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page last updated: 28.11.2011

References

Below is a list of useful references regarding various aspects of using thermocalc. The list is divided into broad themes. Many papers occur in more than one group. The list, although extensive, is not complete. 

Internally-consistent thermodynamic datasets

Holland, TJB, & Powell, R, 1998. An internally-consistent thermodynamic dataset for phases of petrological interest. Journal of Metamorphic Geology 16, 309–344.

Holland, TJB, & Powell, R, 1990. An enlarged and updated internally consistent ther­modynamic dataset with uncertainties and correlations: the system K2O-Na2O-CaO-MgO­MnO-FeO-Fe2O3-Al2O3-TiO2-SiO2-C-H2-O2. Journal of Metamorphic Geology 8, 89–124.

Holland, TJB, & Powell, R, 1985. An internally consistent thermodynamic dataset with uncertainties and correlations : 2 : Data and results. Journal of Metamorphic Geology,  3, 343–370.

Powell, R, & Holland, TJB, 1985. An internally consistent thermodynamic dataset with uncertainties and correlations : 1 : Methods and a worked example. Journal of Metamorphic Geology 3, 327–342.

Thermocalc methodology

Powell, R. & Holland, T.J.B., 2008. On thermobarometry. Journal of Metamorphic Geology, 26, 155–179.

Powell, R, Holland, TJB, & Worley, B, 1998. Calculating phase diagrams involving solid solutions via non-linear equations, with examples using THERMOCALC Journal of Metamorphic Geology 16, 577–588.

Powell, R, & Holland, TJB, 1994. Optimal geothermometry and geobarometry. American Mineralogist 79, 120–133.

Powell, R, & Holland, TJB, 1993. Is Least Squares an appropriate methodology to be used in the extraction of thermodynamic data from experimentally-bracketed mineral equilibria? American Mineralogist, 78, 107–112.

Powell, R, & Holland, TJB, 1988 An internally consistent thermodynamic dataset with uncertainties and correlations: 3: application methods, worked examples and a computer program. Journal of Metamorphic Geology 6, 173–204.

Powell, R, & Holland, TJB, 1985. An internally consistent thermodynamic dataset with uncertainties and correlations : 1 : Methods and a worked example. Journal of Metamorphic Geology 3, 327–342.

Activity-composition relationships-methodologies

Holland, T.J.B. & Powell, R., 2006. Mineral activity-composition relations and petrological calculations involving cation equipartition in multisite minerals: a logical inconsistency. Journal of Metamorphic Geology 24, 851–861.

Powell, R, & Holland, TJB, 1999. Relating formulations of the thermodynamics of min­eral solid solutions: activity modelling of pyroxenes, amphiboles and micas. American Min­eralogist 84, 1–14.

Holland, TJB, & Powell, R, 1998. An internally-consistent thermodynamic dataset for phases of petrological interest. Journal of Metamorphic Geology 16, 309–344.

Holland, TJB, & Powell, R, 1996. Thermodynamics of order–disorder in minerals. 2: symmetric formalism applied to solid solutions. American Mineralogist 81, 1425–1437.

Holland, TJB, & Powell, R, 1996. Thermodynamics of order–disorder in minerals. 1: symmetric formalism applied to minerals of fixed composition. American Mineralogist 81, 1413–1424.

Powell, R, & Holland, TJB, 1993. On the formulation of simple mixing models for complex phases American Mineralogist 78, 1174–1180.

Powell, R, 1987 Darken’s quadratic formalism and the thermodynamics of minerals. Amer­ican Mineralogist 72, 1–11.

Activity-composition models

Green, ECR, Holland, TJB, & Powell, R, 2007. An order-disorder model for omphacitic pyroxenes in the system jadeite-diopside-hedenbergite-acmite, with applications to eclogitic rocks. American Mineralogist 92, 1181–1189.

Diener, J.F.A., Powell, R., White, R.W. & Holland, T.J.B., 2007. A new thermody­namic model for clino-and orthoamphiboles in Na2O-CaO-K2O-FeO-Fe2O3-MgO-Al2O3 ­SiO2-H2O (NCKFMASHO). Journal of Metamorphic Geology, 25, 631–656.

White, R.W., Powell, R. & Holland T.J.B., 2007. Progress relating to calculation of partial melting equilibria for metapelites. Journal of Metamorphic Geology, 25, 511–527.

Holland, T.J.B. & Powell, R., 2006. Mineral activity-composition relations and petrological calculations involving cation equipartition in multisite minerals: a logical inconsistency. Journal of Metamorphic Geology 24, 851–861.

Evans, K, & Powell, R, 2006. The thermodynamics of mixing in saline and mixed solvent solutions at elevated temperature and pressure: A framework for geological phase equilibria calculations. Geochimica et Cosmochimica Acta 70, 5488–5506.

Dale, J., Powell, R., White, R.W. & Elmer, F.L. 2005. A thermodynamic model for clinoamphiboles in Na2O-CaO-K2O-FeO-Fe2O3-MgO-Al2O3-SiO2-H2O (NCKFMASHO). Journal of Metamorphic Geology, 23, 771–791.

White, R.W., Pomroy, N.E. & Powell, R. 2005. An in-situ metatexite-diatexite transition in upper amphibolite facies rocks from Broken Hill, Australia. Journal of Metamorphic Geology, 23, 579–602.

Kelsey, DE, White, RW, Holland, TJB, & Powell, R, 2004. Calculated phase equilib­ria in K2O-FeO-MgO-Al2O3-SiO2-H2O for sapphirine-quartz-bearing mineral assemblages. Journal of Metamorphic Geology 22, 559–578.

White, RW, Powell, R, & Clarke, GL, 2003.Partial melting at low pressures: migmatites from Mt Stafford, central Australia. Journal of Petrology, 44, 1937–1960.

Coggon, R. & Holland, T.J.B., 2002. Mixing properties of phengitic micas and revised garnet-phengite thermobarometers. Journal of Metamorphic Geology, 20, 683--696.

White, R.W., Powell, R. & Clarke, G.L., 2002. The interpretation of reaction tex­tures in Fe-rich metapelitic granulites of the Musgrave Block, central Australia: Constraints from mineral equilibria calculations in the system K2O–FeO–MgO–Al2O3–SiO2–H2O–TiO2–Fe2O3. Journal of Metamorphic Geology 20, 41–55.

Holland, TJB, & Powell, R, 2001. Calculation of phase relations involving haplogranitic melts using an internally-consistent thermodynamic dataset Journal of Petrology 42, 673–683.

White, RW, Powell, R, & Holland, TJB, 2001. Calculation of partial melting equilibria in the system CaO–Na2O–K2O–FeO-MgO-Al2O3–SiO2–H2O (CNKFMASH). Journal of Metamorphic Geology, 19, 139–153.

White, RW, Powell, R, Holland, TJB, & Worley, B, 2000. The effect of TiO2 and Fe2O3 on metapelitic assemblages at greenschist and amphibolite facies conditions: mineral equi­libria calculations in the system K2O–FeO–MgO–Al2O3–SiO2–H2O–TiO2–Fe2O3. Journal of Metamorphic Geology, 18, 497–511.

Powell, R, & Holland, TJB, 1999. Relating formulations of the thermodynamics of min­eral solid solutions: activity modelling of pyroxenes, amphiboles and micas. American Mineralogist 84, 1–14.

Powell, R, Holland, TJB, & Worley, B, 1998. Calculating phase diagrams involving solid solutions via non-linear equations, with examples using THERMOCALC Journal of Metamorphic Geology 16, 577–588.

Holland, TJB, Baker, J, & Powell, R, 1998. Mixing properties and activity–composition relationships of chlorites in the system MgO–Al2O3–SiO2–H2O. European Journal of Mineralogy, 10, 395–406.

Holland, TJB, & Powell, R, 1998. An internally-consistent thermodynamic dataset for phases of petrological interest. Journal of Metamorphic Geology 16, 309–344.

Worley, B, & Powell, R, 1998. Singularities in the system Na2O–CaO–K2O–MgO–FeO– Al2O3–SiO2–H2O. Journal of Metamorphic Geology 16, 169–188.

Holland, TJB, & Powell, R, 1996. Thermodynamics of order–disorder in minerals. 2: symmetric formalism applied to solid solutions. American Mineralogist 81, 1425–1437.

Holland, TJB, & Powell, R, 1996. Thermodynamics of order–disorder in minerals. 1: symmetric formalism applied to minerals of fixed composition. American Mineralogist 81, 1413–1424.

Holland, T.J.B., Babu, E.V.S.S.K, & Waters, D.J., 1996. Phase relations of Osumilite and dehydration melting in pelitic rocks: a simple thermodynamic model for the KFMASH system. Contributions to Mineralogy and Petrology, 124, 383–394.

Powell, R, & Holland, TJB, 1993. On the formulation of simple mixing models for complex phases American Mineralogist 78, 1174–1180.

Will, TM, & Powell, R, 1992 Activity-composition relationships in multi-component am­phiboles: an application of DQF, American Mineralogist, 77, 954–966.

Holland, TJB, & Powell, R, 1991 COmpensated Redlich-Kwong (CORK) fugacity equations for H20 and CO2. Contributions to Mineralogy and Petrology 109, 265–273.

Metapelites & quartzofeldspathic rocks

Diener, J.F.A., White, R.W., & Powell, R., 2008. Granulite facies metamorphism and subsolidus fluid-absent reworking, Strangways Range, Arunta Block, central Australia. Journal of Metamorphic Geology, 26, 603-622.

Indares A., White, R.W. & Powell, R., 2008 Phase equilibria modelling of kyanite-bearing anatectic metapelites: examples from the central Grenville Province. Journal of Metamorphic Geology, 26, 815-836.

Johnson T.E., White, R.W. & Powell, R., 2008 Partial melting of metagreywackes: a calculated mineral equilibria study. Journal of Metamorphic Geology, 26, 837-853.

Vry, J, Powell & Williams, J. Establishing the P -T path for Alpine Schist near Hokitika, Southern Alps, New Zealand. Journal of Metamorphic Geology, 26, 81–97.

Hasalová, P, Stípská, P  Powell, R, Schulmann, K, Janoušek, V, & Lexa, O. 2008. Transforming mylonitic metagranite by open-system interactions during melt flow. Journal of Metamor­phic Geology 26, 55–80.

Phillips, G., White, R.W. & Wilson, C.J.L. , 2007. The roles of deformation and fluid dur­ing orogenesis within a polymetamorphic terrane: Inferences on the geodynamic evolution of the Ruker Province, east Antarctica. Journal of Metamorphic Geology, 25, 855–871.

Halpin J.A, Clarke, G.L., White, R.W. & Kelsey, D.E., 2007. Contrasting P-T-t paths for Neoproterozoic metamorphism in MacRobertson and Kemp Lands, east Antarctica. Journal of Metamorphic Geology, 25, 683–701.

Halpin J.A, White, R.W., Clarke, G.L. & Kelsey, D.E., 2007. The Proterozoic P-T evo­lution of the Kemp Land Coast, East Antarctica: constraints from Si-saturated and Si-undersaturated metapelites. Journal of Petrology, 48, 1321–1349.

White, R.W., Powell, R. & Holland T.J.B., 2007. Progress relating to calculation of partial melting equilibria for metapelites. Journal of Metamorphic Geology, 25, 511–527.

Clarke, G.L., White, R.W. Lui, S. Fitzherbert, J.A. & Pearson, N.J., 2007 Decoupling of rare earth and major element partitioning in granulite facies migmatites, Wuluma Hills, Arunta Block, central Australia. Journal of Metamorphic Geology, 25, 1–18.

Hollis, J.A, Harley, S.L., White, R.W. & Clarke, G.L. 2006. Constraints on high pressure-temperature metamorphism of the Roineabhal terrane, south Harris, Scotland, from orthopyroxene-kyanite-bearing rocks. Journal of Metamorphic Geology, 24, 263–279.

Baldwin, J, Powell, R, Brown, M, Moraes, R, & Fuck, RA, 2005. Modelling of mineral equilibria in ultrahigh-temperature metamorphic rocks from the Anapolis-Itaucu Complex, central Brazil. Journal of Metamorphic Geology 23, 511-531.

Kelsey, D.E., White, R.W., & Powell, R., 2005. Calculated phase equilibria in K2O-FeO­MgO-Al2O3-SiO2-H2O for silica-undersaturated sapphirine-bearing mineral assemblages. Journal of Metamorphic Geology, 23, 217–239.

Powell, R. Guiraud, M. & White, R.W., 2005. Truth and beauty in metamorphic mineral equilibria: conjugate variables and phase diagrams. Canadian Mineralogist, 43, 21-33.

White, R.W., Powell, R., & Halpin, J.A., 2004. Spatially-focussed melt formation in aluminous metapelites from Broken Hill, Australia. Journal of Metamorphic Geology, 22, 825–845.

Kelsey, DE, White, RW, Holland, TJB, & Powell, R, 2004. Calculated phase equilib­ria in K2O-FeO-MgO-Al2O3-SiO2-H2O for sapphirine-quartz-bearing mineral assemblages. Journal of Metamorphic Geology 22, 559–578.

Wei, CJ, Powell, R, & Clarke, GL, Calculated phase equilibria for low and medium pressure metapelites in the KFMASH and KMnFMASH systems. Journal of Metamorphic Geology, 22, 495-508.

Wei, CJ, & Powell, R, 2004. Calculated phase relations in high-pressure metapelites in the system NKFMASH (Na2O-K2O-FeO-MgO-Al2O3-SiO2-H2O) with application to natural rocks. Journal of Petrology, 45, 183–202.

Kelsey, DE, White, RW, Powell, R, Wilson, CJLW, Quinn, CD, 2003. A re-evaluation of metamorphism in the Rauer Group, Prydz Bay, east Antarctica. Journal of Metamorphic Geology, 21, 739–831.

White, RW, Powell, R, & Clarke, GL, 2003.Partial melting at low pressures: migmatites from Mt Stafford, central Australia. Journal of Petrology, 44, 1937–1960.

Kelsey, DE, White, RW, & Powell, R, 2003. Orthopyroxene-sillimanite-quartz assem­blages: distribution, petrology and quantitative P-T-X constraints. Journal of Metamorphic Geology 21, 439–454.

White, RW, & Powell, R 2002. Melt loss and the preservation of granulite facies mineral assemblages. Journal of Metamorphic Geology 20, 621–632.

White, R.W., Powell, R. & Clarke, G.L., 2002. The interpretation of reaction tex­tures in Fe-rich metapelitic granulites of the Musgrave Block, central Australia: Constraints from mineral equilibria calculations in the system K2O–FeO–MgO–Al2O3–SiO2–H2O–TiO2–Fe2O3. Journal of Metamorphic Geology 20, 41–55.

Guiraud, M, Powell, R, & Rebay, G, 2001. H2O in metamorphism and unexpected behaviour in the preservation of metamorphic mineral assemblages, Journal of Metamorphic Geology 19, 445–454.

White, RW, Powell, R, & Holland, TJB, 2001. Calculation of partial melting equilibria in the system CaO–Na2O–K2O–FeO-MgO-Al2O3–SiO2–H2O (CNKFMASH). Journal of Metamorphic Geology, 19, 139–153.

White, RW, Powell, R, Holland, TJB, & Worley, B, 2000. The effect of TiO2 and Fe2O3 on metapelitic assemblages at greenschist and amphibolite facies conditions: mineral equilibria calculations in the system K2O–FeO–MgO–Al2O3–SiO2–H2O–TiO2–Fe2O3. Journal of Metamorphic Geology, 18, 497–511.

Powell, R, Holland, TJB, & Worley, B, 1998. Calculating phase diagrams involving solid solutions via non-linear equations, with examples using THERMOCALC Journal of Metamorphic Geology 16, 577–588.

Worley, B, & Powell, R, 1998. Making movies: phase diagrams in temperature, pressure, composition and time. In What drives metamorphism and metamorphic reactions eds PJ Treloar and P O’Brien. Geological Society of London, Special Publications, 138, 263–274.

Worley, B, & Powell, R, 1998. Singularities in the system Na2O–CaO–K2O–MgO–FeO– Al2O3–SiO2–H2O. Journal of Metamorphic Geology 16, 169–188.

Stüwe, K, & Powell, R, 1995. PT paths from modal proportions. Application to the Koralm Complex, Eastern Alps. Contributions to Mineralogy and Petrology 119, 83–93.

Xu, G, Powell, R, Wilson CJL, & Will, TM, 1994. Contact metamorphism associated with the Stawell granite, Victoria, Australia, Journal of Metamorphic Geology, 12, 601–624.

Xu, G, Will, TM, & Powell, R, 1994. A calculated petrogenetic grid for rocks in the system K20-Fe0-Mg0-Al2O3-SiO2-H20, with particular reference to contact metamorphosed pelites. Journal of Metamorphic Petrology 12, 99–119.

Powell, R, & Holland, TJB, 1990 Calculated mineral equilibria in the pelite system. KFMASH (K20-FeO-MgO-Al2O3-SiO2-H20). American Mineralogist 75, 367–380.

Metabasic and intermediate rocks

Yang, J.J. & Powell, R., 2008.  Ultrahigh-pressure garnet peridotites from the devolatilization of sea-floor hydrated ultramafic rocks. Journal of Metamorphic Geology, 26, 695-716.

Racek, M, Stípská, P, & Powell, R. 2008 Garnet-clinopyroxene intermediate granulites in the St. Leonhard massif of the Bohemian Massif: ultrahigh temperature metamorphism at high pressure? Journal of Metamorphic Geology, 26, 253-271.

Baldwin, JA, Powell, R, Williams, ML, & Goncalves, P., 2007. Formation of eclogite, and reaction during exhumation to mid-crustal levels, Snowbird tectonic zone, western Canadian Shield. Journal of Metamorphic Geology, 25, 953–974.

Phillips, G., White, R.W. & Wilson, C.J.L., 2007. The roles of deformation and fluid dur­ing orogenesis within a polymetamorphic terrane: Inferences on the geodynamic evolution of the Ruker Province, east Antarctica. Journal of Metamorphic Geology, 25, 855–871.

Elmer, F. L., Powell, R.,White, R.W. & Phillips, G. N., 2007. Timing of gold mineral­ization relative to the peak of metamorphism at Bronzewing, Western Australia. Economic Geology. 102, 379–392.

Diener, J.F.A., Powell, R., White, R.W. & Holland, T.J.B., 2007. A new thermody­namic model for clino-and orthoamphiboles in Na2O-CaO-K2O-FeO-Fe2O3-MgO-Al2O3 ­SiO2-H2O (NCKFMASHO). Journal of Metamorphic Geology, 25, 631–656.

Yang, J-J, & Powell, R, 2006. Calculated phase relations for UHP eclogites and whiteschists in the system Na2O-CaO-K2O-FeO-MgO-Al2O3-SiO2-H2O. Journal of Petrology 47, 2047–2071.

Clarke, GL, Powell, R & Fitzherbert, JA, 2006. The lawsonite paradox: mineral equilibria modelling in the system Na2O-CaO-K2O-FeO-MgO-Al2O3-SiO2-H2O. Journal of Metamorphic Geology 24, 715–725.

Elmer, F.L., White, R.W. & Powell, R., 2006. Devolatilisation of metabasic rocks during greenschist-amphibolite facies metamorphism. Journal of Metamorphic Geology, 24, 497–513.

Dale, J., Powell, R., White, R.W. & Elmer, F.L. 2005. A thermodynamic model for clinoamphiboles in Na2O-CaO-K2O-FeO-Fe2O3-MgO-Al2O3-SiO2-H2O (NCKFMASHO). Journal of Metamorphic Geology, 23, 771–791.

Štípská, P, & Powell, R, 2005. Constraining the PT path of a MORB-type eclogite using pseudosections, garnet zoning and garnet-clinopyroxene thermometry: an example from the Bohemian Massif. Journal of Metamorphic Geology 23, 725-743.

Fitzherbert, JA, Clarke, GL, & Powell, R, 2003. Lawsonite-omphacite bearing metab­asites of the Pam Peninsula, NE New Caledonia: evidence for a disrupted blueschist to eclogite facies crustal profile. Journal of Petrology 44, 1805–1831.

White, RW, Powell, R, & Phillips, GN, 2003. Fluid alteration in mafic greenschist facies rocks: mineral equilibria calculations and comparison with rocks from Kalgoorlie, Western Australia. Journal of Metamorphic Geology 21, 455–468.

Wei, CJ, Powell, R, & Zhang, LF, 2003. Calculated mineral equilibria for eclogites from the south Tianshan, NW China. Journal of Metamorphic Geology 21, 163–180.

Rebay, G, & Powell, R, 2002. The formation of eclogite facies metatroctolites and a general petrogenetic grid in Na2O-CaO-FeO-MgO-Al2O3-SiO2-H2O (NCFMASH) Journal of Metamorphic Geology 20, 813–826.

Marmo, B, Clarke, G.L., & Powell, R, 2002. Fractionation of bulk rock composition due to porphyroblast growth: effects on eclogite facies mineral equilibria, Pam Peninsula, New Caledonia. Journal of Metamorphic Geology 20, 151–165.

Guiraud, M, Powell, R, & Rebay, G, 2001. H2O in metamorphism and unexpected behaviour in the preservation of metamorphic mineral assemblages, Journal of Metamorphic Geology 19, 445–454.

Carson, CJ, Clarke, GL, & Powell, R, 2000. Hydration of eclogite from the Pam Penin­sula, New Caledonia. Journal of Metamorphic Geology 18, 79–90.

Carson, CJ, Powell, R, & Clarke, GL, 1999. Calculated mineral equilibria for eclog­ites in CaO–Na2O–FeO–MgO–Al2O3–SiO2–H2O: application to the Pouébo Terrane, Pam Peninsula, New Caledonia. Journal of Metamorphic Geology 17, 9–24.

Powell, R, Will, TM, & Phillips, GN, 1991 Metamorphism in Archaean greenstone belts: calculated fluid compositions and implications for gold mineralisation. Journal of Metamorphic Geology 9, 141–150.

Will, TM, Powell, R, & Holland, TJB, 1990 A calculated petrogenetic grid for ultramafic rocks in the system CaO-FeO-MgO-Al2O3-SiO2-CO2-H2O at low pressures. Contributions to Mineralogy and Petrology 105, 347–358.

Will, TM, Powell, R, Holland TJB, & Guiraud, M, 1990 Calculated greenschist facies mineral equilibria in the system CaO-FeO-MgO-Al2O3-SiO2-CO2-H2O, Contributions to Mineralogy and Petrology 104, 353–368.

Guiraud, M, Holland, TJB, & Powell, R, 1990 Calculated mineral equilibria in the green-schist -blueschist -eclogite facies in Na2O-FeO-MgO-Al2O3-SiO2-H2O: methods, results and geological applications. Contributions to Mineralogy and Petrology 104, 85–98.

Cordierite-orthoamphibole gneisses, siliceous dolomites and other rock compositions

Diener, J.F.A., Powell, R., & White, R.W., 2008 Quantitative phase petrology of cordierite-orthoamphibole gneisses and related rocks.  Journal of Metamorphic Geology, 26, 795-814.

Yang, J-J, & Powell, R, 2006. Calculated phase relations for UHP eclogites and whiteschists in the system Na2O-CaO-K2O-FeO-MgO-Al2O3-SiO2-H2O. Journal of Petrology 47, 2047–2071.

Arnold, J, Powell, R, & Sandiford, M, 2000. Amphibolites with staurolite and other aluminous minerals: calculated mineral equilibria in NCFMASH. Journal of Metamorphic Geology, 18, 23–40.

Guiraud, M, Powell, R, & Cottin, JY, 1996. Hydration of orthopyroxene-cordierite-bearing assemblages at Laouni, Central Hoggar, Algeria. Journal of Metamorphic Geology, 14, 467–476.

Baker, J, Holland, TJB, & Powell, R, 1994. The effect of Tschermak solid solutions on assemblages in aluminous dolomites. Contributions to Mineralogy and Petrology, 118, 48–59.

Will, TM, & Powell, R, 1992 Activity-composition relationships in multi-component am­phiboles: an application of DQF, American Mineralogist, 77, 954–966.

Fluid-rock relationships and aqueous solutions

Yang, J.J. & Powell, R., 2008.  Ultrahigh-pressure garnet peridotites from the devolatilization of sea-floor hydrated ultramafic rocks. Journal of Metamorphic Geology, 26, 695-716.

Phillips, G., White, R.W. & Wilson, C.J.L., 2007. The roles of deformation and fluid dur­ing orogenesis within a polymetamorphic terrane: Inferences on the geodynamic evolution of the Ruker Province, east Antarctica. Journal of Metamorphic Geology, 25, 855–871.

Elmer, F. L., Powell, R.,White, R.W. & Phillips, G. N., 2007. Timing of gold mineralization relative to the peak of metamorphism at Bronzewing, Western Australia. Economic Geology. 102, 379–392.

Evans, K, & Powell, R, 2007. DES-code: a metacode to aid calculation of the chemi­cal potential of aqueous solutions at elevated temperatures and pressures. Computers and Geoscience 33, 789–807.

Evans, K, & Powell, R, 2006. The thermodynamics of mixing in saline and mixed solvent solutions at elevated temperature and pressure: A framework for geological phase equilibria calculations. Geochimica et Cosmochimica Acta 70, 5488–5506.

Clarke, GL, Powell, R & Fitzherbert, JA, 2006. The lawsonite paradox: mineral equilibria modelling in the system Na2O-CaO-K2O-FeO-MgO-Al2O3-SiO2-H2O. Journal of Metamorphic Geology 24, 715–725.

Elmer, F.L., White, R.W. & Powell, R., 2006. Devolatilisation of metabasic rocks during greenschist-amphibolite facies metamorphism. Journal of Metamorphic Geology, 24, 497–513.

White, RW, Powell, R, & Phillips, GN, 2003. Fluid alteration in mafic greenschist facies rocks: mineral equilibria calculations and comparison with rocks from Kalgoorlie, Western Australia. Journal of Metamorphic Geology 21, 455–468.

Guiraud, M, Powell, R, & Rebay, G, 2001. H2O in metamorphism and unexpected behaviour in the preservation of metamorphic mineral assemblages, Journal of Metamorphic Geology 19, 445–454.

Carson, CJ, Clarke, GL, & Powell, R, 2000. Hydration of eclogite from the Pam Penin­sula, New Caledonia. Journal of Metamorphic Geology 18, 79–90.

Guiraud, M, Powell, R, & Cottin, JY, 1996. Hydration of orthopyroxene-cordierite-bearing assemblages at Laouni, Central Hoggar, Algeria. Journal of Metamorphic Geology, 14, 467–476.

Baker, J, Holland, TJB, & Powell, R, 1994. The effect of Tschermak solid solutions on assemblages in aluminous dolomites. Contributions to Mineralogy and Petrology, 118, 48–59.

Powell, R, Will, TM, & Phillips, GN, 1991 Metamorphism in Archaean greenstone belts: calculated fluid compositions and implications for gold mineralisation. Journal of Metamorphic Geology 9, 141–150.

Will, TM, Powell, R, & Holland, TJB, 1990 A calculated petrogenetic grid for ultramafic rocks in the system CaO-FeO-MgO-Al2O3-SiO2-CO2-H2O at low pressures. Contributions to Mineralogy and Petrology 105, 347–358.

Baker, J, Holland, TJB, & Powell, R 1990 Internal buffering in systems with phases which are not solid solutions. Contributions to Mineralogy and Petrology 106, 170–182.

Greenschist and amphibolite facies rocks

Diener, J.F.A., Powell, R., & White, R.W., 2008 Quantitative phase petrology of cordierite-orthoamphibole gneisses and related rocks.  Journal of Metamorphic Geology, 26, 795-814.

White, R.W., Powell, R. & Baldwin J.A., 2008. Calculated phase equilibria involving chemical potentials to investigate the textural evolution of metamorphic rocks. Journal of Metamorphic Geology, 26, 181–198.

Vry, J, Powell & Williams, J. Establishing the P -T path for Alpine Schist near Hokitika, Southern Alps, New Zealand. Journal of Metamorphic Geology, 26, 81–97.

Phillips, G., White, R.W. & Wilson, C.J.L., 2007. The roles of deformation and fluid dur­ing orogenesis within a polymetamorphic terrane: Inferences on the geodynamic evolution of the Ruker Province, east Antarctica. Journal of Metamorphic Geology, 25, 855–871.

Elmer, F. L., Powell, R.,White, R.W. & Phillips, G. N., 2007. Timing of gold mineral­ization relative to the peak of metamorphism at Bronzewing, Western Australia. Economic Geology. 102, 379–392.

Diener, J.F.A., Powell, R., White, R.W. & Holland, T.J.B., 2007. A new thermody­namic model for clino-and orthoamphiboles in Na2O-CaO-K2O-FeO-Fe2O3-MgO-Al2O3 ­SiO2-H2O (NCKFMASHO). Journal of Metamorphic Geology, 25, 631–656.

Elmer, F.L., White, R.W. & Powell, R., 2006. Devolatilisation of metabasic rocks during greenschist-amphibolite facies metamorphism. Journal of Metamorphic Geology, 24, 497–513.

Kuhn, BK, Reusser, E, Powell, R & Gunther, D, 2005. Metamorphic evolution of calc-schists in the Central Alps, Switzerland. Schweizerische Mineralogische und Petrographische Mitteilungen 85, 175–190.

Dale, J., Powell, R., White, R.W. & Elmer, F.L. 2005. A thermodynamic model for clinoamphiboles in Na2O-CaO-K2O-FeO-Fe2O3-MgO-Al2O3-SiO2-H2O (NCKFMASHO). Journal of Metamorphic Geology, 23, 771–791.

White, R.W., Pomroy, N.E. & Powell, R. 2005. An in-situ metatexite-diatexite transition in upper amphibolite facies rocks from Broken Hill, Australia. Journal of Metamorphic Geology, 23, 579–602.

Wei, CJ, Powell, R, & Clarke, GL, Calculated phase equilibria for low and medium pressure metapelites in the KFMASH and KMnFMASH systems. Journal of Metamorphic Geology, 22, 495-508.

White, RW, Powell, R, & Phillips, GN, 2003. Fluid alteration in mafic greenschist facies rocks: mineral equilibria calculations and comparison with rocks from Kalgoorlie, Western Australia. Journal of Metamorphic Geology 21, 455–468.

Guiraud, M, Powell, R, & Rebay, G, 2001. H2O in metamorphism and unexpected behaviour in the preservation of metamorphic mineral assemblages, Journal of Metamorphic Geology 19, 445–454.

White, RW, Powell, R, Holland, TJB, & Worley, B, 2000. The effect of TiO2 and Fe2O3 on metapelitic assemblages at greenschist and amphibolite facies conditions: mineral equi­libria calculations in the system K2O–FeO–MgO–Al2O3–SiO2–H2O–TiO2–Fe2O3. Journal of Metamorphic Geology, 18, 497–511.

Arnold, J, Powell, R, & Sandiford, M, 2000. Amphibolites with staurolite and other aluminous minerals: calculated mineral equilibria in NCFMASH. Journal of Metamorphic Geology, 18, 23–40.

Powell, R, Holland, TJB, & Worley, B, 1998. Calculating phase diagrams involving solid solutions via non-linear equations, with examples using THERMOCALC Journal of Metamorphic Geology 16, 577–588.

Worley, B, & Powell, R, 1998. Making movies: phase diagrams in temperature, pressure, composition and time. In What drives metamorphism and metamorphic reactions eds PJ Treloar and P O’Brien. Geological Society of London, Special Publications, 138, 263–274.

Guiraud, M, Powell, R, & Cottin, JY, 1996. Hydration of orthopyroxene-cordierite-bearing assemblages at Laouni, Central Hoggar, Algeria. Journal of Metamorphic Geology, 14, 467–476.

Stüwe, K, & Powell, R, 1995. PT paths from modal proportions. Application to the Koralm Complex, Eastern Alps. Contributions to Mineralogy and Petrology 119, 83–93.

Xu, G, Powell, R, Wilson CJL, & Will, TM, 1994. Contact metamorphism associated with the Stawell granite, Victoria, Australia, Journal of Metamorphic Geology, 12, 601–624.

Xu, G, Will, TM, & Powell, R, 1994. A calculated petrogenetic grid for rocks in the system K20-Fe0-Mg0-Al2O3-SiO2-H20, with particular reference to contact metamorphosed pelites. Journal of Metamorphic Petrology 12, 99–119.

Will, TM, & Powell, R, 1992 Activity-composition relationships in multi-component am­phiboles: an application of DQF, American Mineralogist, 77, 954–966.

Powell, R, Will, TM, & Phillips, GN, 1991 Metamorphism in Archaean greenstone belts: calculated fluid compositions and implications for gold mineralisation. Journal of Metamorphic Geology 9, 141–150.

Baker, J, Holland, TJB, & Powell, R 1990 Internal buffering in systems with phases which are not solid solutions. Contributions to Mineralogy and Petrology 106, 170–182.

Powell, R, & Holland, TJB, 1990 Calculated mineral equilibria in the pelite system. KFMASH (K20-FeO-MgO-Al2O3-SiO2-H20). American Mineralogist 75, 367–380.

Will, TM, Powell, R, Holland TJB, & Guiraud, M, 1990 Calculated greenschist facies mineral equilibria in the system CaO-FeO-MgO-Al2O3-SiO2-CO2-H2O, Contributions to Mineralogy and Petrology 104, 353–368.

Granulite facies rocks melting and migmatites

Johnson T.E., White, R.W. & Powell, R., 2008 Partial melting of metagreywackes: a calculated mineral equilibria study. Journal of Metamorphic Geology, 26, 837-853.

Indares A., White, R.W. & Powell, R., 2008 Phase equilibria modelling of kyanite-bearing anatectic metapelites: examples from the central Grenville Province. Journal of Metamorphic Geology, 26, 815-836.

White, R.W., 2008.  Insights gained from the petrological modelling of migmatites: particular reference to mineral assemblages and common replacement textures. Mineralogical Association of Canada, short course notes, 38, 77-93.

Stipska, P., Schulmann, K. & Powell, R., 2008. Contrasting metamorphic histories of lenses of high-pressure rocks and host migmatites with a flat orogenic fabric (Bohemian Massif, Czech Republic): a result of tectonic mixing within horizontal crustal flow? Journal of Metamorphic Geology, 26, 623-646.

Racek, M, Stípská, P, & Powell, R. 2008 Garnet-clinopyroxene intermediate granulites in the St. Leonhard massif of the Bohemian Massif: ultrahigh temperature metamorphism at high pressure? Journal of Metamorphic Geology, 26, 253-271.

White, R.W., Powell, R. & Baldwin J.A., 2008. Calculated phase equilibria involving chemical potentials to investigate the textural evolution of metamorphic rocks. Journal of Metamorphic Geology, 26, 181–198.

Hasalová, P, Stípská, P  Powell, R, Schulmann, K, Janoušek, V, & Lexa, O. 2008. Transforming mylonitic metagranite by open-system interactions during melt flow. Journal of Metamor­phic Geology 26, 55–80.

Halpin J.A, Clarke, G.L., White, R.W. & Kelsey, D.E., 2007. Contrasting P-T-t paths for Neoproterozoic metamorphism in MacRobertson and Kemp Lands, east Antarctica. Journal of Metamorphic Geology, 25, 683–701.

Halpin J.A, White, R.W., Clarke, G.L. & Kelsey, D.E., 2007. The Proterozoic P-T evo­lution of the Kemp Land Coast, East Antarctica: constraints from Si-saturated and Si-undersaturated metapelites. Journal of Petrology, 48, 1321–1349.

White, R.W., Powell, R. & Holland T.J.B., 2007. Progress relating to calculation of partial melting equilibria for metapelites. Journal of Metamorphic Geology, 25, 511–527.

Clarke, G.L., White, R.W. Lui, S. Fitzherbert, J.A. & Pearson, N.J., 2007 Decoupling of rare earth and major element partitioning in granulite facies migmatites, Wuluma Hills, Arunta Block, central Australia. Journal of Metamorphic Geology, 25, 1–18.

Hollis, J.A, Harley, S.L., White, R.W. & Clarke, G.L. 2006. Constraints on high pressure-temperature metamorphism of the Roineabhal terrane, south Harris, Scotland, from orthopyroxene-kyanite-bearing rocks. Journal of Metamorphic Geology, 24, 263–279.

Stípská, P, & Powell, R, 2005. Does ternary feldspar constrain the metamorphic conditions of high grade meta-igneous rocks? Evidence from orthopyroxene gneisses, Bohemian massif. Journal of Metamorphic Geology 23, 627-647.

White, R.W., Pomroy, N.E. & Powell, R. 2005. An in-situ metatexite-diatexite transition in upper amphibolite facies rocks from Broken Hill, Australia. Journal of Metamorphic Geology, 23, 579–602.

Baldwin, J, Powell, R, Brown, M, Moraes, R, & Fuck, RA, 2005. Modelling of mineral equilibria in ultrahigh-temperature metamorphic rocks from the Anapolis-Itaucu Complex, central Brazil. Journal of Metamorphic Geology 23, 511-531.

Kelsey, D.E., White, R.W., & Powell, R., 2005. Calculated phase equilibria in K2O-FeO­MgO-Al2O3-SiO2-H2O for silica-undersaturated sapphirine-bearing mineral assemblages. Journal of Metamorphic Geology, 23, 217–239.

Powell, R. Guiraud, M. & White, R.W., 2005. Truth and beauty in metamorphic mineral equilibria: conjugate variables and phase diagrams. Canadian Mineralogist, 43, 21-33.

White, R.W., Powell, R., & Halpin, J.A., 2004. Spatially-focussed melt formation in aluminous metapelites from Broken Hill, Australia. Journal of Metamorphic Geology, 22, 825–845.

Kelsey, DE, White, RW, Holland, TJB, & Powell, R, 2004. Calculated phase equilib­ria in K2O-FeO-MgO-Al2O3-SiO2-H2O for sapphirine-quartz-bearing mineral assemblages. Journal of Metamorphic Geology 22, 559–578.

Kelsey, DE, White, RW, Powell, R, Wilson, CJLW, Quinn, CD, 2003. A re-evaluation of metamorphism in the Rauer Group, Prydz Bay, east Antarctica. Journal of Metamorphic Geology, 21, 739–831.

White, RW, Powell, R, & Clarke, GL, 2003.Partial melting at low pressures: migmatites from Mt Stafford, central Australia. Journal of Petrology, 44, 1937–1960.

Kelsey, DE, White, RW, & Powell, R, 2003. Orthopyroxene-sillimanite-quartz assem­blages: distribution, petrology and quantitative P-T-X constraints. Journal of Metamorphic Geology 21, 439–454.

White, RW, & Powell, R 2002. Melt loss and the preservation of granulite facies mineral assemblages. Journal of Metamorphic Geology 20, 621–632.

White, R.W., Powell, R. & Clarke, G.L., 2002. The interpretation of reaction tex­tures in Fe-rich metapelitic granulites of the Musgrave Block, central Australia: Con­straints from mineral equilibria calculations in the system K2O–FeO–MgO–Al2O3–SiO2–H2O–TiO2–Fe2O3. Journal of Metamorphic Geology 20, 41–55.

Holland, TJB, & Powell, R, 2001. Calculation of phase relations involving haplogranitic melts using an internally-consistent thermodynamic dataset Journal of Petrology 42, 673–683.

White, RW, Powell, R, & Holland, TJB, 2001. Calculation of partial melting equilibria in the system CaO–Na2O–K2O–FeO-MgO-Al2O3–SiO2–H2O (CNKFMASH). Journal of Metamorphic Geology, 19, 139–153.

Guiraud, M, Powell, R, & Cottin, JY, 1996. Hydration of orthopyroxene-cordierite-bearing assemblages at Laouni, Central Hoggar, Algeria. Journal of Metamorphic Geology, 14, 467–476.

Baker, J, Holland, TJB, & Powell, R, 1994. The effect of Tschermak solid solutions on assemblages in aluminous dolomites. Contributions to Mineralogy and Petrology, 118, 48–59.

Blueschist & eclogite facies rocks

Hasalová, P, Stípská, P  Powell, R, Schulmann, K, Janoušek, V, & Lexa, O. 2008. Transforming mylonitic metagranite by open-system interactions during melt flow. Journal of Metamor­phic Geology 26, 55–80.

Yang, J-J, & Powell, R, 2006. Calculated phase relations for UHP eclogites and whiteschists in the system Na2O-CaO-K2O-FeO-MgO-Al2O3-SiO2-H2O. Journal of Petrology 47, 2047–2071.

Clarke, GL, Powell, R & Fitzherbert, JA, 2006. The lawsonite paradox: mineral equilibria modelling in the system Na2O-CaO-K2O-FeO-MgO-Al2O3-SiO2-H2O. Journal of Metamorphic Geology 24, 715–725.

Stípská, P, & Powell, R, 2005. Constraining the PT path of a MORB-type eclogite using pseudosections, garnet zoning and garnet-clinopyroxene thermometry: an example from the Bohemian Massif. Journal of Metamorphic Geology 23, 725-743.

Wei, CJ, & Powell, R, 2004. Calculated phase relations in high-pressure metapelites in the system NKFMASH (Na2O-K2O-FeO-MgO-Al2O3-SiO2-H2O) with application to natural rocks. Journal of Petrology, 45, 183–202.

Fitzherbert, JA, Clarke, GL, & Powell, R, 2003. Lawsonite-omphacite bearing metab­asites of the Pam Peninsula, NE New Caledonia: evidence for a disrupted blueschist to eclogite facies crustal profile. Journal of Petrology 44, 1805–1831.

Wei, CJ, Powell, R, & Zhang, LF, 2003. Calculated mineral equilibria for eclogites from the south Tianshan, NW China. Journal of Metamorphic Geology 21, 163–180.

Rebay, G, & Powell, R, 2002. The formation of eclogite facies metatroctolites and a general petrogenetic grid in Na2O-CaO-FeO-MgO-Al2O3-SiO2-H2O (NCFMASH) Journal of Metamorphic Geology 20, 813–826.

Marmo, B, Clarke, G.L., & Powell, R, 2002. Fractionation of bulk rock composition due to porphyroblast growth: effects on eclogite facies mineral equilibria, Pam Peninsula, New Caledonia. Journal of Metamorphic Geology 20, 151–165.

Guiraud, M, Powell, R, & Rebay, G, 2001. H2O in metamorphism and unexpected behaviour in the preservation of metamorphic mineral assemblages, Journal of Metamorphic Geology 19, 445–454.

Carson, CJ, Clarke, GL, & Powell, R, 2000. Hydration of eclogite from the Pam Penin­sula, New Caledonia. Journal of Metamorphic Geology 18, 79–90.

Carson, CJ, Powell, R, & Clarke, GL, 1999. Calculated mineral equilibria for eclog­ites in CaO–Na2O–FeO–MgO–Al2O3–SiO2–H2O: application to the Pouébo Terrane, Pam Peninsula, New Caledonia. Journal of Metamorphic Geology 17, 9–24.

Average PT calculations and thermobarometry

Powell, R. & Holland, T.J.B., 2008. On thermobarometry. Journal of Metamorphic Geology, 26, 155–179.

Worley, B, & Powell, R, 2000. High–precision relative thermobarometry: theory and a worked example Journal of Metamorphic Geology 18, 91–102.

Powell, R, & Holland, TJB, 1994. Optimal geothermometry and geobarometry. Amer­ican Mineralogist 79, 120–133.

Different types of phase diagrams and calculations

White, R.W., Powell, R. & Baldwin J.A., 2008. Calculated phase equilibria involving chemical potentials to investigate the textural evolution of metamorphic rocks. Journal of Metamorphic Geology, 26, 181–198.

Baldwin, JA, Powell, R, Williams, ML, & Goncalves, P., 2007. Formation of eclogite, and reaction during exhumation to mid-crustal levels, Snowbird tectonic zone, western Canadian Shield. Journal of Metamorphic Geology, 25, 953–974.

Evans, K, & Powell, R, 2007. DES-code: a metacode to aid calculation of the chemi­cal potential of aqueous solutions at elevated temperatures and pressures. Computers and Geoscience 33, 789–807.

Powell, R. Guiraud, M. & White, R.W., 2005. Truth and beauty in metamorphic mineral equilibria: conjugate variables and phase diagrams. Canadian Mineralogist, 43, 21-33.

White, R.W., Powell, R., & Halpin, J.A., 2004. Spatially-focussed melt formation in aluminous metapelites from Broken Hill, Australia. Journal of Metamorphic Geology, 22, 825–845.

White, RW, Powell, R, & Phillips, GN, 2003. Fluid alteration in mafic greenschist facies rocks: mineral equilibria calculations and comparison with rocks from Kalgoorlie, Western Australia. Journal of Metamorphic Geology 21, 455–468.

Marmo, B, Clarke, G.L., & Powell, R, 2002. Fractionation of bulk rock composition due to porphyroblast growth: effects on eclogite facies mineral equilibria, Pam Peninsula, New Caledonia. Journal of Metamorphic Geology 20, 151–165.

Guiraud, M, Powell, R, & Rebay, G, 2001. H2O in metamorphism and unexpected behaviour in the preservation of metamorphic mineral assemblages, Journal of Metamorphic Geology 19, 445–454.

Powell, R, Holland, TJB, & Worley, B, 1998. Calculating phase diagrams involving solid solutions via non-linear equations, with examples using THERMOCALC Journal of Metamorphic Geology 16, 577–588.

Worley, B, & Powell, R, 1998. Making movies: phase diagrams in temperature, pressure, composition and time. In What drives metamorphism and metamorphic reactions eds PJ Treloar and P O’Brien. Geological Society of London, Special Publications, 138, 263–274.

Worley, B, & Powell, R, 1998. Singularities in the system Na2O–CaO–K2O–MgO–FeO– Al2O3–SiO2–H2O. Journal of Metamorphic Geology 16, 169–188.

Stüwe, K, & Powell, R, 1995. PT paths from modal proportions. Application to the Koralm Complex, Eastern Alps. Contributions to Mineralogy and Petrology 119, 83–93.

Baker, J, Holland, TJB, & Powell, R 1990 Internal buffering in systems with phases which are not solid solutions. Contributions to Mineralogy and Petrology 106, 170–182.

Petrogenetic grids

Diener, J.F.A., Powell, R., & White, R.W., 2008 Quantitative phase petrology of cordierite-orthoamphibole gneisses and related rocks.  Journal of Metamorphic Geology, 26, 795-814.

White, R.W., Powell, R. & Holland T.J.B., 2007. Progress relating to calculation of partial melting equilibria for metapelites. Journal of Metamorphic Geology, 25, 511–527.

Kelsey, D.E., White, R.W., & Powell, R., 2005. Calculated phase equilibria in K2O-FeO­MgO-Al2O3-SiO2-H2O for silica-undersaturated sapphirine-bearing mineral assemblages. Journal of Metamorphic Geology, 23, 217–239.

Wei, CJ, Powell, R, & Clarke, GL, Calculated phase equilibria for low and medium pressure metapelites in the KFMASH and KMnFMASH systems. Journal of Metamorphic Geology, 22, 495-508.

Wei, CJ, & Powell, R, 2004. Calculated phase relations in high-pressure metapelites in the system NKFMASH (Na2O-K2O-FeO-MgO-Al2O3-SiO2-H2O) with application to natural rocks. Journal of Petrology, 45, 183–202.

Wei, CJ, Powell, R, & Zhang, LF, 2003. Calculated mineral equilibria for eclogites from the south Tianshan, NW China. Journal of Metamorphic Geology 21, 163–180.

Rebay, G, & Powell, R, 2002. The formation of eclogite facies metatroctolites and a general petrogenetic grid in Na2O-CaO-FeO-MgO-Al2O3-SiO2-H2O (NCFMASH) Journal of Metamorphic Geology 20, 813–826.

White, R.W., Powell, R. & Clarke, G.L., 2002. The interpretation of reaction tex­tures in Fe-rich metapelitic granulites of the Musgrave Block, central Australia: Constraints from mineral equilibria calculations in the system K2O–FeO–MgO–Al2O3–SiO2–H2O–TiO2–Fe2O3. Journal of Metamorphic Geology 20, 41–55.

Holland, TJB, & Powell, R, 2001. Calculation of phase relations involving haplogranitic melts using an internally-consistent thermodynamic dataset Journal of Petrology 42, 673–683.

White, RW, Powell, R, & Holland, TJB, 2001. Calculation of partial melting equilibria in the system CaO–Na2O–K2O–FeO-MgO-Al2O3–SiO2–H2O (CNKFMASH). Journal of Metamorphic Geology, 19, 139–153.

White, RW, Powell, R, Holland, TJB, & Worley, B, 2000. The effect of TiO2 and Fe2O3 on metapelitic assemblages at greenschist and amphibolite facies conditions: mineral equilibria calculations in the system K2O–FeO–MgO–Al2O3–SiO2–H2O–TiO2–Fe2O3. Journal of Metamorphic Geology, 18, 497–511.

Arnold, J, Powell, R, & Sandiford, M, 2000. Amphibolites with staurolite and other aluminous minerals: calculated mineral equilibria in NCFMASH. Journal of Metamorphic Geology, 18, 23–40.

Powell, R, Holland, TJB, & Worley, B, 1998. Calculating phase diagrams involving solid solutions via non-linear equations, with examples using THERMOCALC Journal of Metamorphic Geology 16, 577–588.

Worley, B, & Powell, R, 1998. Singularities in the system Na2O–CaO–K2O–MgO–FeO– Al2O3–SiO2–H2O. Journal of Metamorphic Geology 16, 169–188.

Xu, G, Will, TM, & Powell, R, 1994. A calculated petrogenetic grid for rocks in the system K20-Fe0-Mg0-Al2O3-SiO2-H20, with particular reference to contact metamorphosed pelites. Journal of Metamorphic Petrology 12, 99–119.

Will, TM, Powell, R, & Holland, TJB, 1990 A calculated petrogenetic grid for ultramafic rocks in the system CaO-FeO-MgO-Al2O3-SiO2-CO2-H2O at low pressures. Contributions to Mineralogy and Petrology 105, 347–358.

Baker, J, Holland, TJB, & Powell, R 1990 Internal buffering in systems with phases which are not solid solutions. Contributions to Mineralogy and Petrology 106, 170–182.

Powell, R, & Holland, TJB, 1990. Calculated mineral equilibria in the pelite system. KFMASH (K20-FeO-MgO-Al2O3-SiO2-H20). American Mineralogist 75, 367–380.

Will, TM, Powell, R, Holland TJB, & Guiraud, M, 1990 Calculated greenschist facies mineral equilibria in the system CaO-FeO-MgO-Al2O3-SiO2-CO2-H2O, Contributions to Mineralogy and Petrology 104, 353–368.

Guiraud, M, Holland, TJB, & Powell, R, 1990 Calculated mineral equilibria in the green-schist -blueschist -eclogite facies in Na2O-FeO-MgO-Al2O3-SiO2-H2O: methods, results and geological applications. Contributions to Mineralogy and Petrology 104, 85–98.