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Progress in Earth and Planetary Science

Table 3 Average compositions of minerals from dyke-type rodingite(131019–2), serpentinite and reaction zones

From: Interplay of irreversible reactions and deformation: a case of hydrofracturing in the rodingite–serpentinite system

  Dyke-type rodingite (131019–2) Reaction zone 1 Reaction zone 2 Serpentinite
Di Chl Grta Grtb Ves Di Chl Ves Prv Di Chl Srp Di Chl
n = 12 n = 8 n = 6 n = 4 n = 22 n = 4 n = 4 n = 13 n = 12 n = 2 n = 9 n = 4 n = 8 n = 9
SiO2 55.07 28.17 38.14 37.05 36.53 54.10 31.70 34.34 – 54.92 32.04 42.75 55.41 34.85
TiO2 – – 1.91 2.75 2.00 – – 3.89 57.05 – – – – –
Al2O3 – 19.05 18.61 12.29 14.82 0.38 15.95 6.06 – – 14.56 1.39 – 11.50
Cr2O3 – – – – – – – – – – – – – 0.42
Fe2O3 – – 4.67 11.45 – – – – – – – – – –
FeO 1.38 12.33 – – 4.18 4.80 5.56 15.95 0.51 1.26 4.51 3.11 0.64 3.81
MgO 17.40 23.62 – – 2.45 15.31 30.86 0.85 – 17.5 31.06 37.12 17.98 34.43
CaO 26.19 0.27 35.62 35.89 36.11 25.30 – 34.00 40.55 25.89 – – 26.29 –
Total 100.04 83.44 98.95 99.43 96.09 99.89 84.07 95.09 98.11 99.57 82.17 84.37 100.32 85.01
    apfu     apfu    apfu    apfu  
O 6 28 12 12 78 6 28 78 3 6 28 116 6 28
Si 2.00 5.81 2.94 2.94 19.24 2.00 6.24 19.66 – 2.00 6.41 34.01 2.00 6.73
Ti –   0.11 0.17 0.79 – – 1.69 0.99 – – – – –
Al – 4.63 1.69 1.15 9.20 0.02 3.70 3.96 – – 3.44 1.33 – 2.62
Cr – – – – – – – – – – – – – 0.07
Fe3+ – – 0.27 0.68 – – – – – – – – – –
Fe2+ 0.04 2.13 – – 1.84 0.15 0.92 7.75 0.01 0.04 0.76 2.07 0.02 0.61
Mg 0.94 7.26 – – 1.92 0.85 9.05 0.71 – 0.95 9.26 44.00 0.97 9.91
Ca 1.02 0.06 2.94 3.05 20.37 1.00 – 20.87 1.00 1.01 – – 1.02 –
Σcation 4.00 19.83 7.95 7.99 53.36 4.02 19.91 54.64 2.00 4.00 19.87 81.41 4.01 19.94
XMg 0.96 0.77     0.86 0.91    0.96 0.92 0.96 0.98 0.94
XGrs    0.86 0.63           
XAdr    0.14 0.37           
  1. aFe3 + −poor garnet
  2. bFe3 + −rich garnet
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