Table 2 Bulk chemical composition of the Lanzada metagabbroic eclogite

From: Eclogitic metagabbro from the Lanzada Window, eastern Central Alps: confirmation of subduction beneath the Malenco Unit

Major oxides Weight % oxides Weight % oxides Weight % oxides
Lanzada metagabbro (XRF) Lanzada metagabbro (anhydrous normalised) Average of 1317 gabbros (anhydrous normalised) and std. deviations (Le Maitre 1976)
SiO2 45.24 46.24 51.06 ± 4.56
TiO2 1.03 1.05 1.17 ± 1.00
Al2O3 14.57 14.90 15.91 ± 3.66
Fe2O3 11.13 6.13 3.10 ± 2.15
FeO – 4.72 7.76 ± 3.06
MnO 0.48 0.49 –
MgO 4.57 4.67 7.68 ± 3.48
CaO 17.74 18.13 9.88 ± 2.78
Na2O 3.00 3.07 2.48 ± 1.17
K2O 0.29 0.30 0.96 ± 0.85
P2O5 0.28 0.28 –
SO3 0.02 0.02 –
H2O 0.68 – –
Total 99.04 100.00 100.00
Trace elements (ppm): Lanzada metagabbro
 Sc 7.8 Sn 8.6
 V 153.0 Sb bd
 Cr 274.2 Te 27.0
 Co 66.7 I bd
 Ni 185.5 Cs 4.6
 Cu 60.6 Ba 54.9
 Zn 77.5 La 55.0
 Ga 22.6 Ce 103.1
 Ge 2.9 Nd 41.1
 As 5.7 Sm 8.8
 Se bd Yb bd
 Br bd Hf 6.9
 Rb 7.7 Ta bd
 Sr 489.3 Hg bd
 Y 45.6 Tl bd
 Zr 139.9 Pb 25.4
 Nb 13.0 Bi bd
 Mo 0.9 Th 14.5
 Ag bd U 5.3
 Cd bd   
CIPW Weight Norm: Lanzada metagabbro
 Plagioclase 39.77 Diopside 30.32
  An 25.53  Di 25.65
  Ab 14.24  Hd 4.67
 Orthoclase 1.77 Wollastonite 10.00
 Nepheline 6.57 Ilmenite 1.99
 Na2SO4 0.04 Magnetite 8.89
 Apatite 0.65   
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