WinGrt, a Windows program for garnet supergroup minerals

Yavuz, Fuat; Yıldırım, Demet Kıran

doi:10.3190/jgeosci.303

Cited by 13 publications

(7 citation statements)

References 59 publications

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“…Respective ranges of dominant cation contents measured for the six garnet types were: [32] to recast the EMP analyses expressed as weight percent oxides into endmember garnet components based upon a calculation of the amounts of Fe 2+ , Fe 3+ , and Mn 3+, by stoichiometric constraints. Other programs for calculating garnet components from chemical analyses [33,34] produced similar results. Representative examples of our microprobe analyses for each garnet type are given in Table 1.…”

Section: Garnet Compositionmentioning

confidence: 57%

Analysis of Garnet by Laser-Induced Breakdown Spectroscopy—Two Practical Applications

et al. 2021

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Laser-induced breakdown spectroscopy (LIBS) is a simple and straightforward technique of atomic emission spectroscopy that can provide multi-element detection and quantification in any material, in-situ and in real time because all elements emit in the 200–900 nm spectral range of the LIBS optical emission. This study evaluated two practical applications of LIBS—validation of labels assigned to garnets in museum collections and discrimination of LCT (lithium-cesium-tantalum) and NYF (niobium, yttrium and fluorine) pegmatites based on garnet geochemical fingerprinting, both of which could be implemented on site in a museum or field setting with a handheld LIBS analyzer. Major element compositions were determined using electron microprobe analysis for a suite of 208 garnets from 24 countries to determine garnet type. Both commercial laboratory and handheld analyzers were then used to acquire LIBS broadband spectra that were chemometrically processed by partial least squares discriminant analysis (PLSDA) and linear support vector machine classification (SVM). High attribution success rates (>98%) were obtained using PLSDA and SVM for the handheld data suggesting that LIBS could be used in a museum setting to assign garnet type quickly and accurately. LIBS also identifies changes in garnet composition associated with increasing mineral and chemical complexity of LCT and NYF pegmatites.

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Section: Garnet Compositionmentioning

confidence: 57%

Analysis of Garnet by Laser-Induced Breakdown Spectroscopy—Two Practical Applications

et al. 2021

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“…Corrections were performed according to the ZAF method. The mineral structural formulas were calculated using Winpyrox (Yavuz 2013), Wingrt (Yavuz and Yildirim 2020), the spreadsheet of Locock (2008) and Minpet (Richard 1995). Temperature and pressure estimates were obtained using the spreadsheet PTEXCL (available at cms.…”

Section: Analytical Techniquesmentioning

confidence: 99%

Composition and P-T conditions of the lithospheric mantle beneath the Azimuth 125º Lineament, Northern and Southeastern Brazil: constraints from peridotite xenoliths enclosed in diamond-bearing kimberlites

Almeida¹,

Rodrigues²,

Neto³

et al. 2022

JGSB

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We present new petrographic and chemical data together with calculated P-T equilibrium conditions of peridotite xenoliths enclosed in kimberlites from Rondônia, Northern Brazil (Cosmos-1 and Carolina-1) and Minas Gerais, Southeastern Brazil (Canastra-1) located in the Azimuth 125º Lineament. The composition of the mantle minerals is distinct in both areas, which can be related to the diversity of the lithospheric mantle beneath the southwestern portion of the Amazonian Craton and the Brasília Belt. New and compiled chemical data indicate that subcalcic G10 garnet occurs in samples from the Canastra-1 kimberlite and other occurrences of the Alto Paranaíba Igneous Province and can be related to the remnants of the Archean lithospheric mantle of the São Francisco Craton beneath the area. The garnets from Rondônia are mostly G5 (pyroxenitic) and G9 (lherzolitic) with a higher abundance of G3 (eclogitic) and G4 (pyroxenitic/eclogitic) relative to the Alto Paranaíba Igneous Province. Higher pressures and temperatures were calculated for the samples from Rondônia (40-60 kbar and 1030-1380 ºC) compared to samples from Minas Gerais (25-40 kbar and 730-1000 ºC). The peridotite xenoliths from Rondônia show P-T equilibrium conditions in the diamond stability field and can be the source of at least part of the diamond from the area. The P-T stability fields of the xenoliths from both locations are aligned close to the 40 mW/m2 geotherm. The data indicate that the cratonic 40 mW/m2 geothermal gradient in Rondônia may be related to a process of thermal relaxation of the lithospheric mantle after the Paleoproterozoic to Mesoproterozoic tectonothermal events of the southwestern Amazonian Craton until the sampling of the xenoliths by the magma in the Permian-Triassic.Composition and P-T conditions of the lithospheric mantle beneath the Azimuth 125º Lineament, Northern and Southern Brazil: constraints from peridotite xenoliths enclosed in diamond-bearing kimberlites Accepted manuscript -Uncorrected pre-proof This is a PDF file containing an unedited and non-definitive version of a manuscript that has been accepted for publication by the Journal of the Geological Survey of Brazil -JGSB, which serves to provide early visibility of the article. Being an uncorrected preproof version, errors may appear during the production process (language review, formatting and proof review), and these can affect the final content of the article and all legal disclaimers (https://jgsb.cprm.gov.br/index.php/journal/6).

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“…Such calculations can be easily performed using published mineral formulae calculation programs that are mainly free Excel-based applications. Most of these programs are mineral-specific formulae calculators with, or without, thermobarometry tools, for example: amphibole (Yavuz, 1996(Yavuz, , 2007Locock, 2014;Li et al, 2020a); mica (Yavuz and Öztaş, 1997;Yavuz, 2001;Li et al, 2020b); pyroxene (Yavuz, 2013); garnet (Yavuz and Yildirim, 2020); tourmaline (Yavuz, 1997); and magnetite-ilmenite (Lepage, 2003;Hora et al, 2013;Yavuz, 2021). A few general mineral formulae calculation programs also included in the literature are: Afifi and Essene (1988); Rock and Caroll (1990); Griffin et al (1991); De Bjerg et al (1992Bjerg et al ( , 1995; Brandelik (2009) etc.…”

Section: Introductionmentioning

confidence: 99%

MagMin_PT: An Excel-based mineral classification and geothermobarometry program for magmatic rocks

Gündüz

Asan

2022

MinMag

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Igneous rock forming minerals carry valuable information from the deep earth that is not directly accessible to the surface. Each phase represents physico-chemical conditions under which various magmatic processes occur at a wide range of depths from upper mantle to shallow crustal levels. These processes are cryptically inscribed in the whole-rock and mineral chemistry (e.g. major elements, trace elements, isotopic ratios) and the mineral textures (equilibrium vs. disequilibrium features), and intensive variables (e.g. pressure, P; temperature, T) as well.Therefore, special attention should be given to igneous minerals to better understand processes operated in their journey from source through magma chamber and conduit system to the earth surface.MagMin_PT is an Excel © based user-friendly program, designed to calculate mineral formulae and end-members, and to estimate pressure and temperature (e.g. geothermobarometry) from electron microprobe (EPMA) data, from magmatic rocks. The program operates the most common igneous rock-forming minerals (e.g. olivine, pyroxene, amphibole, biotite, feldspar, magnetite, ilmenite, apatite and zircon), resulting in various classification diagrams and P-T plots. Whole-rock or glass composition needs to be entered together with EPMA data into the program to check equilibration status in most P-T calculation models. Fe 2+ and Fe 3+ estimation is routinely performed in MagMin_PT based on the stoichiometric constrains, and machine learning method to some extent for different iron-bearing minerals. MagMin_PT is also able to carry out further calculations including fugacity, magmatic water content and saturation-temperature which are useful for igneous petrology studies. Graphical and numerical output produced by the program can be easily copied to further process in another media.

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WinGrt, a Windows program for garnet supergroup minerals

Cited by 13 publications

References 59 publications

Analysis of Garnet by Laser-Induced Breakdown Spectroscopy—Two Practical Applications

Analysis of Garnet by Laser-Induced Breakdown Spectroscopy—Two Practical Applications

Composition and P-T conditions of the lithospheric mantle beneath the Azimuth 125º Lineament, Northern and Southeastern Brazil: constraints from peridotite xenoliths enclosed in diamond-bearing kimberlites

MagMin_PT: An Excel-based mineral classification and geothermobarometry program for magmatic rocks

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