Bibliografias temáticas / Icp-Ms / mc-Icp-Ms

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Literatura científica selecionada sobre o tema "Icp-Ms / mc-Icp-Ms"

Autor: Grafiati

Publicado: 29 de março de 2025

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Artigos de revistas sobre o assunto "Icp-Ms / mc-Icp-Ms"

Zhang, Wen, Zhaochu Hu e Yongsheng Liu. "Iso-Compass: new freeware software for isotopic data reduction of LA-MC-ICP-MS". Journal of Analytical Atomic Spectrometry 35, n.º 6 (2020): 1087–96. http://dx.doi.org/10.1039/d0ja00084a.

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Santamaria-Fernandez, Rebeca, Ruth Hearn e Jean-Claude Wolff. "Detection of counterfeit tablets of an antiviral drug using δ34S measurements by MC-ICP-MS and confirmation by LA-MC-ICP-MS and HPLC-MC-ICP-MS". Journal of Analytical Atomic Spectrometry 23, n.º 9 (2008): 1294. http://dx.doi.org/10.1039/b802890g.

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Hanousek, Ondrej, Marion Brunner, Daniel Pröfrock, Johanna Irrgeher e Thomas Prohaska. "The performance of single and multi-collector ICP-MS instruments for fast and reliable34S/32S isotope ratio measurements". Analytical Methods 8, n.º 42 (2016): 7661–72. http://dx.doi.org/10.1039/c6ay02177h.

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The performance and validation characteristics of different single collector inductively coupled plasma mass spectrometers based on different technical principles (ICP-SFMS, ICP-QMS in reaction and collision modes, and ICP-MS/MS) were evaluated in comparison to the performance of MC ICP-MS for fast and reliable S isotope ratio measurements.

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Wu, Fei, Yuhan Qi, Huimin Yu, Shengyu Tian, Zhenhui Hou e Fang Huang. "Vanadium isotope measurement by MC-ICP-MS". Chemical Geology 421 (fevereiro de 2016): 17–25. http://dx.doi.org/10.1016/j.chemgeo.2015.11.027.

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Malinovsky, D., P. J. H. Dunn e H. Goenaga-Infante. "Calibration of boron isotope ratio measurements by MC-ICP-MS using normalisation to admixed internal standards". Journal of Analytical Atomic Spectrometry 35, n.º 11 (2020): 2723–31. http://dx.doi.org/10.1039/d0ja00145g.

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Xie, Lie-Wen, Noreen J. Evans, Yue-Heng Yang, Chao Huang e Jin-Hui Yang. "U–Th–Pb geochronology and simultaneous analysis of multiple isotope systems in geological samples by LA-MC-ICP-MS". Journal of Analytical Atomic Spectrometry 33, n.º 10 (2018): 1600–1615. http://dx.doi.org/10.1039/c8ja00157j.

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This is a critical review that: (i) provides an overview of LA-MC-ICP-MS dating techniques; (ii) highlights the benefits of using ICs and summarizes recent improvements in ultra-high spatial resolution dating; (iii) summarizes the range of minerals utilized for LA-MC-ICP-MS geochronology and LASS.

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Kaufmann, A. B., M. Lazarov, S. Kiefer, J. Majzlan e S. Weyer. "In situ determination of antimony isotope ratios in Sb minerals by femtosecond LA-MC-ICP-MS". Journal of Analytical Atomic Spectrometry 36, n.º 7 (2021): 1554–67. http://dx.doi.org/10.1039/d1ja00089f.

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Weyrauch, Mona, Martin Oeser, Annika Brüske e Stefan Weyer. "In situ high-precision Ni isotope analysis of metals by femtosecond-LA-MC-ICP-MS". Journal of Analytical Atomic Spectrometry 32, n.º 7 (2017): 1312–19. http://dx.doi.org/10.1039/c7ja00147a.

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Pullen, Alex, Mauricio Ibáñez-Mejía, George E. Gehrels, Juan C. Ibáñez-Mejía e Mark Pecha. "What happens when n= 1000? Creating large-n geochronological datasets with LA-ICP-MS for geologic investigations". J. Anal. At. Spectrom. 29, n.º 6 (2014): 971–80. http://dx.doi.org/10.1039/c4ja00024b.

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Huang, Chao, Hao Wang, Jin-Hui Yang, Lie-Wen Xie, Yue-Heng Yang e Shi-Tou Wu. "Further Characterization of the BB Zircon via SIMS and MC-ICP-MS for Li, O, and Hf Isotopic Compositions". Minerals 9, n.º 12 (11 de dezembro de 2019): 774. http://dx.doi.org/10.3390/min9120774.

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In this contribution, we report the results for the characterization of the BB zircon, a newly developed zircon reference material from Sri Lanka, via secondary ion mass spectrometry (SIMS) and multiple-collector inductively coupled plasma-mass spectrometry (MC-ICP-MS). The focus of this work was to further investigate the applicability of the BB zircon as a reference material for micro-beam analysis, including Li, O, and Hf isotopes. The SIMS analyses reveal that BB zircon is characterized by significant localized variations in Li concentration and isotopic ratio, which makes it unsuitable as a lithium isotope reference material. The SIMS-determined δ18O values are 13.81‰ ± 0.39‰ (2SD, BB16) and 13.61‰ ± 0.40‰ (2SD, BB40), which, combined with previous studies, indicates that there is no evidence of conspicuous O isotope heterogeneity within individual BB zircon megacrysts. The mean 176Hf/177Hf ratio of BB16 determined by solution MC-ICP-MS is 0.281669 ± 0.000012 (2SD, n = 29) indistinguishable from results achieved by laser ablation (LA)-MC-ICP-MS. Based on the SIMS and MC-ICP-MS data, BB zircon is proposed as a reference material for the O isotope and Hf isotope determination.

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Teses / dissertações sobre o assunto "Icp-Ms / mc-Icp-Ms"

Bertotti, Anelise Losangela. "Lu-Hf em zircão por LA-MC-ICP-MS". reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/56296.

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Atualmente a metodologia de Lu-Hf é um dos métodos mais utilizados na geocronologia, principalmente nas análises in situ em zircão por LA-ICP-MS. O interesse na aplicação desta metodologia, quando se dispõe de um sistema como o LA-ICP-MS, deve ser consignado à relativa simplicidade, sensibilidade e rapidez da análise. A alta concentração e a baixa mobilidade do Hf no zircão propiciam razões isotópicas e idades modelos bastante precisas, que podem subsidiar importantes inferências não só quanto à idade de extração mantélica, mas também quanto à sua possível história evolutiva, proveniência e estudos afins. Assim, o projeto de tese foi elaborado com base nos principais objetivos, o aprendizado, a implementação e a aplicação da metodologia de Lu-Hf em zircão por ICP-MS. Zircões de três diferentes áreas, previamente datados pela metodologia U-Pb, foram analisados: Anortosito de Capivarita (Brasil), Ofiolito de Aburrá (Colômbia) e a Bacia de Camamu (Brasil). As análises foram feitas utilizando equipamentos como o ICP-MS Neptune (ThermoFinnigan), e os lasers Excimer 193 nm (ArF, GeoLas) e o 213 UP (Nd:YAG, New Wave). O ofiolito estudado consiste de rochas máficas e ultramáficas. Análises de 12 grãos revelaram Hf(t) entre +2,01 e +5,35, enquanto as idades modelo TDM resultaram valores em um intervalo entre 1,15 e 1,44 Ga, sugerindo a presença de um magma juvenil com possível contaminação crustal e forte afinidade com as rochas da Província Rondoniana - San Ignacio. Zircões magmáticos e metamórficos do Anortosito de Capivarita, localizado na porção NE do Escudo Sul-Rio-Grandense, fizeram parte de um estudo de comparação para verificar a reprodutibilidade dos dados obtidos pela metodologia de Lu-Hf desenvolvida no LGI. As análises foram feitas primeiramente no LGI-UFGRS (Brasil) e depois no MAFIIC-MUN (Canadá). Os resultados dos dois laboratórios mostraram boa reprodutibilidade, as idades TDM e os valores de Hf obtidos foram concordantes dentro dos erros experimentais. Estes resultados forneceram informações sobre a proveniência do anortosito e sugeriram uma fonte juvenil para a fusão com algum grau de contaminação crustal Paleoproterozóica. A Bacia de Camamu está relacionada ao rompimento do Gondwana e pertence ao grupo de bacias sedimentares da margem leste brasileira. Zircões detríticos dos Grupos Brotas e Almada, relacionados às fases pré-rifte e rifte da bacia, foram analisados por U-Pb e Lu-Hf. No Grupo Brotas, 70% dos zircões analisados são de idade Cambriana-Vendiana, provenientes do Orógeno Araçuaí- Congo Ocidental levando em conta as medidas de paleocorrente de S-SW para NNE. No Grupo Almada, as principais fontes dos zircões são Paleoproterozóica e Arqueana, de proveniência direta do embasamento adjacente a Oeste da Bacia de Camamu, consistente com as medidas de paleocorrente de oeste para leste das unidades estudadas. Os zircões paleoproterozóicos e arqueanos analisados, mesmo os Neoproterozóicos e os Eopaleozóicos mostram um forte componente crustal retrababalhado com menor contribuição de crosta juvenil. Contudo, a metodologia de Lu-Hf por LA-ICP-MS aplicada em zircões de diferentes áreas mostrou o potencial em fornecer dados precisos e confiáveis para estudos de proveniência e de crescimento crustal, de modo a redimensionar cada vez mais a geocronologia.
Currently the methodology of Lu-Hf is one of the most widely used in geochronology, especially in in situ analysis in zircon by LA-ICP-MS. The interest in the application of this methodology, when it has a system like LA-ICP-MS, should be consigned to relative simplicity, sensitivity and speed of analysis. The high concentration and low mobility of Hf in zircon, provide isotopic ratios and model ages highly accurate that can support not only important inferences about the age of mantle extraction, but also as to its possible evolutionary history, provenance and related studies. Thus, the thesis project was elaborated based on main objectives, learning, implementation and application of Lu-Hf methodology in zircon by ICP-MS. Zircons from three different areas, previously dated by U-Pb method, were analyzed: Capivarita Anorthosite (Brazil), Aburrá Ophiolite (Colombia) and Camamu Basin (Brazil). The Lu-Hf in situ analyses were performed using equipments such as Neptune ICP-MS (ThermoFinnigan), and lasers Excimer 193 nm (ArF, GeoLas) and UP 213 (Nd: YAG, New Wave). The studied ophiolite consists of ultramafic and mafic rocks. Analyses of 12 grains revealed Hf(t) between +2.01 and +5.35, while the TDM model ages values resulted in a range between 1.15 and 1.44 Ga, suggesting the presence of a juvenile magma with possible crustal contamination and strong affinity with the rocks of the Rondonian-San Ignacio Province. Magmatic and metamorphic zircons from Capivarita Anorthosite, located in the NE portion of the Sul-Rio-Grandense Shield, were part of a comparison study to verify the reproducibility of obtained data by Lu-Hf methodology developed in the LGI. Analyses were performed first in the LGI-UFGRS (Brazil) and then at MAFIIC-MUN (Canada). Results from both laboratories show good reproducibility, TDM ages and Hf(t) values obtained are in agreement within experimental errors. These results provide information on the origin of anorthosite and suggested a juvenile source for the melt with some degree of Paleoproterozoic crustal contamination. Camamu Basin is related to the breakup of Gondwana and belongs to the group of sedimentary basins on the eastern Brazilian margin. Detrital zircons of Brotas and Almada Groups, related to the pre-rift and rift phases of the basin, were analyzed by U-Pb and Lu-Hf. In Brotas Group, 70% of analyzed zircons are Vendian-Cambrian age, from the Araçuaí-West Congo Belt taking into account the paleocurrent measurements from S-SW to N-NE. In Almada Group, the main sources of the zircons are Paleoproterozoic and Archean, with direct provenance from the basement adjacent to West Camamu Basin which is consistent with the paleocurrent measurements from west to east of the studied units. The analyzed Paleoproterozoic and Archean zircons, even the Neoproterozoic and Eopaleozoic show a strong reworked crustal component with small contribution of juvenile crust. However, the Lu-Hf methodology by LA-ICP-MS applied to zircons from different areas showed the potential to provide accurate and reliable data for provenance and crustal growth studies in order to resize increasingly the geochronology.

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Belissont, Rémi. "Germanium and related elements in sulphide minerals : crystal chemistry, incorporation and isotope fractionation". Thesis, Université de Lorraine, 2016. http://www.theses.fr/2016LORR0049/document.

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Le germanium est un métalloïde « stratégique » dans l’industrie high-tech, notamment pour la transition énergétique et le secteur des communications. Étant distinctement sidérophile, lithophile, chalcophile et organophile, le Ge possède un fort potentiel comme traceur géochimique. Ces travaux de thèse visent à améliorer la compréhension de la géochimie du cycle du Ge et des facteurs qui contrôlent son incorporation dans les minéraux et les gisements métalliques. Les cibles de cette étude concernent le gisement filonien à Zn de Saint-Salvy (Massif Central, France), le gisement filonien à Cu de Barrigão (Ceinture pyriteuse ibérique, Portugal), et le gisement à Zn–Cu de Kipushi (R.D. Congo). Les porteurs de Ge les plus importants sont respectivement la sphalérite (jusqu’à 2580 ppm), la chalcopyrite (jusqu’à 5750 ppm) et la réniérite (5,0–9,1 %). Les résultats montrent qu’il existe une relation de premier ordre entre la concentration en Ge dans la sphalérite et le type de gisement. La spectroscopie XANES par rayonnement synchrotron met en évidence la présence de Ge4+ en site tétraédrique dans les sulfures analysés. Les corrélations élémentaires observées dans la sphalérite et la chalcopyrite suggèrent une incorporation du Ge par co-substitutions, e.g., 3Zn2+ ↔ Ge4+ + 2(Cu,Ag)+ et 3Fe3+ ↔ 2Ge4+ + Cu+, ou via la création de lacunes cristallographiques, e.g., 2Zn2+ ↔ Ge4+ + ?. La corrélation positive δ74Ge–[Ge]ZnS des sphalérites de Saint-Salvy indiquerait que coefficient de partage (KdGe) augmenterai avec T. Les compositions isotopiques δ74Ge des sulfures étudiés varient de –5,72‰ à +3,67‰. Les compositions légères mesurées dans les gisements de Saint-Salvy et Barrigão semblent liées à des variations de température des fluides (basse à moyennes T) lors de l’incorporation de Ge en système ouvert, alors que la tendance marquée vers les compositions isotopiques lourdes à Kipushi indiquerait un fractionnement de Rayleigh
Germanium is a critical metalloid in many high-tech industries, especially for the energy transition and the communication sector. Being distinctly siderophile, lithophile, chalcophile and organophile, Ge can be a particularly useful geochemical tracer. This thesis aims at understanding the Ge geochemistry and the factors controlling its concentration in Ge-bearing minerals and ore deposits. Three contrasted Ge-bearing deposits were studied, the Saint-Salvy Zn vein-type deposit, French Massif Central, the Barrigão Cu vein-type deposit, Iberian pyrite belt, Portugal, and the Kipushi Zn–Cu carbonate-hosted deposit, Central African copper-belt, D.R. Congo. The most important Ge-bearing minerals are sphalerite (up to 2580 ppm Ge), chalcopyrite (up to 5750 ppm Ge), and renierite (5.0–9.1 wt.% Ge). The results show a first order relation between the Ge content and the deposition temperature. Synchrotron-based XANES spectroscopy showed that Ge4+ occur in tetrahedral sites in the studied sulphides. Element correlations suggest that Ge is chiefly incorporated in sphalerite and chalcopyrite through coupled substitutions, e.g., 3Zn2+ ↔ Ge4+ + 2(Cu,Ag)+ and 3Fe3+ ↔ 2Ge4+ + Cu+, respectively, or via the creation of lattice vacancies, e.g., 2Zn2+ ↔ Ge4+ + ?. The positive δ74Ge–Ge content correlation observed in sphalerite from Saint-Salvy could indicate that Ge partition coefficient (KdGe) increases with temperature. Ge isotopes in sulphides yield δ74Ge values spanning from –5.72‰ to +3.67‰. The light δ74Ge compositions of Saint-Salvy and Barrigão ores appear to be related to variations in low to moderate fluid temperatures during Ge uptake in open system (e.g., fluid cooling), while the trend towards heavy δ74Ge compositions observed at Kipushi likely translates a Rayleigh fractionation effect during ore formation in closed system, associated with significant fluid modification

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Bérail, Sylvain. "Nouvelles stratégies d’introduction d’échantillon en MC-ICP-MS pour la bio-géochimie isotopique du mercure en ultra-trace". Thesis, Pau, 2018. http://www.theses.fr/2018PAUU3019/document.

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En complément des analyses de concentration et de spéciation, les analyses des isotopes stables du mercure par MC-ICP-MS sont à l’heure actuelle un outil majeur pour tracer les sources et les transformations de cet élément dans l’environnement. Cette thèse propose le développement de techniques de pré-concentrations couplées au MC-ICP-MS afin de réaliser des analyses isotopiques de mercure au niveau du ng.L-1 (Ultra-trace). La stratégie de pré-concentration en ligne va générer des signaux transitoires courts dont la gestion en MC-ICP-MS représente un réel défi. Afin d’y répondre, une méthode de traitement de données adaptée à ce type de signaux ainsi qu’une méthode de correction du phénomène de dérive isotopique ont été développées. Dans le but de déterminer des compositions isotopiques en mercure total à de faibles concentrations, le couplage d’une génération de vapeur froide, d’une double amalgamation sur or (CVG-DGA) et d’un MC-ICP-MS a été développé. Cette nouvelle technique donne des précisions externes de l’ordre de 0.20 à 0.30‰ (2SD) pour des concentrations en mercure de 5 ng.L-1 en solution. Cette thèse présente également une nouvelle méthode d’analyse isotopique par espèce chimique (CSIA) réalisée à l’aide du couplage d’une chromatographie en phase gazeuse équipée d’un injecteur PTV (GC-PTV) et d’un MC-ICP-MS. Celle-ci permet l’analyse isotopique de plusieurs espèces chimiques avec des précisions externes de l’ordre de 0.30 à 0.40‰ (2SD) pour des concentrations en mercure de 150 ng.L-1 dans des échantillons biologiques.Les développements analytiques de cette thèse ont permis de mesurer directement et de façon automatisée des compositions isotopiques de mercure à des niveaux d’ultra-trace (jusqu’à 5ng.L-1) tout en conservant des précisions compatibles avec les principales questions environnementales posées. Ceci va permettre d’analyser des compartiments environnementaux contenant de faibles quantités de mercure (eaux naturelles, planctons,…) et ouvre ainsi de nouvelles perspectives pour une meilleure compréhension du cycle bio-géochimique du mercure
In addition to the quantitative and speciation analysis, the analysis of mercury stable isotopes by MC-ICP-MS are now a tool of choice to track sources and pathways of this element in the environment. This PhD thesis presents the development of hyphenation between pre-concentration techniques and MC-ICP-MS to measure isotopic composition of mercury at ng.L-1 levels (Ultra-trace). The on-line pre-concentration strategy will create short transient signals which represent a real challenge for MC-ICP-MS. In order to solve it, a data treatment strategy for this particular signals and a correction method for the isotopic drift were developed.The hyphenation between a cold vapor generation, a dual gold amalgamation (CVG-DGA) and a MC-ICP-MS was developed to determine total mercury isotopic composition. This new technique gives external precisions ranging from 0.20 to 0.30‰ (2SD) for Hg concentration in solution of 5 ng.L-1. This PhD thesis also reports a new method to perform mercury compound specific isotopic analysis (CSIA) using a gas chromatography fitted with a PTV injector (GC-PTV) coupled to the MC-ICP-MS. This allows the isotopic analysis of several species with external precisions ranging from 0.30 to 0.40‰ (2SD) for mercury concentration down to 150 ng.L-1 in biological samples.The analytical developments proposed in this PhD thesis allows to automatically and directly measure mercury isotopic compositions at ultra-trace levels (down to 5 ng.L-1) while keeping precision compatible with main environmental questions. This will allow to analyze environmental compartment containing very low amount of mercury (natural waters, planktons,…) and then open new perspectives for a better understanding of the bio-geochimical cycle of mercury

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Horn, Ingo, e Harald Behrens. "Laser ablation MC-ICP-MS and its application to diffusion in silicate glasses and melts". Universitätsbibliothek Leipzig, 2015. http://nbn-resolving.de/urn:nbn:de:bsz:15-qucosa-186586.

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Horn, Ingo, e Harald Behrens. "Laser ablation MC-ICP-MS and its application to diffusion in silicate glasses and melts". Diffusion fundamentals 12 (2010) 12, 2010. https://ul.qucosa.de/id/qucosa%3A13869.

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Akram, Waheed. "Zirconium isotope heterogeneities in the solar system". Thesis, University of Manchester, 2013. https://www.research.manchester.ac.uk/portal/en/theses/zirconium-isotope-heterogeneities-in-the-solar-system(0bc316ef-6e93-4609-a17b-f3c2255bad61).html.

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Laboratory measurements of primitive and differentiated meteorites have been made in order to understand the origin of isotopic anomalies. The element Zr is chosen for analysis, due to its potential for nuclear and astrophysical applications. Zirconium has five stable isotopes that are produced in different (neutron–capture) nucleosynthetic processes. By analysing the Zr isotope composition of meteorites, we are able to track the mixing of various neutron capture processes in the early Solar System. Measurements have been performed on carbonaceous, ordinary and enstatite chondrites, eucrites, the Moon and Earth. Samples are crushed, digested and passed through a two stage anion exchange separation to obtain a clean Zr fraction. All Zr measurements are made on a Nu Plasma multiple–collector inductively coupled plasma mass spectrometer (MC–ICPMS). The results indicate that the bulk of refractory Ca–Al rich inclusions of the Allende meteorite are characterised by uniform enrichments (around 2ε) of the neutron–rich isotope 96Zr, and potentially coupled with excesses reported for the neutron rich isotope 50Ti, indicating that both nuclides may have similar astrophysical origins. Analysis of bulk rock carbonaceous chondrites reveal 96Zr excesses (not exceeding 1ε) that scale with the abundance of CAIs. However, widespread 96Zr correlations are also seen, accompanied by minor depletions in 91Zr, which suggest the solar nebular had experienced thermal heating of some sort, altering the initial (possibly uniform) Zr isotope composition of the early Solar System from which planetary bodies formed.

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Engström, Emma. "Fractionation of the stable silicon isotopes studied using MC-ICP-MS : analytical method developments and applications in geochemistry /". Luleå : Department of Chemical Engineering and Geosciences, Division of Geosciences, Luleå University of Technology, 2009. http://pure.ltu.se/ws/fbspretrieve/3522867.

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Guéguen, Bleuenn. "Apport de la géochimie isotopique du Nickel à l'étude des dépôts métallifères océaniques". Thesis, Brest, 2013. http://www.theses.fr/2013BRES0089/document.

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Les explorations scientifiques menées depuis une quarantaine d’années ont permis d'identifier la diversité et la complexité des processus géologiques et géochimiques conduisant à la concentration des métaux dans les grands fonds océaniques. Les dépôts métallifères riches en hydroxydes de Fer et de Manganèse, tels que les encroûtements hydrogénétiques et hydrothermaux et les nodules polymétalliques, présentent des enrichissements variés en éléments d'intérêts économiques tels que le Ni, Cu, Co, Te, Pt et les Terres Rares. Bien que la minéralogie et la géochimie de ces dépôts aient été largement étudiées dans la littérature, les sources de métaux restent encore mal déterminées. Par conséquent, comprendre la géochimie de ces dépôts implique d’une part, de connaître les processus participant à leur genèse, et d’autre part d’avoir de meilleures connaissances sur les sources impliquées (par ex. flux continental et hydrothermal) et leur importance dans les grands cycles biogéochimiques des métaux dans les océans. Afin d’apporter de nouveaux éléments de réponse, notre approche a consisté à utiliser les compositions isotopiques des métaux comme traceurs biogéochimiques. Ce projet est structuré autour de deux hypothèses, (1) le développement et l’utilisation d’un nouveau outil géochimique que sont les isotopes du Ni pour tracer les sources et les processus d’enrichissements en métaux dans les dépôts métallifères océaniques ; (2) la combinaison de plusieurs systèmes isotopiques tels que Fe, Pb, Cu et Zn (et Ni) dans les encroûtements de fer-manganèse comme proxy de la composition isotopique de l’eau de mer profonde. Après avoir développé une méthode d’analyse des isotopes du Ni par MC-ICP-MS et estimé la variabilité isotopique du Ni dans les systèmes naturels par la caractérisation des grands réservoirs terrestres, nous avons évalué expérimentalement le fractionnementisotopique du Ni lors de son adsorption sur les oxyhydroxydes de Fe et Mn comme analogue à ce qui pourrait se produire dans les dépôts de Fe-Mn naturels. Les résultats indiquent que lors de l’adsorption du Ni, la phase solide est enrichie en isotopes légers par rapport à la solution avec des facteurs de fractionnement (Δ60/58Nimin/sol) variant de -1 ‰ pour la birnessite, -0.9 ‰ pour la goethite et -0.4 ‰ pour la ferrihydrite. A partir de ces résultats et d’autres études récentes, nous avons pu appuyer l’hypothèse selon laquelle d’un point de vue global la variabilité isotopique du Ni dans les dépôts métallifères océaniques riches en Fe et Mn s’explique par des processus d’enrichissement et de formation lors de l’incorporation des métaux dans les phases minérales de Fe et Mn plutôt que par des variations des compositions isotopiques des sources. Ainsi les encroûtements hydrogénétiques formés lentement à partir de l’eau de mer ne montrent pas de fractionnement isotopique du Ni, tandis que les dépôts hydrothermaux formés par des processus rapides liés aux apports hydrothermaux montrent des fractionnements du Ni plus importants. Puis, afin d’évaluer la possibilité d’utiliser les signatures isotopiques du Ni comme nouveaux traceurs paléocéanographiques, nous avons mené une étude comparative sur des encroûtements collectés dans le Pacifique Nord (proche de Hawaii) et le Pacifique Sud (proche de Tahiti). Dans ce contexte, les ncroûtements de fer-manganèse formés par précipitation très lente de l’ordre de quelques mm/Ma entre 1500 et 3000 m de profondeur, fournissent un enregistrement de plusieurs millions d’années des métaux dissous dans l’eau de mer. Après avoir réalisé une étude minéralogique et géochimique (éléments majeurs et traces) et calibré les taux de croissance des encroûtements, nous avons mesuré pour la première fois les compositions isotopiques du Ni, Fe, Zn, Cu et Pb sur la même série temporelle
Scientific explorations implemented for around forty years allow to identifying the diversity and the complexity of geological and geochemical processes conducting to metals concentration on the deep seafloor. Fe- and Mn-rich metalliferous deposits such as hydrogenetic and hydrothermal ferromanganese (Fe-Mn) crusts and polymetallic nodules, present various enrichment in elements of economic interests like Ni, Cu, Co, Te, Pt and Rare Earth Elements. Although the mineralogy and geochemistry of these deposits have been largely studied in the literature, metal sources remain poorly determined. Accordingly, understanding the geochemistry of these deposits implies to know which processes are involved in their formation but also to have a better knowledge of the sources (e.g. the continental and hydrothermal fluxes) and their importance in the global oceanic metal biogeochemical cycles. In order to fill this gap, our approach consisted in using metal stable isotope compositions as biogeochemical tracers. This project is organized around two hypotheses, (1) development and utilization of a new geochemical tool, namely Ni isotopes, for tracing metal enrichment sources and processes in oceanic metalliferous deposits; (2) combination of several isotope systematics such as Fe, Pb, Cu, Zn (and Ni) in Fe-Mn crusts as proxies of the deep seawater isotope composition. Upon developing an analytical method for measuring Ni isotopes by MC-ICP-MS and estimating the Ni isotopes variability in natural systems through the characterization of terrestrial reservoirs, we experimentally evaluated Ni isotope fractionation during adsorption on Fe- and Mn-oxyhydroxides since similar processes may potentially occur in natural Fe-Mn deposits. Results indicate that after Ni adsorption, the solid phase is enriched in light Ni isotopes relatively to the solution with fractionation factors (Δ60/58Nimin/sol) varying from -1 ‰ for birnessite, -0.9 ‰ for goethite and -0.4 ‰ for ferrihydrite. These results, and other recent studies, strengthen our hypothesis according to which Ni isotopes variability in Fe- and Mn-rich metalliferous deposits can be explained by enrichment and formation processes during metal incorporation in Fe and Mn mineral phases rather than variations in the isotopic composition of the sources. Thus, hydrogenetic Fe-Mn crusts formed slowly from seawater dissolved metals do not show significant Ni isotope fractionation, whereas hydrothermal deposits formed by relatively rapid processes as a result of hydrothermal inputs exhibit important Ni isotope fractionation

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Hays, Naydene Richelle. "Geochronology of Shergottite Meteorites: Using LA-MC-ICP-MS Analysis to Examine U-Th-Pb Systematics of Baddeleyites and Phosphates". Thesis, The University of Arizona, 2011. http://hdl.handle.net/10150/202753.

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I present in-situ analysis of U-Pb systematics in baddeleyite and whitlockite grains from a suite of Martian shergottites. 9 baddeleyite grains (5 from basaltic shergottite NWA 2986 and 4 from olivine-phyric shergottite RBT 04262) were analyzed by LA-MC-ICP-MS. Despite low uranium and radiogenic lead concentrations , maximum ages could be determined for both samples: 187 ± 50 to 1236 ± 430 for NWA 2986 and 100 ± 9 to 526 ± 48 for RBT 04262. The same analytical procedures were used for whitlockites in NWA 2986, ALHA 77005, EETA 79001, NWA 2646 and LAR 06319. As with the baddeleyite analyses, maximum ages were calculated. These ages ranged from 110 ± 1 for LAR 06319 to 561 ± 185 for NWA 2646. These results, which are consistent with previous analyses, mean that the ~ 4 Ga age determined from Pb-Pb analyses cannot time the igneous crystallization of these meteorites.

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Nonell, Anthony. "Géochimie élémentaire et isotopique du Zn, du Sr et du Pb dans les gaz volcaniques : méthodologies d'échantillonnage et apports à la compréhension des interactions fluides/solides". Phd thesis, Université Paul Sabatier - Toulouse III, 2005. http://tel.archives-ouvertes.fr/tel-00011689.

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Ce manuscrit présente les premiers résultats d'études élémentaires et isotopiques du Zn, du Sr et du Pb, réalisées dans les principaux types d'échantillons liés aux gaz volcaniques (gaz, sublimés, eaux thermales, roches), ainsi que deux nouvelles méthodologies d'échantillonnage des émanations volcaniques. Les variations isotopiques du Zn observées au Merapi suggèrent que les processus de changement de phase (fluides/solides) peuvent provoquer des fractionnements isotopiques significatifs des éléments trace métalliques. L'étude couplée Sr/Pb réalisée à Vulcano indique que les compositions en éléments trace métalliques des fumerolles et des eaux thermales sont influencées par les sources naturelles et anthropiques. Ce travail a aussi permis la mise au point de nouvelles méthodologies d'échantillonnage et d'analyse des gaz et des panaches volcaniques, permettant d'accéder à la composition chimique complète de ces manifestations gazeuses de manière simple et efficace.

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Capítulos de livros sobre o assunto "Icp-Ms / mc-Icp-Ms"

Cocherie, Alain, e 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.

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Kiseleva, Daria V., Natalia I. Shishlina, Maria V. Streletskaya, Natalia G. Soloshenko, Tatyana G. Okuneva e Evgeny S. Shagalov. "MC ICP-MS Lead Isotope Analysis of Archaeological Metal Artifacts from the Bronze Age Sites of Eurasia". In Springer Proceedings in Earth and Environmental Sciences, 133–41. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-48864-2_18.

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Seifert, Th, E. Niederschlag, E. Pernicka e F. Fiedler. "Lead isotope pilot study from ore deposits in the Erzgebirge, Germany, and surrounded areas by multiple-collector inductively coupled plasma mass spectrometry (MC-ICP-MS)". In Mineral Deposits at the Beginning of the 21st Century, 1095–98. London: CRC Press, 2022. http://dx.doi.org/10.1201/9781003077503-281.

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Chaussidon, Marc, Zhengbin Deng, Johan Villeneuve, Julien Moureau, Bruce Watson, Frank Richter e Frédéric Moynier. "5 In Situ Analysis of Non-Traditional Isotopes by SIMS and LA–MC–ICP–MS: Key Aspects and the Example of Mg Isotopes in Olivines and Silicate Glasses". In Non-Traditional Stable Isotopes, editado por Fang-Zhen Teng, James Watkins e Nicolas Dauphas. Berlin, Boston: De Gruyter, 2017. http://dx.doi.org/10.1515/9783110545630-006.

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Miśta-Jakubowska, Ewelina, Renata Czech-Błońska, Marcin Lewandowski e Sebastian Tyszczuk. "Analiza technologiczna i surowcowa situli z grobu 154 oraz elementów naszyjnika z grobu 161 ze stanowiska 12 w Kazimierzy Wielkiej (Technological analysis and raw material provenancing of the situla from grave 154 and the elements of the necklace from grave 161 from site 12 in Kazimierza Wielka)". In Kazimierza Wielka, stanowisko 12. Od neolitycznej osady do cmentarzyska z okresu wpływów rzymskich, 337–51. Wydawnictwo Profil-Archeo, 2024. https://doi.org/10.33547/oda-sah.12.kaz.18.

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The situla from grave 154 and a set of objects made of copper alloys from grave 161 were subjected to archaeometric analysis to identify the materials and manufacturing methods. Preliminary nondestructive analyses were also conducted on the surface of four significantly degraded glass beads from grave 161. Complementary techniques, including hXRF, XRF, and SEM-EDS, were applied depending on the research problem and the morphology of the examined object or its structural elements. Additionally, provenance studies of the raw materials were performed using lead isotope ratio analysis (MC-ICP-MS) for the situla,three bucket-shaped beads made of copper alloy, and one glass bead from grave 161. The studies revealed that the situla and its elements (attachments, handle, and dolphin-shaped legs) were made of leaded bronze with a melting point of 800–900°C. This facilitated the forming of the body and casting of the decorative elements. Dimensional analysis using 3D scanning of the attachments and dolphins indicates that the former were made using a reusable casting mold, while the latter were created using the lost-wax technique. To join the body, a strip enriched with tin and lead was used, which allowed the welding temperature to be lowered to 700°C. Soft tin-based solders were used to join the attachments. For attaching the dolphin legs to the bottom, a solder mixture of tin filings and a viscous substance, likely resin, was applied. The raw material used to produce the situla probably originates from the Cyclades Islands. The analysis of copper alloys from grave 161 revealed significant compositional diversity. The looped pendant and an object identified as a small chisel were made of bronze. Two bucket-shaped pendants were made of brass, and their loops were soldered using a mixture of tin and lead, with some containing mercury. The third pendant was made of an alloy of copper, zinc, tin, and silver, with its loop soldered using a tinlead mixture. The fourth pendant, where no traces of loop attachment remain, was made of bronze. All analysed bucket-shaped pendants and their components were made from ore sourced from southwestern Europe, with two specifically originating from the Massif Central. In the case of one pendant, an Alpine origin (northern Italy) of the raw material cannot be ruled out. The artefacts were probably made in local workshops using bronze scrap obtained from vessels or other objects imported from the Roman provinces. The beads from this grave are made of lead glass coloured with copper and iron oxides. The lead used in the production of the glass also originates from southeastern France. Therefore, the entire analysed assemblage of grave 161 appears uniform in terms of raw material origin.

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Trabalhos de conferências sobre o assunto "Icp-Ms / mc-Icp-Ms"

Scott, Sean, Kirby Hobbs, Daniel Sullivan, Isaac Arnquist e Amanda French. "Analysis of uranium isotopes using the Neoma MS/MS MC-ICP-MS". In Goldschmidt 2024. United States of America: Geochemical Society, 2024. https://doi.org/10.46427/gold2024.24312.

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Gareev, B., G. Batalin e A. Chugaev. "Strontium Chemostratigraphy by the Mc-Icp-Ms Methodology". In 29th International Meeting on Organic Geochemistry. European Association of Geoscientists & Engineers, 2019. http://dx.doi.org/10.3997/2214-4609.201902972.

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Telouk, Philippe, Danae Guiserix, Grant Craig, Jeremy Martin e Vincent Balter. "Strontium isotopes measurement of certified reference materials, igneous and biological apatite samples using the MC-ICP-MS Neoma in MS/MS mode and laser ablation (LA-MC-ICP-MS/MS)". In Goldschmidt2022. France: European Association of Geochemistry, 2022. http://dx.doi.org/10.46427/gold2022.10832.

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Zhang, Bidong, Dapeng Zhu, Ran Zhao, Audrey Bouvier e Chris Timoner. "In situ> Rb-Sr geochronology using MC-ICP-MS/MS". In Goldschmidt 2024. United States of America: Geochemical Society, 2024. https://doi.org/10.46427/gold2024.22429.

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Cruz-Uribe, Alicia, Joshua Garber, Grant Craig, Cemil Arkula, Bence Paul e Claudia Bouman. "Single spot Rb-Sr isochron dating of micas by LA-MC-ICP-MS/MS". In Goldschmidt2023. France: European Association of Geochemistry, 2023. http://dx.doi.org/10.7185/gold2023.16752.

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Craig, Grant, Markus Pfeifer, Jenny Roberts, Claudia Bouman, Nicholas Lloyd e Johannes Schwieters. "Iron in low resolution? Removing molecular interferences with the Neoma MS/MS MC-ICP-MS." In Goldschmidt2023. France: European Association of Geochemistry, 2023. http://dx.doi.org/10.7185/gold2023.15745.

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Craig, Grant, Hauke Vollstaedt, Nicholas Lloyd, Claudia Bouman e Johannes B. Schwieters. "A Perfect MC-ICP-MS Detector Array for Transient Signal Analysis?" In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.487.

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Frères, Evelyn, e Dominique Weis. "A Systematic Characterisation of Concentration Mismatch Effects in MC-ICP-MS". In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.747.

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Genske, Felix, Suzette Timmerman, Simon Schurr, Harald Strauß e Andreas Stracke. "Multiple Sulfur Isotope Analysis of Silicate Samples by MC-ICP-MS". In Goldschmidt2020. Geochemical Society, 2020. http://dx.doi.org/10.46427/gold2020.816.

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Suzuki, Mitsuru, Tsuyoshi Iizuka, Kota Yamamoto e Takafumi Hirata. "Development of high-precision La isotope analysis by MC-ICP-MS". In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.6625.

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Relatórios de organizações sobre o assunto "Icp-Ms / mc-Icp-Ms"

Wende, Allison Marie, Jeremy David Inglis, Anthony Douglas Pollington, William Scott Kinman e Robert Ernest Steiner. Los Alamos National Laboratory Methods for NWAL Measurements by MC-ICP-MS. Office of Scientific and Technical Information (OSTI), março de 2019. http://dx.doi.org/10.2172/1501765.

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Wimpenny, J., e P. Sotorrio. Developing Methodology to Determine Pu Isotopic Composition by Laser Ablation MC-ICP-MS. Office of Scientific and Technical Information (OSTI), abril de 2023. http://dx.doi.org/10.2172/1994468.

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Denton, Joanna S., Travis Jay Tenner, Todd L. Williamson, Stephen Philip Lamont e Robert Ernest Steiner. Plutonium particle analysis by LG-SIMS and LA-MC-ICP-MS for environmental safeguards. Office of Scientific and Technical Information (OSTI), maio de 2018. http://dx.doi.org/10.2172/1438129.

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Wimpenny, J., e K. Samperton. Characterization of U Isotope Ratios by Laser Ablation MC-ICP-MS for IAEA Safeguards. Office of Scientific and Technical Information (OSTI), abril de 2021. http://dx.doi.org/10.2172/1893591.

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Matte, S., M. Constantin e R. Stevenson. Mineralogical and geochemical characterisation of the Kipawa syenite complex, Quebec: implications for rare-earth element deposits. Natural Resources Canada/CMSS/Information Management, 2022. http://dx.doi.org/10.4095/329212.

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The Kipawa rare-earth element (REE) deposit is located in the Parautochton zone of the Grenville Province 55 km south of the boundary with the Superior Province. The deposit is part of the Kipawa syenite complex of peralkaline syenites, gneisses, and amphibolites that are intercalated with calc-silicate rocks and marbles overlain by a peralkaline gneissic granite. The REE deposit is principally composed of eudialyte, mosandrite and britholite, and less abundant minerals such as xenotime, monazite or euxenite. The Kipawa Complex outcrops as a series of thin, folded sheet imbricates located between regional metasediments, suggesting a regional tectonic control. Several hypotheses for the origin of the complex have been suggested: crustal contamination of mantle-derived magmas, crustal melting, fluid alteration, metamorphism, and hydrothermal activity. Our objective is to characterize the mineralogical, geochemical, and isotopic composition of the Kipawa complex in order to improve our understanding of the formation and the post-formation processes, and the age of the complex. The complex has been deformed and metamorphosed with evidence of melting-recrystallization textures among REE and Zr rich magmatic and post magmatic minerals. Major and trace element geochemistry obtained by ICP-MS suggest that syenites, granites and monzonite of the complex have within-plate A2 type anorogenic signatures, and our analyses indicate a strong crustal signature based on TIMS whole rock Nd isotopes. We have analyzed zircon grains by SEM, EPMA, ICP-MS and MC-ICP-MS coupled with laser ablation (Lu-Hf). Initial isotopic results also support a strong crustal signature. Taken together, these results suggest that alkaline magmas of the Kipawa complex/deposit could have formed by partial melting of the mantle followed by strong crustal contamination or by melting of metasomatized continental crust. These processes and origins strongly differ compare to most alkaline complexes in the world. Additional TIMS and LA-MC-ICP-MS analyses are planned to investigate whether all lithologies share the same strong crustal signature.

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Wimpenny, J., e K. Samperton. Method Development for Measuring U Isotope Ratios by Laser Ablation MC-ICP-MS. Task 1: Hardware Setup. Office of Scientific and Technical Information (OSTI), janeiro de 2021. http://dx.doi.org/10.2172/1763182.

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Wimpenny, J., P. Sotorrio e K. Samperton. Development of Analytical Method for Measuring U and Pu Particles by Laser Ablation MC-ICP-MS for the NWAL. Office of Scientific and Technical Information (OSTI), setembro de 2021. http://dx.doi.org/10.2172/1994466.

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Inglis, Jeremy, Andrew Reinhard, Azim Kara, Robert Steiner, Stephen Lamont e Michael Singleton. Comparison of the sensitivity of 236U measurements in environmental samples by MC-ICP-MS and ATONA based high precision U TIMS measurements. Office of Scientific and Technical Information (OSTI), setembro de 2024. http://dx.doi.org/10.2172/2447733.

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