eTable 1a: Representative electron microprobe analyses of clinopyroxene in migmatised, hornfelsed, greenschist facies and ankaramitic dykes.

CLINOPYROXENE
Migmatised dyke / Hornfelsed dyke / Greenschist dyke / Ankaramitic dyke
Edge (IH4-27) / Phyric centre (IH4-26) / Edge
(IH4-64) / Phyric centre (IH4-65) / Phyric centre (IH4-68) / (IH4-76)
leuco / melano / relict pheno / recryst / relict pheno / pheno / pheno
recryst rim / rim(ex) / core (ex) / rim (ex) / core / rim / core / rim / core
SiO2 (wt%) / 51.34 / 52.16 / 50.42 / 50.18 / 49.65 / 52.73 / 46.97 / 50.07 / 49.61 / 51.26 / 45.37 / 50.85
TiO2 / 0.98 / 0.87 / 0.95 / 1.23 / 1.37 / 0.38 / 4.36 / 1.02 / 1.41 / 0.88 / 3.83 / 1.50
Al2O3 / 2.19 / 2.07 / 2.49 / 3.10 / 3.48 / 1.12 / 3.25 / 2.76 / 3.34 / 2.18 / 7.35 / 6.28
Cr2O3 / 0.03 / 0.02 / 0.04 / 0.36 / 0.45 / 0.02 / 0.04 / 0.47 / 0.41 / 0.57 / 0.00 / 0.31
FeOt / 7.08 / 6.94 / 6.34 / 6.63 / 7.01 / 7.02 / 11.05 / 7.14 / 6.13 / 4.82 / 7.57 / 5.97
MnO / 0.26 / 0.25 / 0.25 / 0.24 / 0.23 / 0.23 / 0.33 / 0.18 / 0.12 / 0.09 / 0.11 / 0.08
MgO / 14.24 / 14.67 / 14.46 / 13.91 / 13.99 / 14.27 / 13.89 / 14.61 / 14.61 / 15.72 / 11.82 / 12.70
CaO / 22.56 / 22.43 / 22.65 / 22.60 / 22.50 / 22.85 / 18.16 / 21.93 / 22.17 / 22.46 / 22.39 / 19.90
Na2O / 0.73 / 0.70 / 0.73 / 0.74 / 0.65 / 0.65 / 1.05 / 0.45 / 0.34 / 0.29 / 0.54 / 1.51
Total / 99.41 / 100.12 / 98.33 / 98.99 / 99.33 / 99.27 / 99.09 / 98.65 / 98.12 / 98.28 / 99.00 / 99.12
Si (pfu) / 1.908 / 1.922 / 1.89 / 1.873 / 1.849 / 1.963 / 1.776 / 1.876 / 1.866 / 1.914 / 1.712 / 1.885
Ti / 0.027 / 0.024 / 0.03 / 0.035 / 0.038 / 0.011 / 0.124 / 0.029 / 0.040 / 0.025 / 0.109 / 0.042
Al / 0.096 / 0.090 / 0.11 / 0.136 / 0.153 / 0.049 / 0.145 / 0.122 / 0.148 / 0.096 / 0.327 / 0.275
AlIV / 0.092 / 0.078 / 0.11 / 0.127 / 0.151 / 0.037 / 0.224 / 0.124 / 0.134 / 0.086 / 0.288 / 0.115
AlVI / 0.004 / 0.012 / 0.00 / 0.009 / 0.002 / 0.012 / 0.000 / 0.000 / 0.014 / 0.010 / 0.038 / 0.160
Cr / 0.001 / 0.001 / 0.00 / 0.011 / 0.013 / 0.000 / 0.001 / 0.014 / 0.012 / 0.017 / 0.000 / 0.009
Fe3+ / 0.085 / 0.068 / 0.11 / 0.092 / 0.106 / 0.050 / 0.132 / 0.087 / 0.052 / 0.031 / 0.073 / 0.000
Fe2+ / 0.135 / 0.146 / 0.09 / 0.115 / 0.112 / 0.168 / 0.217 / 0.137 / 0.140 / 0.119 / 0.166 / 0.185
Mn / 0.008 / 0.008 / 0.01 / 0.008 / 0.007 / 0.007 / 0.010 / 0.006 / 0.004 / 0.003 / 0.004 / 0.002
Mg / 0.789 / 0.806 / 0.81 / 0.774 / 0.777 / 0.792 / 0.782 / 0.816 / 0.819 / 0.875 / 0.665 / 0.702
Ca / 0.898 / 0.886 / 0.91 / 0.904 / 0.898 / 0.911 / 0.735 / 0.881 / 0.893 / 0.899 / 0.905 / 0.790
Na / 0.052 / 0.050 / 0.05 / 0.054 / 0.047 / 0.047 / 0.077 / 0.033 / 0.025 / 0.021 / 0.040 / 0.108
Sum / 4 / 4 / 4 / 4 / 4 / 4 / 4 / 4 / 4 / 4 / 4 / 4
Mg # / 85.4 / 84.7 / 0.90 / 87.1 / 87.4 / 82.5 / 78.3 / 85.6 / 85.4 / 88.0 / 80.0 / 79.1

* leuco/melano = from leucosome/melanosome, pheno = phenocryst, recryst = recrystallised, ex = contains ilmenite exsolution lamellae

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eTable 1b: Representative electron microprobe analyses of plagioclase in migmatised, hornfelsed and greenschist facies dykes.

PLAGIOCLASE
Migmatised dyke / Hornfelsed dyke / Greenschist dyke
(IH4-27) / (IH4-64) / (IH4-68)
leuco / melano / recryst
SiO2 (wt%) / 58.89 / 58.50 / 59.64 / 67.76
Al2O3 / 25.35 / 25.54 / 24.76 / 19.69
Fe2O3 / 0.42 / 0.63 / 0.56 / 0.13
MgO / 0.01 / 0.01 / 0.02 / 0.01
CaO / 7.07 / 7.30 / 6.44 / 0.44
Na2O / 7.09 / 7.18 / 7.66 / 11.46
K2O / 0.73 / 0.56 / 0.62 / 0.07
BaO / 0.03 / 0.02 / 0.01
Total / 99.59 / 99.75 / 99.71 / 99.56
Si (p.f.u.) / 2.647 / 2.630 / 2.675 / 2.978
Al / 1.343 / 1.353 / 1.309 / 1.020
Fe3+ / 0.013 / 0.019 / 0.017 / 0.004
Mg / 0.001 / 0.000 / 0.002 / 0.000
Ca / 0.341 / 0.352 / 0.309 / 0.021
Na / 0.618 / 0.626 / 0.666 / 0.977
K / 0.042 / 0.032 / 0.036 / 0.005
Ba / 0.001 / 0.000 / 0.000
Sum / 5.005 / 5.013 / 5.013 / 5.004
%Ab / 61.78 / 61.99 / 65.88 / 97.47
%An / 34.04 / 34.84 / 30.61 / 2.05
%Or / 4.19 / 3.18 / 3.51 / 0.49

* leuco/melano = leucosome/melanosome, recryst = recrystallised

eTable 1c:Representative electron microprobe analyses of biotite and amphibole in migmatised, hornfelsed, greenschist facies dykes.

BIOTITE / AMPHIBOLE
Migmatised
dyke / Hornfelsed dyke / Greenschist dyke
(IH4-27) / (IH4-65) / (IH4-68)
leuco / melano / edenite
SiO2(wt%) / 37.06 / 36.67 / 38.12 / 47.23
TiO2 / 7.39 / 7.12 / 6.16 / 0.68
Al2O3 / 13.70 / 13.74 / 13.49 / 8.27
Cr2O3 / 0.02 / 0.04 / 0.06 / 0.05
FeOt / 10.63 / 10.73 / 10.67 / 10.81
MnO / 0.07 / 0.08 / 0.10 / 0.24
MgO / 16.80 / 16.74 / 17.38 / 15.51
CaO / 0.03 / 0.11 / 0.12 / 12.18
Na2O / 0.39 / 0.29 / 0.60 / 2.21
K2O / 10.26 / 10.16 / 9.64 / 0.15
BaO / 0.33 / 0.30 / 0.22
F / 0.54 / 0.52 / 0.40
Cl / 0.08 / 0.07 / 0.06
Total / 97.29 / 96.58 / 97.04 / 97.32

* leuco/melano = leucosome/melanosome
eTable 2: Oxygen isotope data and sample coordinates.

Zone / Sample / Type / Coordinates / Distance (m)
from PX2 / δ18O VSMOW (‰)
Whole-rock / Mineral separates
PX2 Intrusion / IH4-14 / Wherlite / 586106/3137488/154 / -20 / 4.2 / cpx #1 / 3.7
cpx #2 / 3.8
cpx #3 / 3.6
plagioclase #1 / 4.7
plagioclase #2 / 4.8
plagioclase #3 / 4.6
Migmatite zone / IH4-26 / Migmatised dyke
(phyric core) / 585682/3137313/196 / 130 / -2.7 / cpx phenocryst #1** / 2.0
cpx phenocryst #1** / 1.2
cpx phenocryst #1** / 2.3
cpx phenocryst #1** / 2.6
cpx phenocryst #2** / 0.3
cpx phenocryst #2** / -0.5
cpx phenocryst #4** / 3.3
cpx phenocryst #4** / 3.4
cpx phenocryst #5** / 3.2
cpx phenocryst #5** / 3.1
IH4-27 / Migmatised dyke
(aphyric rim) / 585682/3137313/196 / 130 / -3.4 / oxides† / -7.6
biotite / -4.4
diopside (leucosome) / -4.2
plag (leucosome) / -2.8
IH4-28 / PX1 gabbro / 585682/3137313/196 / 130 / 1.0 / cpx #1 / 4.6
cpx #2 / 3.8
cpx #3 / 3.6
cpx #4 / 3.5
plagioclase #1 / 2.1
plagioclase #2 / 2.4
plagioclase #3 / 3.0
IH4-31 / Migmatised dyke / 585582/3137271/222 / 160 / -3.4
Hornfels zone / IH4-54 / Hornfelsed dyke
PX1 gabbro / 585307/3137386/336 / 420 / -2.5
IH4-58 / 585652/3137668/169 / 430 / 2.8 / plagioclase #1 / 1.8
plagioclase #2 / 1.7
plagioclase #3 / 2.2
cpx #1 / 4.1
cpx #2 / 4.6
cpx #3 / 4.6
IH4-64 / Hornfelsed dyke
(aphyric rim) / 585663/3137670/162 / 430 / -1.3 / oxides (5% plag)† / -5.2
biotite (calculated)† / -1.8
plagioclase† / -0.5
IH4-65 / Hornfelsed dyke
(phyric centre) / 585663/3137670/162 / 430 / 0.2 / cpx phenocryst #1* / 4.4
cpx phenocryst #1* / 5.1
cpx phenocryst #1* / 5.0
cpx phenocryst #1* / 4.9
cpx phenocryst #2* / 2.2
cpx phenocryst #2* / 4.9
cpx phenocryst #2* / 4.7
cpx phenocryst #3 / 4.9
cpx phenocryst #3 / 4.9
Hydrothermally
Metamorphosed
zone / IH4-66 / Greenschist dyke / 585799/3139220/141 / 1450 / -0.2
IH4-67 / Greenschist dyke / 585799/3139220/141 / 1450 / -0.7 / feldspar/zeolite / 2.1
(aphyric rim)
IH4-68 / Greenschist dyke / 585799/3139220/141 / 1450 / -0.8 / edenite pseudomorphing cpx pheno #1 / -1.8
(phyric centre) / edenite pseudomorphing cpx pheno #2 / -2.1
cpx phenocryst #1 / 4.3
cpx phenocryst #1 / 4.8
cpx phenocryst #1 / 3.5
cpx phenocryst #1 / 4.3
cpx phenocryst #2 / 4.5
cpx phenocryst #2 / 4.0

eTable 2: continued.

Zone / Sample / Type / Coordinates / Distance
(m)
from PX2 / δ18O VSMOW (‰)
Whole-rock / Mineral separates
Hydrothermally
metamorphosed
zone / IH4-69 / PX1 gabbro / 585799/3139220/141 / 1450 / 2.8 / cpx #1 / 4.8
cpx #2 / 4.9
cpx #3 / 5.0
cpx #4 / 5.0
plagioclase #1 / 2.7
plagioclase #2 / 2.4
plagioclase #3 / 3.0
Beyond aureoles / IH4-76 / Ankaramitic dyke / 582616/3141859 / 5470 / 5.1 / cpx phenocryst #1 / 5.1
cpx phenocryst #1 / 4.9
cpx phenocryst #1 / 4.9
cpx phenocryst #1 / 4.9
PX1 aureole
migmatite / FB3-21 / Migmatised dyke
(aphyric rim) / 583212/3140424/76 / 4000 / 5.2 / cpx phenocryst #1** / 4.9
zone / cpx phenocryst #1** / 4.9
FB3-20 / Migmatised dyke
(phyric core) / 583212/3140424/76 / 4000 / 5.6

*clinopyroxene phenocrysts with partial ilmenite exsolution. **clinopyroxene phenocrysts with a high concentration of ilmenite exsolution. † minerals separated using sieves and magnetic separation techniques. NB: All analyses of large minerals i.e. cpx and plagioclase from plutonic rocks, and cpx phenocrysts in dykes, are shown, as important heterogeneities (even within single crystals) could otherwise be lost

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