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Progress in Earth and Planetary Science

Table 2 Average compositions of minerals from dyke-type rodingite and metagabbro

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

  Dyke-type rodingite131018-1B Metagabbro 131019-MG
  Di Grt1a Grt 2b Chl Di Chl Ttn Ep
  n c = 10 n = 7 n = 10 n = 6 n = 5 n = 3 n = 3 n = 13
SiO2 54.66 39.26 39.95 29.69 53.32 29.81 30.75 39.26
TiO2 – 0.15 – – – – 38.47 –
Al2O3 1.18 18.04 21.49 21.18 2.01 20.25 1.19 29.10
Fe2O3 – 5.85 1.34 – – – – 5.40
FeO 2.59 – – 3.77 4.93 4.55 0.41 –
MnO – 0.50 – – – 0.19 – –
MgO 16.81 – – 29.70 15.61 29.48 – –
CaO 24.80 36.17 36.96 0.09 23.72 – 29.10 24.68
Na2O – – – – 0.44 – – –
Total 100.04 99.97 99.74 84.43 100.03 84.28 99.92 98.44
   apfu     apfu   
O 6 12 12 28 6 28 5 12.5
Si 1.98 3.01 3.01 5.76 1.95 5.82 1.00 3.02
Ti – 0.01 – – – – 0.95 –
Al 0.05 1.63 1.91 4.84 0.09 4.66 0.05 2.64
Fe3+ – 0.34 0.08 – – – – 0.31
Fe2+ 0.08 – – 0.61 0.15 0.74 0.01 –
Mn – 0.03 – – – 0.03 – –
Mg 0.91 – – 8.59 0.86 8.58 – –
Ca 0.96 2.97 2.98 0.02 0.93 – 1.02 2.03
Na – – – – 0.03 – – –
Σcation 3.98 7.99 7.98 19.82 4.01 19.83 3.03 8.00
XMg 0.92 – – 0.93 0.85 0.92 – –
XSps – 0.01 – – – – – –
XGrs – 0.82 0.96 – – – – –
XAdr – 0.17 0.04 – – – – –
  1. aGrt1: Fe-rich garnet
  2. bGrt2: Fe-poor garnet
  3. cn: number of analyzed grains
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