A cathodoluminescence-assisted LA-ICP-MS study of topaz from different geological settings

Machado, Michel Ferreira; Graça, Leonardo Martins

doi:10.1590/2317-4889201820170127

Cited by 6 publications

(2 citation statements)

References 36 publications

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“…This may account for the observation that Ti abundance is low in the gas phase (e.g., Symonds and Reed 1993;Shevko et al 2018). In spite of these complexities, Ti 4+ contents are quite variable in topaz, and can reach 480 ppm (Gauzzi and Graça 2018), suggesting that the Ti contents in the topaz studied here, had not reached saturation in Ti 4+ content.…”

Section: Accommodation Of Trace Elements In Tetrahedral Coordinationmentioning

confidence: 70%

Gas-mediated trace element incorporation into rhyolite-hosted topaz: A synchrotron microbeam XAS study

Schaub,

Northrup,

Nekvasil

et al. 2023

American Mineralogist

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Magmatic gas exsolving during late-stage cooling of shallow magmas has been considered an important facilitator of low-pressure alteration and metal transport. However, the chemical properties of such gas, particularly its metal transport mechanisms and capacity, remain elusive.Trace elements in minerals produced by gas-mediated surface reaction or precipitation from gas capture details of gas composition and reaction pathways. However, interpretation of mineral trace element contents is dependent on understanding crystallographic controls on gas/mineral partitioning. This work investigates the structural accommodation of As, Mn, Ga, Ge, Fe, and Ti in vapor-deposited topaz of vesicular topaz rhyolite from the Thomas Range, Utah, through single-crystal synchrotron microbeam X-ray techniques on picogram quantities of those trace elements. X-ray absorption near edge structure (XANES) data indicates that these elements are incorporated into topaz as As 5+ , Fe 3+ , Mn 3+ , Ti 4+ , Ga 3+ , and Ge 4+ . Extended X-ray absorption fine structure (EXAFS) analysis for these trace elements, compared to EXAFS of structural Al and Si, reveals that As 5+ and Ge 4+ are incorporated directly into the tetrahedral site of the topaz This is the peer-reviewed, final accepted version for American Mineralogist, published by the Mineralogical Society of America.The published version is subject to change. Cite as Authors (Year) Title. American Mineralogist, in press.

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Section: Accommodation Of Trace Elements In Tetrahedral Coordinationmentioning

confidence: 70%

Gas-mediated trace element incorporation into rhyolite-hosted topaz: A synchrotron microbeam XAS study

Schaub,

Northrup,

Nekvasil

et al. 2023

American Mineralogist

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“…Rutiles from the Rodrigo Silva topaz mines are prismatic and vary in length from 1 cm to 4 cm along the c axis. Crystals were sampled from a soil sample derived from of intense weathering of hydrothermally altered dolomitic rocks of the Itabira and Piracicaba Groups, Minas Supergroup (Brito Barreto and Bittar 2010, Gauzzi and Graça 2018, Gauzzi et al . 2018).…”

Section: Applicationsmentioning

confidence: 99%

U‐Pb Saturn: New U‐Pb/Pb‐Pb Data Reduction Software for LA‐ICP‐MS

Silva

Lana

Mazoz

et al. 2023

Geostandard Geoanalytic Res

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ICP-MS data reduction. It has been developed to provide easy interaction with and visualisation of LA-ICP-MS U-Pb datasets, and allows fast and reliable data reduction of hundreds of data-points. Saturn offers dynamic graphic interfaces to quickly view, evaluate, and plot U-Pb and Pb-Pb isotope data. It operates online (or offline), giving the freedom to change parameters and reprocess data at any stage of data acquisition. The main interface allows the user to: (1) choose the best statistics for drift correction, (2) include/exclude offset factors and (3) apply (or not) Pb c corrections in different modes. Signal intensities are displayed in a separate graphic interface that allows users to interact with the time-resolved signal of individual spot analyses. All graphic windows are interactive; any modification to data treatment (e.g., inclusion or exclusion of analyses of reference material, or modification of the timeresolved signal windows) is instantaneously updated on the data tables. Saturn is particularly attractive for beginners in LA-ICP-MS U-Pb geochronology as it is non-commercial, easy to install, and very interactive. Coding information and a version of the software can be accessed at http://www.air.ufop.br.

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Polycrystals of “imperial” topaz from Minas Gerais state, Brazil

et al. 2019

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A cathodoluminescence-assisted LA-ICP-MS study of topaz from different geological settings

Abstract: In this study, the crystallization dynamics and the fingerprints of two topaz crystals from the Ouro Preto region (Brazil Ca, Cr, V, Zn, LREE, HREE and W.

Cited by 6 publications

References 36 publications

Gas-mediated trace element incorporation into rhyolite-hosted topaz: A synchrotron microbeam XAS study

Gas-mediated trace element incorporation into rhyolite-hosted topaz: A synchrotron microbeam XAS study

U‐Pb Saturn: New U‐Pb/Pb‐Pb Data Reduction Software for LA‐ICP‐MS

Polycrystals of “imperial” topaz from Minas Gerais state, Brazil

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