Table 1 Summary of key information on the sub-cratonic lithosphere. Data is shown for individual locations with more than eight data points.

NAC

2.7–3.1

All

88

0.33

92.7

92.7

3.32

88.2

88.0

1.160

1.167

1.210

57

0.091

43

Garnet bearing

10

0.32

92.2

92.7

0.55

81.92

77.0

1.103

1.088

1.067

71

1.189

29

Garnet free

78

0.33

92.7

89.2

3.59

89.03

89.8

1.167

1.170

1.213

61

1.105

39

Ubekendt Ejland

West Greenland

alkali basalt

27

0.34

92.6

92.7

8.04

97.13

98.1

1.225

1.230

1.227

100

-

-

Wiedemann Fjord

East Greenland

alkali basalt

39

0.33

92.9

92.9

0.91

83.54

84.7

1.128

1.132

1.133

100

-

-

Sarfartoq

Southwest Greenland

kimberlite

20

0.30

92.2

92.6

0.60

86.24

85.5

1.146

1.145

1.196

57

1.088

43

Kaapvaal

2.8

All

139

0.30

92.6

92.6

0.42

67.30

65.3

0.991

0.977

1.115

30

0.959

70

Garnet bearing

108

0.30

92.5

92.5

0.34

66.57

65.0

0.987

0.971

1.098

33

0.949

67

Garnet free

31

0.30

92.8

92.9

0.71

67.69

66.7

1.002

1.002

1.160

26

0.983

74

Finsch

Kimberley block

kimberlite

33

0.31

92.2

92.1

0.46

77.75

81.4

1.052

1.062

1.116

58

0.958

42

Kimberley

Kimberley block

kimberlite

53

0.30

92.7

92.8

0.49

64.12

64.0

0.966

0.964

0.944

69

1.114

31

Premier

Witwatersrand terrane

kimberlite

8

0.28

91.5

92.0

0.29

64.75

64.0

0.957

0.957

-

-

-

-

Jagersfontein

Witwatersrand terrane

kimberlite

12

0.27

92.7

93.0

0.32

70.11

68.0

1.016

0.997

-

-

-

-

Lesotho

Witwatersrand terrane

kimberlite

29

0.30

92.8

92.9

0.35

62.79

62.4

0.953

0.953

0.957

100

-

-

Siberia

2.9

All

60

0.30

92.2

92.4

0.51

75.27

77.2

1.037

1.060

1.104

54

0.961

44

Garnet bearing

18

0.30

91.8

92.2

0.39

75.49

79.2

1.037

1.066

1.083

58

0.978

42

Garnet free

42

0.30

92.4

92.5

0.62

75.17

76.3

1.036

1.059

1.115

54

0.957

44

Obnazhennaya

Northern Siberian

kimberlite

8

0.29

91.2

92.1

0.42

70.40

70.6

0.937

0.931

-

-

-

-

Udachnaya

Central Siberian

kimberlite

52

0.30

92.4

92.5

0.55

77.04

82.5

1.052

1.078

1.109

54

0.973

46

Slave

2.6–2.75

All

50

0.30

91.9

92.1

0.55

73.24

75.0

1.013

1.015

0.970

50

1.071

50

Garnet bearing

41

0.30

91.6

91.8

0.46

72.60

74.3

1.002

1.005

0.981

66

1.069

34

Garnet free

9

0.29

92.9

92.9

0.97

75.95

78.3

1.060

1.086

-

-

-

-

Jericho

Northern Slave

kimberlite

17

0.29

91.7

92.2

0.42

71.98

70.5

0.998

0.991

-

-

-

-

Lac de Gras

Central Slave

kimberlite

33

0.30

92.0

92.0

0.62

73.78

76.5

1.020

1.027

-

-

-

-

Gahcho Kué

Southern Slave

kimberlite

18

0.31

91.9

91.9

0.65

76.82

77.5

1.036

1.026

-

-

-

-

Rae

2.75

All

50

0.31

91.4

92.1

0.45

73.44

74.2

1.016

1.029

1.052

73

0.943

27

Garnet bearing

45

0.31

91.4

83.7

0.38

73.70

74.4

1.015

1.033

1.042

75

0.934

25

Garnet free

5

0.31

91.8

0.0

1.05

71.15

71.9

1.024

1.024

-

-

-

-

Somerset Island

Northern Rae

kimberlite

50

0.31

91.4

92.1

0.45

73.44

74.2

1.016

1.029

1.039

80

0.930

20

Tanzania

2.5–2.9

All

38

0.31

92.5

92.4

1.38

82.79

83.9

1.105

1.107

1.200

49

1.100

51

Garnet bearing

14

0.26

92.4

92.4

0.42

73.45

73.7

1.030

1.030

-

-

-

-

Garnet free

24

0.32

92.5

92.5

1.93

88.24

88.6

1.148

1.135

1.209

38

1.108

62

Labait

Eastern craton margin

melilitite

8

0.30

92.2

92.4

0.75

81.24

78.0

1.100

1.096

-

-

-

-

Lashaine

Eastern craton margin

Ankaramite, carbonatite

26

0.30

92.3

92.3

0.82

81.03

83.3

1.086

1.096

1.136

70

0.996

30