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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

 Â