Table 4 Open in new tab Continued Sample...

Table 4

Open in new tab

Continued

Sample

AJ-53

AJ-54

AJ-58

AJ-77

AJ-81

AJ-82

V.C.

Manadas

SiO₂ wt%

46.22

46.27

46.99

47.68

45.31

44.56

TiO₂

3.66

3.56

3.47

3.23

3.55

3.90

Al₂O₃

17.04

16.96

16.57

16.93

15.66

15.80

Fe₂O₃

12.74

12.37

12.38

11.97

12.55

13.09

MnO

0.18

0.19

0.17

0.18

MgO

5.46

5.29

6.00

4.94

8.67

7.38

CaO

8.97

8.85

8.74

8.33

10.15

9.99

Na₂O

3.94

3.98

3.92

4.42

3.16

3.41

K₂O

1.45

1.49

1.38

1.69

1.16

1.19

P₂O₅

0.85

0.82

0.67

0.95

0.51

0.63

Total

100.51

99.77

100.30

100.33

100.89

100.13

L.O.I.

−0.30

−0.60

−0.10

−0.58

−0.51

−0.57

Mg# (0.18)

49.69

49.64

52.77

48.75

61.42

56.51

Sc ppm

250

120

132

Ba (ICP-MS)

337

294

325

396

277

279

7.7

5.8

6.6

8.5

5.8

5.7

62.1

54.1

56.9

77.8

48.9

53.8

26.3

24.9

27.0

36.5

24.1

23.8

840

750

715

828

625

677

4.0

3.3

3.4

5.0

2.8

3.7

4.0

2.9

3.2

5.9

3.2

2.9

1.3

1.2

1.7

1.3

1.2

307

267

291

392

263

269

32.1

28.9

29.5

34.2

24.3

26.0

36.7

32.0

33.0

46.9

28.0

29.1

82.0

72.4

76.7

108

64.9

69.7

11.0

9.54

9.89

13.6

8.14

8.71

50.0

41.5

43.3

56.8

36.1

39.2

9.30

8.37

8.62

11.6

7.79

8.18

3.01

2.68

2.67

3.43

2.41

2.65

8.71

7.81

7.76

10.3

7.18

7.80

1.25

1.16

1.14

1.51

1.03

1.12

6.64

6.11

6.10

7.90

5.44

5.73

1.07

1.04

1.05

1.25

0.87

0.99

3.06

2.76

2.88

3.54

2.60

2.72

0.40

0.37

0.49

0.32

0.36

2.50

2.34

2.27

2.82

2.12

2.21

0.34

0.30

0.34

0.40

0.27

0.31

0.8

1.2

0.5

1.1

0.4

1.3

⁸⁷Sr/⁸⁶Sr

0.703439

0.703414

¹⁴³Nd/¹⁴⁴Nd

0.512943

0.512949

epsilon Nd

5.95

6.06

²⁰⁶Pb/²⁰⁴Pb

19.885

19.921

²⁰⁷Pb/²⁰⁴Pb

15.635

15.634

²⁰⁸Pb/²⁰⁴Pb

39.378

39.316

The complete data for all samples are reported in the Electronic Appendix 2. Major elements and Cr and Ni are XRF data, other trace elements were obtained by ICP-MS analysis. LOI is loss on ignition at 1000 °C. Mg# is defined as 100* (Mg)/(Mg+Fe²⁺), where the Fe³⁺/Fe²⁺ ratio = 0.18. Isotopic compositions are measured values. Uncertainties for ⁸⁷Sr/⁸⁶Sr and ¹⁴³Nd/¹⁴⁴Nd are less than 0.00003 and 0.000014, respectively. Uncertainties on Pb isotopic compositions are less than 0.005.

This Feature Is Available To Subscribers Only