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Table 1 Bulk composition and CIPW norm of representative oceanic gabbros and of starting material used in this study and in previous experimental studies

From: Melting carbonated epidote eclogites: carbonatites from subducting slabs

 

59-3

80-3

A1-2

593-ccb

59-3-ccb-CA

59-3-ccb-CB

OTB

SLEC1

SLEC3

OTBC

GA1cc

EC1

Witt

SiO2

49.26

48.10

38.16

43.84

35.13

33.83

52.38

41.21

41.69

47.23

45.32

30.11

45.60

TiO2

0.06

0.84

0.20

–

0.04

0.04

0.00

2.16

2.18

0.00

1.34

0.00

0.09

Al2O3

19.42

17.10

20.57

17.28

18.62

13.59

16.93

10.89

11.02

15.35

14.88

11.74

28.60

FeO

3.68

7.80

4.91

3.28

3.21

3.84

10.29

12.83

11.03

8.93

8.85

10.05

2.90

MnO

0.07

0.27

0.08

–

0.09

0.11

0.00

0.12

0.12

0.00

0.15

0.00

0.04

MgO

9.25

7.08

3.55

9.09

6.95

7.77

7.13

12.87

11.07

6.24

7.15

12.44

3.30

CaO

15.56

13.00

20.26

20.01

20.70

25.08

10.05

13.09

16.89

14.77

14.24

19.41

16.00

Na2O

1.70

2.42

2.46

1.51

1.46

1.74

3.21

1.63

1.40

2.91

3.14

0.87

1.60

K2O

0.01

0.02

0.09

0.01

0.01

0.01

0.00

0.11

0.10

0.02

0.40

0.00

0.12

CO2

0.00

0.00

8.10

4.84

10.05

13.51

0.00

5.00

4.42

4.43

4.40

15.38

0.00

H2O

0.00

0.00

0.96

0.38

3.74

0.48

0.00

0.00

0.00

0.06

0.50

0.00

0.00

Total

99.01

96.63

99.34

100.24

100.00

99.78

99.99

99.91

99.92

99.94

100.37

100.00

98.27

Mg/(Mg + Fe)

0.818

0.618

0.563

0.832

0.794

0.783

0.553

0.641

0.641

0.555

0.59

0.688

0.670

Ca/(Ca + Mg + Fe)

0.497

0.449

0.698

0.568

0.630

0.644

0.359

0.319

0.413

0.485

0.466

0.436

0.700

or

0.06

0.12

0.00

0.00

0.00

0.00

0.00

0.68

0.00

0.12

2.44

0.00

0.71

ab

15.11

22.38

0.00

0.00

0.00

0.00

28.67

5.04

0.00

17.20

10.61

0.00

13.98

an

44.87

36.81

49.00

41.51

50.14

33.23

31.62

23.14

24.61

29.99

26.21

32.53

71.04

lc

0.00

0.00

0.46

0.05

0.05

0.05

0.00

0.00

0.50

0.00

0.00

0.00

0.00

ne

0.00

0.00

14.49

8.37

8.92

10.65

0.00

6.18

7.90

6.02

11.10

5.42

0.30

di

25.23

23.70

17.12

37.42

4.96

4.05

14.38

35.95

46.74

37.12

39.40

0.00

7.05

hy

6.86

8.31

0.00

0.00

0.00

0.00

19.72

0.00

0.00

0.00

0.00

0.00

0.00

ol

6.18

4.96

4.81

6.77

16.02

19.19

4.05

21.84

11.62

7.91

5.09

28.63

5.08

mt

1.61

2.52

1.94

1.67

1.83

1.83

1.56

4.01

4.03

1.63

3.20

1.81

1.67

il

0.08

1.21

0.30

0.07

0.06

0.06

0.00

3.15

3.18

0.00

1.93

0.00

0.13

ap

0.00

0.00

0.46

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.04

wus

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

7.96

0.00

  1. 59-3 olivine gabbro from Southwest Indian Ridge (Meyer et al. 1989), A1-2 altered gabbro from Southwest Indian Ridge (Bach et al. 2001), 59-3-ccb bulk composition obtained from composition 59-3 by adding 11 wt.% calcite and 1.24 wt.% brucite, 59-3-ccb-CA bulk composition used in sandwich experiments adding Al(OH)3 and silica to composition 59-3-ccb, 59-3-ccb-CB this composition differs from 59-3-ccb-CA because of it volatile composition and therefore Al, and Si addition, OTB starting material used in Poli et al (2009), SLEC 1 and SLEC3 carbonated eclogite compositions (Dasgupta et al. 2005), OTBC hydrated and carbonated material used in Hammouda (2003), GA1cc composition used in Kiseeva et al (2012), EC1 composition used in Yaxley and Brey (2004), Witt composition as used by Wittenberg (1997)