondary Ion Mass Spectrometry (SIMS) of Cassiterite U-Pb Dating." In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.996.
Full textMcKay, Matthew, Will Jackson, Adelie Ionescu, and Derek Spurgeon. "DETRITAL ZIRCON U-PB AND TH/U COUPLED WITH ZIRCON (U-TH)/HE REVEALS NEOACADIAN UPLIFT IN THE APPALACHIAN VALLEY AND RIDGE." In Southeastern Section-70th Annual Meeting-2021. Geological Society of America, 2021. http://dx.doi.org/10.1130/abs/2021se-362356.
Full textStephens, Travis Scott, Chad J. Pritchard, and Paul O’Sullivan. "U-PB GEOCHRONOLOGY OF SILVER HILL, SPOKANE COUNTY, WASHINGTON." In GSA Annual Meeting in Seattle, Washington, USA - 2017. Geological Society of America, 2017. http://dx.doi.org/10.1130/abs/2017am-298572.
Full textMcGuire, Preston R., Xiangyang Xie, and William D. Hanson. "U-PB DETRITAL ZIRCON SIGNATURE OF THE OUACHITA OROGENIC BELT." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-278990.
Full textSuarez, Stephanie Elaine, Michael Brookfield, E. J. Catlos, and Daniel F. Stockli. "U-PB AGE OF THE OLDEST AIR-BREATHING LAND ANIMAL." In GSA Annual Meeting in Denver, Colorado, USA - 2016. Geological Society of America, 2016. http://dx.doi.org/10.1130/abs/2016am-283259.
Full textReports on the topic "PBE+U"
Parrish, R. R., and J. W. H. Monger. New U - Pb Dates From southwestern British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1992. http://dx.doi.org/10.4095/132915.
Full textParrish, R. R. Miscellaneous U - Pb Zircon Dates From Southeast British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1992. http://dx.doi.org/10.4095/132919.
Full textFredenburg, David A., Dana Mcgraw Dattelbaum, and Darcie Dennis-Koller. (U) Analysis of shock-initiated PBX-9501 through porous CeO2. Office of Scientific and Technical Information (OSTI), July 2015. http://dx.doi.org/10.2172/1210219.
Full textBickerton, L., D. J. Kontak, I. M. Samson, J. B. Murphy, and D A Kellett. U-Pb geochronology of the South Mountain Batholith, Nova Scotia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 2018. http://dx.doi.org/10.4095/306421.
Full textDavidson, A., and O. van Breemen. U-Pb ages of granites near the Grenville Front, Ontario. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1994. http://dx.doi.org/10.4095/195176.
Full textBevier, M. L., and J. B. Whalen. U-Pb geochronology of Silurian granites, Miramichi Terrane, New Brunswick. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1990. http://dx.doi.org/10.4095/129075.
Full textMonger, J. W. H., and V. J. McNicoll. New U-Pb dates from southwestern Coast Belt, British Columbia. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1993. http://dx.doi.org/10.4095/193341.
Full textTuzzolino, A. L., P. B. O'Sullivan, L. K. Freeman, and R. J. Newberry. Zircon U-Pb age data, Ray Mountains area, Bettles Quadrangle, Alaska. Alaska Division of Geological & Geophysical Surveys, May 2016. http://dx.doi.org/10.14509/29662.
Full textJones, S. L., J. R. Anderson, G. L. Fraser, C. J. Lewis, and S. M. McLennan. A U-Pb Geochronology Compilation for Northern Australia: Version 2, 2018. Geoscience Australia, 2018. http://dx.doi.org/10.11636/record.2018.049.
Full textMortensen, J. K., R. I. Thorpe, W. A. Padgham, J. E. King, and W J Davis. U-Pb zircon ages for felsic volcanism in Slave Porvince, N.W.T. Natural Resources Canada/ESS/Scientific and Technical Publishing Services, 1988. http://dx.doi.org/10.4095/126606.
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