Table 4 Calculated results of diffusional fractionation of Li isotopes in immiscible Si-melts.

From: Non-traditional stable isotope behaviors in immiscible silica-melts in a mafic magma chamber

Run

T (°C)

SiO2

βLi

NBO/Tsi-melt

KLi

DLi/Dsi

γ1

α(1/2+1/2)

δ7Li(1/2+1/2)

γ2

α(2/3+1/3)

δ7Li(2/3+1/3)

SI-13

1020

60.4

0.215

0.45

1.35

1605.15

0.01

0.433

1.16

0.01

0.242

1.09

SI-7

1006

69.1

0.215

0.19

1.84

1863.27

0.01

0.433

1.26

0.01

0.242

1.15

SI-5

1006

64.4

0.215

0.32

1.53

1863.27

0.01

0.433

1.20

0.01

0.242

1.11

SI-8

963

70.9

0.215

0.18

1.87

3008.58

0.01

0.433

1.21

0.00

0.242

1.12

SI-9

938

72.6

0.215

0.12

2.22

4037.70

0.01

0.433

1.22

0.00

0.242

1.12

M-9

1020

63.8

0.215

0.40

1.41

1605.15

0.01

0.433

1.18

0.01

0.242

1.10

M-4

1006

73.1

0.215

0.16

1.95

1863.27

0.01

0.433

1.28

0.01

0.242

1.16

M-5

1005

69.7

0.215

0.25

1.68

1883.46

0.01

0.433

1.23

0.01

0.242

1.13

M-6

963

74.4

0.215

0.14

2.08

3008.58

0.01

0.433

1.24

0.00

0.242

1.13

M-7

938

74.8

0.215

0.10

2.34

4037.70

0.01

0.433

1.23

0.00

0.242

1.13

I-3

1005

62.4

0.215

0.46

1.34

1883.46

0.01

0.433

1.15

0.01

0.242

1.08

I-5

964

76.2

0.215

0.12

2.19

2974.12

0.01

0.433

1.25

0.00

0.242

1.14

S-6

1023

65

0.215

0.33

1.51

1555.32

0.01

0.433

1.21

0.01

0.242

1.12

S-3

1005

63.6

0.215

0.37

1.46

1883.46

0.01

0.433

1.18

0.01

0.242

1.10

S-5

1006

66.8

0.215

0.30

1.56

1863.27

0.01

0.433

1.21

0.01

0.242

1.12

  1. Note: βLi: Li diffusional fractionation factor is from Richter, et al.41. NBO/Tsi-melt: the ratio of NBO (non-bridging oxygen) to T (tetrahedron) of the Si-melt. KMg: partition coefficient of Li between two immiscible silicates melt. KLi = 1.0091(NBO/Tsi-melt)−0.364 is obtained by fitting experimental data of Veksler, et al.54. DLi/Dsi: ratio of diffusivity of Li over Si in basaltic melt is from Zhang, et al.55. α (1/2+1/2): calculated α value with the bulk melt = C∞ (1/2+1/2). γ1: calculated γ value using α (1/2+1/2). δ7Li (1/2+1/2): calculated δ7Li with the bulk melt = C∞ (1/2+1/2) and initial δ7Li = 1 is assumed. α (3/3+1/3): calculated α value with the bulk melt = C∞ (2/3+1/3). γ2: calculated γ value using α (3/3+1/3). δ7Li (2/3+1/3): calculated δ7Li with the bulk melt = C∞ (2/3+1/3) and initial δ7Li = 1 is assumed.
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