mixing properties thermobarometers

(PDF) A statistical model of thermodynamic mixing properties …

Large uncertainty in the mixing properties exists for Ca-rich gar- nets. There should be a Ca-Mg-Fe ternary interaction parameter (7110 llmol). Estimated molar mixing properties (in J, K, and J ...

Mixing properties of phengitic micas and revised garnet …

Mixing properties of phengitic micas and revised garnet-phengite thermobarometers

An experimental calibration of the "Nickel in Garnet …

II. New thermobarometers, and practical assessment of existing thermobarometers. J Petrol 31:1353–1378. Google Scholar Brey G, Köhler T, Nickel KG (1990) …

Insights on deep, accretionary subduction processes from the …

Mixing properties of phengitic micas and revised garnet–phengite thermobarometers. Journal of Metamorphic Geology (2002) R.G. Coleman et al. Distribution and age of high-grade blueschists, associated eclogites, and amphibolites from Oregon and California. Geological Society of America Bulletin

MagMin_PT: An Excel-based mineral classification and …

The program includes several thermobarometers (e.g. plagioclase–liquid, alkali feldspar–liquid, two feldspar etc). For mineral–liquid thermobarometers, users should enter their whole-rock or glass composition into the 'Data Input' sheet, and then test for equilibrium between pairs on the basis of the Ab–An exchange coefficient ( K D ...

FeMg partitioning between coexisting garnet and …

Temperature and pressure dependence of Fe-Mg partitioning between garnet and phengite, with particular reference to eclogites. AbstractExperimental data combined with data from …

Ternary-feldspar mixing relations and thermobarometry

The calculated anorthite-orthoclase interaction parameters permit simultaneous pressure-temperature solution of activity-composition relations based on anorthite, albite, and orthoclase exchange reactions between coexisting ternary feldspars. The proposed "ternary-feldspar thermobarometer" has been used to calculate equilibration conditions ...

Thermodynamic modelling of the phengite geobarometry

Coggon R, Holland T J B. Mixing properties of phengitic micas and revised garnet-phengite thermobarometers. J Metamorph Geol, 2002, 20: 683–696. Article Google Scholar White R W, Powell R, Holland T J B. Calculation of partial melting equilibria in the system Na 2 O-CaO-K 2 O-FeO-MgO-Al 2 O 3-SiO 2-H 2 O (NCKFMASH). J Metamorph …

[PDF] Thermodynamic Mixing Models for Muscovite …

Mixing properties of phengitic micas and revised garnet‐phengite thermobarometers. R. Coggon T. Holland. Geology. 2002; Mixing properties for muscovite–celadonite–ferroceladonite solid solutions are derived from combining available experimental phase equilibrium data with tabulated thermodynamic data for mineral ...

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Metamorphic evolution and age constraints of the garnet …

Mixing properties of phengitic micas and revised garnet-phengite thermobarometers. Journal of Metamorphic Geology 20, 683 –96.CrossRef Google Scholar. Coleman, R. G. & Wang, X. 1995. ... Mixing properties and activity-composition relationships of chlorites in the system MgO–FeO–Al 2 O 3 –SiO 2 –H 2 O.

Metamorphic evolution of garnet amphibolite in the

Using these thermobarometers with compositions from garnet rims, plagioclase and amphibole rims, the P–T conditions are calculated to be 428–766 °C at 0.64–1.16 GPa for sample SHS26, and 332–674 °C at 0.93–1.11 GPa for sample BSW05. The. Acknowledgments

Increasing complexity in magmatic architecture of volcanoes …

New clinopyroxene-liquid thermobarometers for mafic, evolved, and volatile-bearing lava compositions, with applications to lavas from Tibet and the Snake River Plain, Idaho. Am. Mineral. 88, 1542 ...

A statistical model of thermodynamic mixing properties of …

This provides an opportunity to evaluate the uncertainties in mineralogic thermobarometers involving garnets of compositions dissimilar to those used in the experiments on which the garnet mixing models are based. ... Large uncertainty in the mixing properties exists for Ca-rich garnets. There should be a Ca-Mg-Fe ternary …

A statistical model of thermodynamic mixing properties of …

Large uncertainty in the mixing properties exists for Ca-rich gar­nets. There should be a Ca-Mg-Fe ternary interaction parameter (7110 J/mol). ... This provides an opportunity to evaluate the uncertainties in mineralogic thermobarometers involving garnets of compositions dissimilar to those used in the ex­periments on which the garnet …

Empirical phengite geobarometer: Background, calibration, and

Phengite is a common metamorphic mineral stable in a wide pressure range. The dependence of pressure on silicon content established in the mid-20th century allowed us to propose a phengite-based geobarometer. Recently, the phengite geobarometer was calibrated by Caddik and Thompson (2008) but in the narrow pressure range. However, …

Experimental study of subsolidus phase relations and mixing properties

The data were fitted to the Redlich-Kister equation for a ternary solution, providing the following mixing properties of the CaMgSi 2 O 6-CaAl 2 SiO 6-Ca 0.5 AlSi 2 O 6 ... + quartz at lower pressures and pyroxene + garnet + kyanite + quartz at higher pressures are potentially useful as thermobarometers, applicable to quartz-bearing granulites ...

Long length scales of element transport during reaction …

Coggon R, Holland TJB (2002) Mixing properties of muscovite-celadonite-ferroceladonite-paragonite micas and revised garnet-phengite thermobarometers. J Metamorph Geol 20:683–696. Article Google Scholar Diener JFA, Powell R (2010) Influence of ferric iron on the stability of mineral assemblages. J Metamorph Geol 28:599–613

Mixing properties of phengitic micas and revised garnet …

Mixing properties of phengitic micas and revised garnet-phengite thermobarometers. Authors. R. Coggon; T.J.B. Holland; Publication date 1 September 2002. Publisher. Doi. ... the enthalpy of mixing among the end-members muscovite–celadonite–ferroceladonite is nearly ideal, although the Gibbs energies of …

Mixing properties of phengitic micas and revised …

Mixing properties of phengitic micas and revised garnet-phengite thermobarometers. R. Coggon, T. J. B. Holland. First published: 30 August 2002. https://doi/10.1046/j.1525-1314.2002.00395.x. Citations: 689. Read the full text. PDF. …

Geothermobarometry of UHP and HP eclogites and schists

Mixing properties of phengitic micas and revised garnet‐phengite thermobarometers. R. Coggon T. Holland. Geology. 2002; Mixing properties for muscovite–celadonite–ferroceladonite solid solutions are derived from combining available experimental phase equilibrium data with tabulated thermodynamic data for mineral …

Mixing properties of phengitic micas and revised …

Abstract. Mixing properties for muscovite–celadonite–ferroceladonite solid solutions are derived from combining available experimental phase equilibrium …

XMapTools: A MATLAB©-based program for electron

In the present contribution, we present a MATLAB ©-based Graphical User Interface (GUI) program named XMapTools that can be used to: (1) classify mineral phases in the sample, (2) convert X-ray intensities into calibrated weight percentages using Castaing's approach, (3) calculate the structural formulae of the identified minerals, (4) …

Geochemistry, Geophysics, Geosystems

Elastic thermobarometry can be used to constrain the pressure and temperature conditions of mineral crystallization by exploiting the difference in the elastic evolution of a mineral inclusion and its host …

Machine learning thermobarometry and chemometry using …

[Show full abstract] single-phase amphibole and clinopyroxene thermobarometers and chemometers, calibrated using machine learning. This approach allows us to intimately track the range of pre ...

FeMg partitioning between coexisting garnet and phengite …

Mixing properties of phengitic micas and revised garnet‐phengite thermobarometers. ... 2002; Mixing properties for muscovite–celadonite–ferroceladonite solid solutions are derived from combining available experimental phase equilibrium data with tabulated thermodynamic data for mineral … Expand. 804. Save. Precise revision of the garnet ...

TJBH Recent Papers

Mixing properties of phengitic micas and revised garnet-phengite thermobarometers. Journal of Metamorphic Geology, 20, 683-696. Holland, T.J.B. & Powell, R. 2003. Activity-composition relations for phases in petrological calculations: an asymmetric multicomponent formulation. Contributions to Mineralogy and Petrology, 145, 492-501.

Calcic amphibole thermobarometry in metamorphic and

Dependencies of plagioclase/amphibole Al-Si partitioning, D Al/Si plg/amp, and amphibole/liquid Mg partitioning, D Mg amp/liq, on temperature, pressure and phase compositions are investigated employing robust regression methods based on MM-estimators.A database with 92 amphibole-plagioclase pairs – temperature range: …

Thermodynamic properties of white micas on the basis of …

Mixing properties of phengitic micas and revised garnet‐phengite thermobarometers. R. Coggon T. Holland. Geology. 2002; Mixing properties for muscovite–celadonite–ferroceladonite solid solutions are derived from combining available experimental phase equilibrium data with tabulated thermodynamic data for mineral ...

Ternary-feldspar mixing relations and thermobarometry

thalpies of mixing (Hovis and Waldbaum, 1977). Their excess free energy ofmixing expressions incorporated the symmetric volume of mixing terms of Hovis (1977). Has-elton et al. (1983) also presented a two-feldspar "albite" geothermometer based on their revised analbite-sanidine mixing parameters, the Kerrick and Darken (1975) Al-