Type of rock

Name

Sample

High Mg Nb-enriched basalts (LMg-NB)

Low Mg Nb-enriched basalts (LMg-NB)

Basanite

Basalt

Basalt

Hawaiite

Mugearite

BAF 22

BAF 42

BAF 18

BAF36

BAF 2

BAF3

BAF37

Position

µ

µ

µ

µ

µϕ

µ

µ

µϕ

µϕ

ϕ

µ

ϕ

µ

23/1

29/1

83/1

123/1

51/1

42/1

48/1

103/ 1

105/1

114/1

111/1

71/1

61/1

SiO2

0.10

0.03

0.25

0.05

0.06

0.05

0.12

0.06

0.04

0.12

0.09

0.06

0.10

Al2O3

2.57

2.55

4.75

2.07

3.30

1.32

3.26

1.81

1.72

2.56

1.61

1.50

1.51

TiO2

25.14

24.86

22.90

21.89

22.79

25.99

22.20

26.17

26.15

21.79

23.05

20.38

19.93

FeO

65.30

65.30

62.85

68.56

66.16

67.28

66.62

67.06

67.96

69.56

69.91

73.37

72.90

MnO

0.72

0.76

0.58

0.60

0.59

0.71

0.56

0.71

0.80

0.70

0.71

0.72

0.79

MgO

3.69

3.07

5.07

3.23

3.79

1.98

4.09

2.20

2.22

2.70

2.37

1.50

1.11

CaO

0.19

0.14

0.22

0.13

0.02

0.16

0.05

0.00

0.00

0.00

0.00

0.01

0.05

Cr2O3

0.27

0.25

0.37

0.40

0.58

0.14

0.46

0.00

0.00

0.00

0.00

0.00

0.00

NiO

0.03

0.09

0.04

0.00

0.02

0.00

0.00

0.00

0.00

0.00

0.00

0.00

0.00

Na2O

0.02

0.02

0.00

0.00

0.07

0.01

0.00

0.00

0.00

0.00

0.06

0.05

0.00

K2O

0.02

0.01

0.00

0.01

0.01

0.03

0.00

0.01

0.00

0.00

0.00

0.00

0.00

P2O5

0.00

0.00

0.00

0.03

0.02

0.02

0.05

0.00

0.00

0.00

0.00

0.00

0.00

TOTAL

97.76

96.84

96.66

96.57

96.84

97.57

96.95

98.04

98.88

97.44

97.81

97.60

96.41

Formula based on 24 cations and 32 oxygen atoms

Si

0.0288

0.0098

0.0702

0.0138

0.0173

0.0161

0.0334

0.0189

0.0115

0.0357

0.0266

0.0162

0.0296

Al

0.8739

0.8790

1.5938

0.7150

1.1213

0.4604

1.1056

0.6259

0.5905

0.8803

0.5561

0.5207

0.5331

Ti

5.4512

5.4690

4.9067

4.8125

4.9431

5.7678

4.8071

5.7701

5.7176

4.7773

5.0695

4.5140

4.4845

Fe3+

4.1182

4.1202

4.3707

5.5436

4.8691

3.9591

5.1086

3.8008

3.9513

5.4937

5.2875

6.4496

6.4400

Cr

0.0626

0.0576

0.0829

0.0930

0.1333

0.0328

0.1048

0.0000

0.0000

0.0000

0.0000

0.0000

0.0000

Fe2+

11.6264

11.8562

10.6052

11.2217

11.0879

12.6452

10.9335

12.6415

12.5721

11.4657

11.8135

11.6236

11.7992

Mg

1.5842

1.3397

2.1540

1.4060

1.6283

0.8715

1.7539

0.9612

0.9601

1.1737

1.0334

0.6605

0.4954

Mn

0.1751

0.1892

0.1398

0.1481

0.1443

0.1776

0.1369

0.1769

0.1968

0.1737

0.1766

0.1808

0.2013

Ni

0.0065

0.0220

0.0084

0.0000

0.0035

0.0000

0.0000

0.0000

0.0000

0.0000

0.0000

0.0000

0.0000

TOTAL

24

24

24

24

24

24

24

24

24

24

24

24

24

USP

90

88

88

83

85

89

85

89

89

81

83

75

75

Sp

4

4

7

3

5

2

5

2

2

4

2

2

2

Mt

6

8

5

13

11

9

10

8

9

15

14

22

23