Table 1
Magmatic and subsolidus mineral paragenetic sequence in the studied diabase sills
Table 2
Sample / 750/2 / 727/6c / 727/10 / 727-4A / 728-12 / 111.10 / 86.58 / 24.55 / 12.90 / 4.02 / 751-26 / 751/30 / 751/5 / 728/10Sill / 2 / 3 / 3 / 4 / 5 / 7 / 7 / 7 / 7 / 7 / 8 / 9 / 10 / 13
SiO2 / 51.14 / 50.49 / 50.54 / 50.19 / 52.08 / 49.59 / 49.96 / 53.12 / 52.19 / 52.15 / 50.43 / 51.06 / 50.85 / 50.49
TiO2 / 1.06 / 1.07 / 1.02 / 1.30 / 0.87 / 1.48 / 1.24 / 0.15 / 0.28 / 0.04 / 1.07 / 0.66 / 1.14 / 1.13
Al2O3 / 2.59 / 2.91 / 2.42 / 2.32 / 1.83 / 2.91 / 3.15 / 0.42 / 0.56 / 0.22 / 2.89 / 1.46 / 2.52 / 3.01
Cr2O3 / 0.14 / 0.00 / 0.00 / 0.00 / 0.00 / 0.08 / 0.18 / 0.00 / 0.00 / 0.02 / 0.27 / 0.00 / 0.05 / 0.08
FeO* / 7.60 / 8.69 / 8.34 / 8.32 / 10.19 / 8.12 / 7.89 / 5.76 / 10.79 / 12.97 / 8.34 / 13.69 / 8.63 / 7.71
MnO / 0.18 / 0.21 / 0.19 / 0.20 / 0.34 / 0.16 / 0.16 / 0.20 / 0.37 / 0.27 / 0.19 / 0.35 / 0.21 / 0.08
NiO / 0.06 / 0.10 / 0.00 / 0.00 / 0.03 / 0.01 / 0.00 / 0.11 / 0.03 / 0.00 / 0.01 / 0.06 / 0.06 / 0.00
MgO / 15.58 / 15.27 / 15.24 / 15.21 / 14.92 / 14.62 / 14.86 / 14.84 / 13.63 / 11.62 / 14.50 / 11.88 / 15.56 / 15.51
CaO / 20.67 / 20.18 / 20.84 / 20.57 / 19.67 / 20.67 / 21.08 / 24.49 / 21.23 / 21.16 / 21.11 / 18.94 / 19.37 / 21.06
Na2O / 0.33 / 0.33 / 0.34 / 0.37 / 0.30 / 0.38 / 0.33 / 0.03 / 0.26 / 0.19 / 0.38 / 0.27 / 0.36 / 0.34
K2O / 0.03 / 0.00 / 0.00 / 0.00 / 0.00 / 0.01 / 0.00 / 0.00 / 0.01 / 0.04 / 0.02 / 0.00 / 0.01 / 0.00
Total / 99.38 / 99.26 / 98.93 / 98.47 / 100.23 / 98.02 / 98.86 / 99.11 / 99.33 / 98.68 / 99.20 / 98.38 / 98.77 / 99.41
% Wo / 42.70 / 41.72 / 42.79 / 42.53 / 40.44 / 43.54 / 43.88 / 49.19 / 43.42 / 44.40 / 44.03 / 40.78 / 40.42 / 43.23
% En / 44.75 / 43.90 / 43.54 / 43.72 / 42.67 / 42.84 / 43.03 / 41.46 / 38.76 / 33.91 / 42.08 / 35.60 / 45.17 / 44.29
% Fs / 12.55 / 14.37 / 13.67 / 13.75 / 16.90 / 13.61 / 13.09 / 9.35 / 17.82 / 21.69 / 13.89 / 23.62 / 14.41 / 12.47
Representative electron microprobe chemical analysis of clinopyroxenes
Sill numbers according to figure 1c from the paper; samples for sill 7 are ordered from the bottom to the top; * total iron is quoted as FeO.
Table 3
Representative electron microprobe chemical analysis of plagioclases
Sample / 750/1 / 727-4A / 148.8 / 111.1 / 111.1 / 86.58 / 86.58 / 24.55 / 18.64 / 12.9 / 4.02 / 751-26 / 751/5 / 751/5Sill / 1 / 4 / 7 / 7 / 7 / 7 / 7 / 7 / 7 / 7 / 7 / 8 / 10 / 10
SiO2 / 52.78 / 66.22 / 66.96 / 49.35 / 51.89 / 53.15 / 47.47 / 67.45 / 67.81 / 66.84 / 67.48 / 49.76 / 53.21 / 50.85
TiO2 / 0.14 / 0.01 / 0.05 / 0.02 / 0.06 / 0.07 / 0.10 / 0.00 / 0.02 / 0.03 / 0.04 / 0.08 / 0.09 / 0.09
Al2O3 / 28.98 / 22.54 / 19.62 / 31.47 / 29.13 / 29.51 / 33.18 / 19.11 / 21.69 / 19.94 / 19.81 / 29.87 / 29.92 / 31.45
FeO* / 0.57 / 0.11 / 0.20 / 0.29 / 0.45 / 0.29 / 0.44 / 0.32 / 0.03 / 0.08 / 0.03 / 0.38 / 0.27 / 0.18
MnO / 0.00 / 0.00 / 0.05 / 0.00 / 0.00 / 0.01 / 0.00 / 0.03 / 0.01 / 0.05 / 0.06 / 0.00 / 0.02 / 0.00
MgO / 0.12 / 0.00 / 0.04 / 0.03 / 0.03 / 0.04 / 0.01 / 0.00 / 0.00 / 0.00 / 0.00 / 0.05 / 0.04 / 0.05
CaO / 11.88 / 1.24 / 0.67 / 14.64 / 12.07 / 11.35 / 15.91 / 0.10 / 0.43 / 0.76 / 0.56 / 13.47 / 11.89 / 13.44
Na2O / 4.75 / 10.53 / 10.98 / 3.12 / 4.56 / 5.24 / 2.33 / 11.52 / 10.16 / 11.26 / 11.70 / 4.06 / 5.13 / 4.12
K2O / 0.18 / 0.07 / 0.07 / 0.08 / 0.18 / 0.23 / 0.08 / 0.10 / 0.13 / 0.11 / 0.10 / 0.15 / 0.05 / 0.04
Total / 99.39 / 100.70 / 98.62 / 99.00 / 98.36 / 99.89 / 99.52 / 98.63 / 100.28 / 99.07 / 99.77 / 97.81 / 100.62 / 100.21
XOr / 0.01 / 0.00 / 0.00 / 0.00 / 0.01 / 0.01 / 0.00 / 0.01 / 0.01 / 0.01 / 0.01 / 0.01 / 0.00 / 0.00
XAb / 0.41 / 0.93 / 0.96 / 0.28 / 0.40 / 0.45 / 0.21 / 0.99 / 0.97 / 0.95 / 0.97 / 0.35 / 0.44 / 0.35
XAn / 0.58 / 0.06 / 0.04 / 0.72 / 0.59 / 0.54 / 0.79 / 0.01 / 0.02 / 0.04 / 0.03 / 0.64 / 0.56 / 0.64
Sill numbers according to figure 1c from the paper; samples for sill 7 are ordered from the bottom to the top;* total iron is quoted as FeO
Table 4
Representative electron microprobe chemical analysis of amphiboles
Sample / 728-12 / 148.80 / 111.10 / 111.10 / 111.10 / 86.58 / 24.55 / 18.64 / 12.90 / 12.90 / 4.02 / 751-26 / 751-26Sill / 5 / 7 / 7 / 7 / 7 / 7 / 7 / 7 / 7 / 7 / 7 / 8 / 8
SiO2 / 48.25 / 50.15 / 43.14 / 51.80 / 42.20 / 43.08 / 48.30 / 49.24 / 42.39 / 48.38 / 49.13 / 47.97 / 43.05
TiO2 / 1.16 / 0.87 / 3.63 / 0.10 / 4.04 / 3.30 / 0.91 / 0.65 / 2.72 / 0.57 / 0.16 / 0.49 / 2.94
Al2O3 / 3.54 / 3.90 / 9.60 / 2.88 / 10.48 / 9.96 / 3.58 / 2.65 / 9.09 / 3.77 / 4.29 / 7.57 / 9.53
Cr2O3 / 0.00 / 0.00 / 0.06 / 0.05 / 0.09 / 0.16 / 0.06 / 0.00 / 0.03 / 0.07 / 0.03 / 0.00 / 0.15
Fe2O3 / 6.57 / 9.50 / 2.85 / 5.12 / 4.04 / 2.75 / 9.44 / 5.99 / 0.07 / 6.40 / 7.55 / 3.10 / 2.58
FeO / 12.57 / 8.71 / 9.98 / 10.47 / 8.59 / 9.66 / 9.33 / 19.57 / 19.96 / 17.70 / 15.79 / 12.34 / 10.02
MnO / 0.12 / 0.21 / 0.14 / 0.38 / 0.18 / 0.10 / 0.32 / 0.33 / 0.11 / 0.22 / 0.46 / 0.33 / 0.03
NiO / 0.01 / 0.00 / 0.04 / 0.03 / 0.00 / 0.04 / 0.01 / 0.05 / 0.03 / 0.00 / 0.00 / 0.09 / 0.10
MgO / 11.97 / 12.50 / 13.35 / 13.91 / 13.21 / 13.31 / 12.43 / 6.82 / 8.18 / 8.44 / 8.85 / 11.98 / 13.39
CaO / 9.86 / 9.88 / 11.23 / 11.55 / 10.96 / 11.33 / 9.37 / 9.65 / 11.17 / 10.68 / 10.57 / 11.63 / 11.46
Na2O / 2.08 / 0.82 / 2.59 / 0.53 / 2.40 / 2.14 / 1.94 / 0.71 / 2.58 / 0.91 / 0.77 / 1.36 / 2.32
K2O / 0.66 / 0.18 / 0.55 / 0.03 / 0.69 / 0.92 / 0.46 / 0.28 / 0.76 / 0.22 / 0.11 / 0.06 / 0.76
F / 0.01 / 0.01 / 0.01 / 0.00 / 0.04 / 0.00 / 0.01 / 0.00 / 0.00 / 0.03 / 0.00 / 0.02 / 0.00
Cl / 0.15 / 0.12 / 0.14 / 0.04 / 0.16 / 0.20 / 0.12 / 0.22 / 0.47 / 0.13 / 0.07 / 0.08 / 0.20
Total / 96.94 / 96.82 / 97.29 / 96.93 / 97.06 / 96.99 / 96.27 / 96.22 / 97.55 / 97.49 / 97.77 / 96.99 / 96.50
Si (p.f.u.) / 7.23 / 7.36 / 6.39 / 7.57 / 6.25 / 6.40 / 7.22 / 7.60 / 6.54 / 7.34 / 7.36 / 7.08 / 6.43
Ti / 0.13 / 0.10 / 0.40 / 0.01 / 0.45 / 0.37 / 0.10 / 0.08 / 0.32 / 0.06 / 0.02 / 0.05 / 0.33
Al(4) / 0.63 / 0.64 / 1.61 / 0.43 / 1.75 / 1.60 / 0.63 / 0.40 / 1.46 / 0.66 / 0.64 / 0.92 / 1.57
Al(6) / 0.00 / 0.03 / 0.07 / 0.06 / 0.08 / 0.14 / 0.00 / 0.08 / 0.20 / 0.01 / 0.11 / 0.39 / 0.11
NaB / 0.42 / 0.23 / 0.22 / 0.15 / 0.26 / 0.20 / 0.50 / 0.21 / 0.15 / 0.26 / 0.22 / 0.16 / 0.16
NaA / 0.19 / 0.00 / 0.53 / 0.00 / 0.43 / 0.42 / 0.06 / 0.00 / 0.62 / 0.00 / 0.00 / 0.23 / 0.51
(Na+K)A / 0.31 / 0.03 / 0.63 / 0.01 / 0.56 / 0.59 / 0.15 / 0.05 / 0.77 / 0.04 / 0.02 / 0.24 / 0.65
(Ca+Na)B / 2.00 / 1.79 / 2.00 / 1.96 / 2.00 / 2.00 / 2.00 / 1.81 / 2.00 / 2.00 / 1.92 / 2.00 / 2.00
CaB / 1.58 / 1.55 / 1.78 / 1.81 / 1.74 / 1.80 / 1.50 / 1.60 / 1.85 / 1.74 / 1.70 / 1.84 / 1.84
Mg* / 0.63 / 0.72 / 0.70 / 0.70 / 0.73 / 0.71 / 0.70 / 0.38 / 0.42 / 0.46 / 0.49 / 0.63 / 0.70
Amp.type** / Mg-hb / Mg-hb / Pg / Act / Pg / Pg / Mg-hb / Fe-Act / Fe-Ed / Fe-hb / Fe-hb / Mg-hb / Pg
Sill numbers according to figure 1c; samples for sill 7 are ordered from the bottom to the top; Fe2O3 estimated by charge balance; cations in formula on the basis of 13 cations except Ca, Na and K; Mg*=Mg/(Mg+Fe2+); **: amphibole type after Leake et al. (2004); Mg-hb: magnesio-hornblende; Pg: pargasite; Act: actinolite; Fe-Act: ferroactinolite; Fe-Ed: ferro-edenite; Fe-Hb: ferro-hornblende.
Table 5
Trace-element modelling for the sill 7
Kd values / CM (SG3-0.5)-Gb (SG1-18.64) / CM (SG3-0.5)-Gb (SG1-59.85)Element / Pl / Ol / Cpx / Ilm / Measured / FC / D / Measured / FC / D
Cr 0.01 2.1 4 6 0 125 2.28 25 55 2.45
Sc 0.04 3.05 3.3 1.8 34 23 2.39 16 16 1.92
V 0.1 0.02 2.31 1.2 384 333 0.88 135 138 1.99
U 0.01 0.01 0.00001 0.009 0.68 0.64 0.006 1.13 1.09 0.005
Nb 0.008 0.0016 0.004 0.8 12.5 17.5 0.004 19.4 28.1 0.07
Th 0.05 0.00001 0.04 0.00055 2.34 2.34 0.03 4.0 3.9 0.04
Ta 0.08 0.03 0.075 6.6 1.09 1.64 0.06 1.71 1.73 0.58
Ti 0.04 0.08 0.2 - 16906 20391 0.11 13200 - -
P 0.024 0.055 0.0094 0.05 1113 769 0.03 1549 1294 0.02
Zr 0.13 0.015 0.27 0.28 239 239 0.14 342 360 0.19
Hf 0.051 0.04 0.48 1.883 6.7 6.2 0.21 8.5 8.1 0.38
Y 0.031 0.009 0.72 0.0045 50.4 43.4 0.28 61.5 60.8 0.33
La 0.022 0.0004 0.002 0.098 19.3 18.6 0.006 31.5 31.1 0.02
Ce 0.016 0.009 0.017 0.11 44.6 45.0 0.01 75.7 75.3 0.02
Nd 0.014 0.0046 0.07 0.14 27.8 27.4 0.03 44.6 45.1 0.05
Sm 0.014 0.015 0.458 0.15 7.33 7.08 0.18 11.1 10.6 0.22
Eu 0.32 0.008 0.63 0.1 2.97 2.32 0.32 3.07 3.08 0.41
Gd 0.04 0.012 0.46 0.14 8.47 7.58 0.18 11.4 11.2 0.23
Tb 0.026 0.00518 0.73 0.14 1.37 1.34 0.28 1.97 1.86 0.34
Dy 0.018 0.007 0.9 0.01 8.04 7.84 0.34 11.3 10.5 0.41
Ho 0.011 0.0118 0.6 0.13 1.56 1.59 0.23 2.21 2.29 0.28
Er 0.02 0.045 0.57 - 4.44 4.72 0.23 6.48 - -
Tm 0.036 0.009 0.633 0.1 0.615 0.655 0.25 0.909 0.932 0.30
Yb 0.03 0.0087 0.9 0.17 3.66 3.79 0.34 5.44 5.03 0.42
Lu 0.037 0.0454 0.958 0.084 0.523 0.546 0.38 0.771 0.715 0.45
Kd values: after Nielsen (2005); CM: chilled margin; Gb: gabbro; number of samples are shown in brackets; mineral abbreviations after Kretz (1983); FC: fractional crystallization according to equation of Rayleigh; D: bulk partition coefficient; -: not calculated