T. Nagel, C. de Capitani and M. Frey, J. metamorphic Geol., 2002, 20, Equilibrium assemblage diagrams: sample TN205 1 mm

Sample TN205. Sample TN205 from Nagel et al will be repeatedly used in the following to demonstrate the capabilities of Theriak/Domino. This metapelite was collected from the second staurolite zone in the eastern Lepontine Alps, is rich in K and Na, with a low K/(K + Na) ratio of 0.51 and a high Fe/(Fe + Mg) ratio of It contains garnet, white mica, biotite, staurolite, paragonite, plagioclase, quartz, chlorite and accessory ilmenite, rutile and apatite. The matrix assemblage is Grt- Ms-Bi-Qtz-Pl-St. Relics of a high-pressure assemblage are Grt-Ms-Pg. Contrary to other metapelites from the same area, this sample does not contain kyanite. Staurolite is observed to grow at the expense of paragonite. The P-T evolution of this rock is described in Nagel et al and is similar to TN291, for which some diagrams were published. The database used here is JUN92 (based on Berman, 1988) with improved solution models for white mica (Keller et al. 2005) and Chlorite (Hunziker 2003). The (simplified) bulk composition in moles of TN205 is Si(50.36) Al(30.54) Fe(6.23) Mg(2.46) Ca(1.07) Na(4.62) K(4.73) O( ). For the calculations, excess water was added. Equilibrium assemblage diagrams: sample TN205 T. Nagel, C. de Capitani and M. Frey, J. metamorphic Geol., 2002, 20,

Equilibrium assemblage diagrams: sample TN205 Staurolite (Fig. 3a) Four staurolite zones can be distinguished in the study area (Fig, 3a). In the zone 1, north of the generally accepted staurolite/kyanite mineral zone boundry (e.g. Niggli & Niggli, 1965, Frey et al., 1999), staurolite is rarely present and occurs as tiny idiomorphic crystals in exceptionally Al-rich rocks (see also Klein, 1976 and Löw, 1987). Staurolite-bearing samples in this zone contain the assemblage Qtz+Grt+Phe+Pg+St+Ky+/-Bt+/- Chl. They are always devoid of plagioclase and commonly contain kyanite and abundant whit mica (Fig. 4a). The boundry between zones 1 and 2 represents the staurolite/kyanite mineral zone boundry of previous authors. Within zone 2 staurolite is more frequent and occurs in the assemblage Qtz+Grt+Phe+St+Pl+/-Bt. Porphyroblasts up to 2 cm in size, are present predominantly in Na-rich samples. In contrast to zone 1, porphyroblastic staurolite occurences in zone 2 are commonly related to the presence of plagioclase (Fig. 4b) and also often appear widely distributed, although the modal amount and the crystal size in metapelites decrease significantly at the zone 2-zone 3-transition and kyanite becomes the dominant Al-excess phase. In the southernmost part of the study area (zone 4) staurolite ist virtually absent. Chlorite always postdates staurolite in zones 1-3. T. Nagel, C. de Capitani and M. Frey, J. metamorphic Geol., 2002, 20,

open folder“TheriakDomino.../Calgary /TN205” cd to folder“TheriakDomino.../Calgary /TN205” (includes THERIN, JUN92.bs, tcdb55c2p) Equilibrium assemblage diagrams: sample TN205

Si Al Fe 6.23 Mg 2.46 Ca 1.07 Na 4.62 K 4.73 O Equilibrium assemblage diagrams: sample TN205 Simplified bulk composition in moles of the elements. (Ti, Mn ignored) Input in THERIN: (excess H 2 O) SI(50.36)AL(30.54)FE(6.23)MG(2.46)CA(1.07)NA(4.62)K(4.73)O( )H(60)O(30) *

THERIN: theriak database:JUN92.bs type of calculations:loop Temperature and Pressure: Several blanks Equilibrium assemblage diagrams: sample TN SI(50.36)AL(30.54)FE(6.23)MG(2.46)CA(1.07)NA(4.62)K(4.73)O( )H(60)O(30) *

equilibrium assemblage: P = bar P(Gas) = bar T = C = K stable phases: 7 loop = 23 loop2 = 1 max.phases = 368 gcalc = blkshift = E-14 G(-) = E-10 G(System) = stepsize = E-08 R = phase N mol% x x activity act.(x) GARNET_Alm GROSSULAR E E E-05 PYROPE E E E-03 ALMANDINE E E E-01 [Ca(M)] = [Mg(M)] = [Fe(M)] = Mg/(Fe+Mg) = FSP_Ab ALBITE E E E-01 K-FELDSPAR E E E-01 ANORTHITE E E E-01 Si(pfu) = BIOTITE_Ann PHLOGOPITE E E E-02 ANNITE E E E-01 [Fe(M)] = [Mg(M)] = Mg/(Fe+Mg) = WHITE_MICA_Ms MUSCOVITE E E E-01 PARAGONITE E E E-01 MCELADONITE E E E-03 FCELADONITE E E E-03 [Si(Z)] = [Al(Z)] = Mg/(Fe+Mg) = Si(pfu) = CORD_fCd CORDIERITE E E E-02 HY_CORDIERITE E E E-02 FE_CORDIERITE E E E-01 HY_Fe_CORDIERITE E E E-02 Mg/(Fe+Mg) = A-QUARTZ STEAM (Fe/Mg): GARNET - BIOTITE KD = ln(KD) = (Fe/Mg): GARNET - WHITE MICA KD = ln(KD) = Equilibrium assemblage diagrams: sample TN205

volumes and densities of stable phases: solid phases N volume/mol volume[ccm] vol% | wt/mol wt [g] wt % | density [g/ccm] | | GARNET_Alm | | FSP_Ab | | BIOTITE_Ann | | WHITE_MICA_Ms | | CORD_fCd | | A-QUARTZ | | | | total of solids | | gases and fluids N volume/mol volume[ccm] wt/mol wt [g] density [g/ccm] STEAM H2O content of stable phases: | wt% of wt% of wt% of solid phases N H2O[pfu] H2O[mol] H2O [g] | phase solids H2O.solid | BIOTITE_Ann | WHITE_MICA_Ms | CORD_fCd | | total H2O in solids | | wt% of gases and fluids N H2O[pfu] H2O[mol] H2O [g] | phase | STEAM | Equilibrium assemblage diagrams: sample TN205

Calculate a P-T equilibrium assemblage diagram, using the database JUN92.bs Temperature range: 520 – 780 o C Pressure range: Bar X-axisTC Y-axisP calculation type. labeling of reactions1 Several blanks domino dot THERIN: SI(50.36)AL(30.54)FE(6.23)MG(2.46)CA(1.07)NA(4.62)K(4.73)O( )H(60)O(30) * Equilibrium assemblage diagrams: sample TN205

1): FSP BIOTITE WHITE MICA CORD aQz H2O = (2)FSP BIOTITE WHITE MICA CORD aQz H2O 2): (2)FSP BIOTITE WHITE MICA CORD aQz H2O = (2)FSP BIOTITE WHITE MICA CORD H2O 3): (2)FSP BIOTITE WHITE MICA CORD H2O = SPIN (2)FSP BIOTITE WHITE MICA CORD H2O 4): SPIN (2)FSP BIOTITE WHITE MICA CORD H2O = SPIN (2)FSP WHITE MICA CORD H2O 5): SPIN (2)FSP WHITE MICA CORD H2O = SPIN (2)FSP WHITE MICA CORD Co H2O 6): SPIN (2)FSP WHITE MICA CORD Co H2O = SPIN (2)FSP CORD Co H2O 7): FSP WHITE MICA CHL4 CTOID aQz H2O = FSP WHITE MICA STAU CHL4 CTOID aQz H2O 8): FSP WHITE MICA STAU CHL4 CTOID aQz H2O = FSP WHITE MICA STAU CHL4 aQz H2O 9): FSP WHITE MICA STAU CHL4 aQz H2O = GARNET FSP WHITE MICA STAU CHL4 aQz H2O 10): GARNET FSP WHITE MICA STAU CHL4 aQz H2O = GARNET FSP BIOTITE WHITE MICA STAU CHL4 aQz H2O 11): GARNET FSP BIOTITE WHITE MICA STAU CHL4 aQz H2O = GARNET FSP BIOTITE WHITE MICA STAU aQz H2O 12): GARNET FSP BIOTITE WHITE MICA STAU aQz H2O = GARNET FSP BIOTITE WHITE MICA CORD aQz H2O 13): GARNET FSP BIOTITE WHITE MICA CORD aQz H2O = GARNET (2)FSP BIOTITE WHITE MICA CORD aQz H2O 14): GARNET (2)FSP BIOTITE WHITE MICA CORD aQz H2O = GARNET (2)FSP WHITE MICA CORD aQz H2O 15): GARNET (2)FSP WHITE MICA CORD aQz H2O = GARNET (2)FSP WHITE MICA CORD H2O 16): GARNET (2)FSP WHITE MICA CORD H2O = GARNET (2)FSP WHITE MICA CORD Si H2O 17): GARNET (2)FSP WHITE MICA CORD Si H2O = SPIN GARNET (2)FSP WHITE MICA CORD Si H2O 18): SPIN GARNET (2)FSP WHITE MICA CORD Si H2O = SPIN GARNET (2)FSP CORD Si H2O 19): SPIN GARNET (2)FSP CORD Si H2O = SPIN (2)FSP CORD Si H2O 20): GARNET FSP (2)WHITE MICA CHL4 CTOID aQz H2O = FSP (2)WHITE MICA CHL4 CTOID aQz H2O 21): GARNET FSP (2)WHITE MICA CHL4 aQz H2O = GARNET FSP (2)WHITE MICA CHL4 CTOID aQz H2O 22): GARNET FSP (2)WHITE MICA CHL4 aQz H2O = GARNET FSP (2)WHITE MICA STAU CHL4 aQz H2O 23): GARNET FSP (2)WHITE MICA STAU CHL4 aQz H2O = GARNET FSP WHITE MICA STAU CHL4 aQz H2O 24): GARNET FSP BIOTITE WHITE MICA STAU aQz H2O = GARNET FSP BIOTITE WHITE MICA STAU aQz Si H2O 25): GARNET FSP BIOTITE WHITE MICA STAU aQz Si H2O = GARNET FSP BIOTITE WHITE MICA aQz Si H2O 26): GARNET FSP BIOTITE WHITE MICA aQz Si H2O = GARNET FSP BIOTITE WHITE MICA bQz Si H2O 27): GARNET FSP BIOTITE WHITE MICA bQz Si H2O = GARNET (2)FSP BIOTITE WHITE MICA bQz Si H2O 28): GARNET (2)FSP BIOTITE WHITE MICA bQz Si H2O = GARNET (2)FSP BIOTITE bQz Si H2O 29): GARNET (2)FSP BIOTITE bQz Si H2O = GARNET (2)FSP BIOTITE CORD bQz Si H2O 30): GARNET (2)FSP BIOTITE CORD bQz Si H2O = GARNET (2)FSP CORD bQz Si H2O 31): GARNET FSP (2)WHITE MICA STAU CHL4 aQz H2O = GARNET FSP BIOTITE (2)WHITE MICA STAU aQz H2O 32): GARNET FSP BIOTITE (2)WHITE MICA STAU aQz H2O = GARNET FSP BIOTITE WHITE MICA STAU aQz H2O 33): GARNET BIOTITE (2)WHITE MICA CHL4 aQz H2O = GARNET BIOTITE (2)WHITE MICA aQz H2O Equilibrium assemblage diagrams: sample TN205 table

theriak database:JUN92.bs type of calculations:loop Temperature and Pressure: Temperature and Pressure: Temperature and Pressure: Equilibrium assemblage diagrams: sample TN205

Gr Ms Pg Bi Gr Ms Pg Gr Ms Pg Plag +Qtz +H 2 O Equilibrium assemblage diagrams: sample TN205

Gr Ms Pg Bi Gr Ms Pg Gr Ms Pg Plag 48): GARNET (2)WHITE MICA CTOID aQz H2O = GARNET (2)WHITE MICA aQz H2O Gr Ms Pg Ctd 48 +Qtz +H 2 O Equilibrium assemblage diagrams: sample TN205

Plag Pg Kfs Ms

Equilibrium assemblage diagrams: sample TN205 Plag Pg Kfs Ms St Ky Si Crd

Equilibrium assemblage diagrams: sample TN205 Plag Pg Kfs Ms St Ky Si Crd Chl Bi

Equilibrium assemblage diagrams: sample TN205 Plag Pg Kfs Ms St Ky Si Crd Chl Bi