Table 1 Major and trace element composition of petit-spot basalts

Dive

6K#1466

6K#1466

No

R7-001

R7-003

wt%

SiO₂

39.40

39.27

Al₂O₃

11.41

11.46

Fe₂O₃(T)

16.80

16.56

MnO

0.21

0.20

MgO

9.34

7.66

CaO

11.19

10.02

Na₂O

2.15

2.29

K₂O

1.65

2.08

TiO₂

3.82

3.68

P₂O₅

1.08

1.12

Total

99.73

100.60

Mg#

52.42

47.82

K₂O/Na₂O

0.77

0.91

LOI

2.68

6.29

μg/g

Sc

25

25

Be

2

2

V

353

324

Ba

453

317

Sr

577

307

Y

37

58

Zr

259

248

Cr

200

190

Co

61

57

Ni

200

140

Cu

90

90

Zn

180

200

Ga

20

18

Ge

1

2

As

< 5

5

Rb

26

32

Nb

65

64

Mo

2

< 2

Ag

0.8

1

In

< 0.2

< 0.2

Sn

2

2

Sb

< 0.5

0.6

Cs

< 0.5

< 0.5

La

65.2

90.8

Ce

138

164

Pr

16.6

23.8

Nd

62.6

89.3

Sm

12

17.6

Eu

3.76

5.38

Gd

10.7

15.7

Tb

1.5

2.3

Dy

8

12.2

Ho

1.3

2.1

Er

3.3

5.3

Tm

0.44

0.69

Yb

2.6

4.1

Lu

0.36

0.6

Hf

5.8

6.2

Ta

4.8

5.3

W

< 1

< 1

Tl

0.8

0.3

Pb

< 5

6

Bi

< 0.4

< 0.4

Th

6.9

7.7

U

1.4

1.4