Table 2 Atlantis Bank seafloor samples (N = 937)

Metaperidotite

115

43.4

2.3

1.5

Plagioclase peridotite

9

3.4

1

0.5

Lherzolite

108

40.8

0.7

0.8

Harzburgite

10

3.8

1

0.5

Talc-soapstone-serpentinite-tremolite schist and breccia

23

8.7

nd

nd

Total peridotites

265

28.3

1.4

1.4

Olivine websterite

6

0.6

0.8

0.8

Dunite

3

0.3

nd

nd

Troctolite

1

0.2

0.7

na

Olivine gabbro

156

33.9

1.2

1.2

1.2

1.4

Gabbro

36

7.8

1.8

1.1

2.2

1.8

Gabbronorite

21

4.6

1.6

0.7

0.7

0.4

Oxide gabbro

183

39.8

1.8

1.5

0.8

1

6.7

1.5

Metagabbro

41

8.9

2.3

1.3

2.3

1.6

Felsic vein/plagiogranite

22

4.8

0.5

0.8

0.6

0.7

Total gabbros

460

49.1

Aphyric diabase

86

56.2

Olivine diabase

5

3.3

Plagioclase-olivine diabase

18

11.8

Plagioclase diabase

44

28.8

Total diabase

153

16.3

0

0

1.7

1.3

Aphyric basalt

20

44.4

Olivine basalt

7

15.6

Plagioclase-olivine basalt

11

24.4

Plagioclase-olivine augite basalt

1

2.2

Plagioclase basalt

6

13.3

Total basalt

45

4.8

Pillow basalt

19

Mafic mylonite/cataclasite

3

0.3

Oxidized sulfide chimney

2

0.2