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Swiss Journal of Geosciences

Table 3 The results of melting and mixing model calculations

From: Subduction-related mafic to felsic magmatism in the Malayer–Boroujerd plutonic complex, western Iran

 

Gabbros and gabbro-dioritic dykes

Diorites →

1

2

3

4

5

6

7

8

9

10

 

Mantle wedge

  

Deep crust

     
 

Mixing

 

Melting

FC

FC

Melting

Mixing

 

Ab: 0.55F/0.45M

EMc: 80% PM + 20% A

NMBMd

Residual meltf

Residual solidg

LCC

Protolith

MFM*

 

Hybrid zone

PMa

  

Be: Fmel = 0.15

fcry = 0.45

fcry = 0.35

amphibolite

D hM

fmel = 0.25

fmix = 0.2i

Rb

0.63

71.04

4.16

27.28

54.95

8.83

24.0**

0.2

37.80

42.94

Ba

6.99

1019.20

57.60

379.26

722.95

211.27

388.0**

0.3

660.46

679.20

Th

0.09

5.10

0.34

2.22

4.91

0.81

5.0**

0.12

5.28

5.17

U

0.02

1.11

0.08

0.50

1.10

0.03

1.5**

0.02

0.00

0.33

Nb

0.71

4.64

0.91

6.01

13.08

0.39

2.3**

1.13

2.11

5.40

K

249.98

21,038.38

1289.40

8164.83

12,407.93

6288.82

11,050**

0.14

13,021.6

12,837.50

La

0.69

16.72

1.49

9.44

18.11

5.76

5.1**

1.17

4.55

8.62

Ce

1.77

34.55

3.41

20.76

39.35

12.01

22.30***

1.27

18.72

24.91

Pr

0.28

1.64

0.34

2.01

3.84

1.31

3.40***

2.51

1.61

2.28

Sr

21.10

473.80

43.73

264.40

514.15

137.15

495**

1.5

364.19

409.18

P

94.98

486.66

114.56

654.94

1438.91

10.36

3317.10***

–

–

–

Nd

1.35

15.51

2.06

11.41

20.49

6.33

11.0**

2.86

4.64

9.40

Zr

11.20

254.15

23.35

129.59

273.12

24.20

47.0**

0.25

79.32

137.46

Sm

0.44

2.79

0.56

2.77

4.78

1.84

5.0**

4.24

1.47

2.46

Eu

0.17

0.61

0.19

0.90

1.26

0.87

1.80***

4.13

0.54

0.76

Ti

1300.24

1922.51

1331.36

5682.87

10,353.85

2710.66

12,365***

4.92

3163.66

5320.72

Dy

0.74

1.60

0.78

3.11

4.88

1.78

7.80***

6.33

1.57

2.56

Y

4.55

8.81

4.77

15.10

29.65

7.36

28.0**

1.88

17.08

20.85

Yb

0.49

0.72

0.50

1.34

2.40

0.50

3.1**

4.94

0.79

1.27

Lu

0.07

0.10

0.08

0.18

0.32

0.06

0.70***

4.24

0.21

0.24

 

Shallow crust

11

12

13

14

15

16

S-type granites

Diorites

I-type granites

UCC

Bulk D kM for Melting

Melting

Bulk Dl for FC

AFCm

Mixingn

Protolith

MFM*

R = 0.4

(C9 + C13)O

greywackej

fmel = 0.2

fcry = 0.65

fmix = 0.3

Rb

72.0

1.43

53.82

1.31

62.72

42.60

Ba

426.0

2.34

206.69

2.19

354.28

524.33

Th

9.0

0.1

12.55

0.12

16.14

7.46

U

2.0

0.05

0.51

0.49

2.21

0.15

Nb

8.4

1.42

6.32

1.47

9.21

3.37

K

16,602.8

0.87

18,481.58

0.85

30,224.30

14,659.59

La

34.0

0.16

66.33

0.45

39.87

23.08

Ce

58.0

0.16

111.37

0.57

78.00

46.52

Pr

6.1

0.12

9.98

0.72

8.46

4.12

Sr

201.0

0.96

207.44

2.73

158.07

317.17

P

567.3

–

–

–

–

–

Nd

25.0

0.14

44.78

0.80

33.91

16.68

Zr

302.0

0.06

177.64

0.12

673.97

108.82

Sm

4.6

0.14

8.46

0.98

6.73

3.57

Eu

1.2

0.6

1.72

2.05

1.30

0.90

Ti

4315.2

0.02

5.68

0.85

7663.59

2216.27

Dy

3.4

0.17

6.71

1.26

5.15

3.11

Y

26.0

0.77

31.67

1.52

23.11

21.46

Yb

2.1

0.16

4.09

0.98

3.49

1.78

Lu

0.4

0.16

0.72

0.87

0.50

0.36

  1. Mixing equation is from Langmuir et al. (1978); Abbreviations are fmel: degree of melting, fcry: degree of fractionation, fmix: degree of mixing
  2. aPM: primitive mantle composition (Sun and McDonough 1989)
  3. bA = Subduction sediment-derived fluids/melts. The parameters used in modeling are: normalizing values from Sun and McDonough 1989, Bulk subducted sediment composition (BOS) are from Plank and Langmuir 1998, sediment fluid partition coefficients (DSF) from Johnson and Plank (1999). Sediment melt (SM) calculated by 5% modal fractional melting of bulk subducted sediment, sediment fluids (SF) composition calculated using BOS and DSF(CBOS/DSF)
  4. cMiddle Jurassic Enriched Mantle
  5. dNMBM: Non-Modal Batch Melting
  6. e B = 15% partial melting of metasomatised garnet-spinel Lherzolite (Supplementary Item 3, Table S1)
  7. fResidual melt of fractional crystallization of 0.2 Ol + 0.05 Cpx + 0.45 Pl + 0.3 Am from B1-magma
  8. gResidual solid of Fractional crystallization of 0.05 Cpx + 0.75 Pl + 0.2 Am ± 0.02 Apt from B1-magma
  9. hDM: Bulk Kd-values for amphibolite (0.7 Am + 0.3 Pl)
  10. iMixing between amphibolite partial melt and partially crystallized mantle-derived magma (f)
  11. jUpper crust-greywacke composition is from Wedepohl, 1995 (35%Qtz + 30%Bio + 15% Plg + 5% Alk + 15% Mus)
  12. kDM: bulk partition coefficients used in modal fractional melting of greywacke source are calculated for 0.35Qtz + 0.15Pl + 0.3Bt + 0.05Afd + 0.15Mus, Kd values for basaltic melt are taken from Rollinson 1993
  13. lAFC: assimilation fractional crystallization of (EM + LCC-derived melt)
  14. mProportions of subtracted phases: 3%Qz + 25%Bt + 55% Pl + 5% Afd + 10% Am + 2% (Zr + Apt + Mt)
  15. nMixing between LCC-derived amphibolitic melt and upper crustal melt (greywacke partial melt) in ratio of 0.7/0.03 for I-type granites
  16. OColumn « 9 » + column « 13 »
  17. * MFMmodal fractional melting
  18. ** Tatsumi (2000)
  19. *** Kogiso et al. (1997)
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