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Table 1 Chemical analyses of the dated samples from the Sambuco and Maggia nappes

From: Timing of Palaeozoic magmatism in the Maggia and Sambuco nappes and paleogeographic implications (Central Lepontine Alps)

 

Pre-Variscan Basement

Variscan Granitoids

Variscan Lamprophyres

Coord.

682’130

694’390

694’394

686’387

686’260

694’120

679’130

688’342

688’360

688’854

688’100

695’470

695’850

688’854

678’775

678’740

688’390

142’950

146’379

146’421

147’145

147’130

148’510

139’212

147’130

147’230

144’389

147’500

138’655

136’900

144’389

139’150

139’125

147’395

Sample

DB04

DB25

DB26

DB38

DB61

DB66

DB12

DB19

DB23

DB30

DB77

DB06

DB44

DB29

DB41

DB42

DB76

Area rock

Zött para.

Massari ortho.

Massari diorite

Sasso Nero ortho.

Sasso Nero ortho.

Scheggia diorite

Tamier ortho.

Matorello grano.

Granitic dyke

Sassello ortho.

Matorello grano.

Rüscada aplite

Cocco grano.

Sassello

Tamier

Tamier

Laghetti

SiO2

69.04

73.24

58.37

71.28

76.03

60.11

69.24

67.96

66.14

68.22

68.41

68.50

67.40

50.30

56.60

46.17

52.66

TiO2

0.56

0.17

0.57

0.58

0.21

0.49

0.37

0.42

0.43

0.40

0.43

0.04

0.42

0.76

1.05

0.82

1.10

Al2O3

15.25

14.30

17.76

13.26

12.67

15.54

14.97

15.82

15.98

15.29

14.91

17.45

16.35

13.76

16.08

13.39

14.16

Fe2O3

4.37

1.62

6.19

4.10

1.39

7.68

2.87

3.77

3.97

3.63

3.83

0.35

3.66

8.45

6.60

7.40

8.43

MnO

0.07

0.03

0.11

0.06

0.01

0.12

0.04

0.08

0.08

0.07

0.09

0.00

0.05

0.18

0.13

0.15

0.14

MgO

1.98

0.29

3.67

1.51

0.49

3.93

1.41

1.26

1.98

1.64

1.13

0.15

1.17

9.04

3.69

8.37

9.47

CaO

1.03

1.04

7.22

1.13

0.81

7.23

1.25

3.42

2.37

2.09

3.07

0.56

4.24

7.76

5.78

8.03

6.96

Na2O

2.48

3.79

4.16

2.61

2.95

3.08

3.96

3.44

3.69

3.42

3.23

2.73

3.83

2.03

1.28

0.84

2.32

K2O

3.63

4.78

0.54

4.08

3.92

0.81

4.21

3.35

3.72

3.39

3.40

9.85

1.46

3.71

5.56

6.44

2.57

P2O5

0.14

0.18

0.13

0.17

0.14

0.08

0.12

0.13

0.13

0.11

0.13

0.12

0.13

0.21

0.32

0.27

0.26

LOI

1.60

0.34

0.45

0.68

0.65

0.59

0.96

0.44

0.57

0.86

0.51

0.45

0.33

2.91

2.04

7.30

1.41

TOTAL

100.15

99.78

99.17

99.46

99.25

99.65

99.39

100.10

99.07

99.11

99.15

100.19

99.02

99.10

99.14

99.19

99.48

Mg#

47

26

54

42

41

50

49

40

50

47

37

46

39

68

53

69

69

A/CNK

1.54

1.08

0.86

1.23

1.20

0.81

1.12

1.02

1.11

1.17

1.02

1.08

1.05

0.64

0.86

0.58

0.74

Cs

11.2

3.40

1.14

7.84

2.07

0.64

1.20

7.42

7.56

4.61

4.18

2.99

3.84

9.30

4.45

10.2

5.21

Rb

132

178

12.1

146

97.2

21.8

113

125

143

122

122

359

97.8

135

204

273

76.3

Ba

583

393

298

685

693

427

573

584

414

573

525

784

401

288

823

602

560

Sr

150

117

595

106

117

220

194

240

174

157

238

151

291

93.0

253

79.0

304

Th

10.6

8.88

0.902

13.3

6.14

1.27

7.95

8.90

12.1

13.1

14.8

1.08

10.9

3.88

6.39

2.34

4.68

U

2.29

2.42

0.633

3.22

2.25

1.22

1.14

2.42

2.74

2.98

3.69

5.61

2.13

1.72

1.13

0.410

0.923

Nb

8.91

8.20

2.59

11.5

3.68

2.93

9.20

9.80

10.5

10.1

11.3

1.58

8.44

6.85

15.6

6.24

12.9

Pb

9.99

25.6

3.79

18.8

22.6

2.83

9.47

15.3

13.1

13.8

20.6

49.8

11.2

10.2

15.3

8.94

4.43

Zr

161

89.6

83.9

215

77.1

100

134

137

141

143

143

40.5

155

88.8

330

74.7

204

Hf

4.54

2.39

2.09

6.38

2.09

2.62

3.18

3.53

3.88

3.70

3.77

1.35

3.90

2.24

7.48

2.37

4.87

Y

22.0

31.3

11.4

36.8

21.0

16.7

14.0

17.4

16.7

19.8

16.7

6.10

11.1

20.1

26.2

17.2

27.4

La

27.4

18.1

12.3

35.1

13.3

9.50

23.7

29.2

39.2

37.4

38.8

3.03

45.5

27.2

31.4

15.2

33.2

Ce

54.0

35.1

24.1

68.9

27.5

19.7

43.5

53.7

69.0

67.4

72.6

6.10

80.6

60.2

71.3

34.7

71.4

Pr

6.37

4.33

3.13

8.21

2.84

2.28

4.49

5.93

6.82

7.47

7.95

0.692

7.73

7.56

8.41

4.78

8.60

Nd

23.7

15.1

14.0

32.1

13.7

10.3

18.0

19.7

26.9

26.0

28.8

2.48

29.4

31.5

34.7

22.0

35.3

Sm

4.96

4.21

2.35

6.49

2.80

2.18

3.11

4.05

4.50

3.95

5.47

0.537

4.63

6.32

6.17

3.85

7.27

Eu

1.01

0.444

0.909

0.952

0.598

0.709

0.762

0.959

0.955

1.03

1.10

0.309

1.16

1.40

1.48

1.24

1.72

Gd

4.04

3.42

2.35

6.06

2.25

2.26

2.26

3.80

3.32

3.69

3.58

0.603

3.07

4.97

6.36

4.48

5.92

Tb

0.711

0.745

0.358

1.10

0.524

0.414

0.405

0.530

0.586

0.506

0.501

0.138

0.406

0.647

0.892

0.570

0.843

Dy

3.92

5.00

2.14

6.35

3.32

2.52

2.52

2.85

2.90

3.40

2.74

0.812

2.16

3.57

5.19

3.63

4.85

Ho

0.835

1.15

0.431

1.39

0.763

0.601

0.476

0.695

0.568

0.665

0.595

0.176

0.402

0.680

0.994

0.610

1.03

Er

2.05

2.63

1.10

4.03

1.96

1.52

1.37

1.53

1.68

1.80

1.51

0.335

0.978

2.13

2.71

1.81

2.79

Tm

0.364

0.315

0.142

0.493

0.285

0.208

0.204

0.213

0.221

0.252

0.239

0.060

0.143

0.292

0.393

0.277

0.378

Yb

2.42

2.22

1.16

3.62

1.89

1.82

1.87

1.66

1.69

1.86

1.96

0.391

1.01

2.06

2.64

2.00

2.53

Lu

0.275

0.207

0.142

0.498

0.253

0.240

0.159

0.256

0.251

0.312

0.260

0.062

0.131

0.297

0.363

0.231

0.384

Cr

61

6

59

38

12

71

21

16

14

15

17

4

13

491

65

238

559

Ni

15

7

27

20

6

24

8

6

4

4

4

7

4

119

21

107

238

Sc

11.0

4.29

17.3

10.8

4.46

27.3

6.41

9.31

8.74

8.36

8.05

2.41

8.93

28.1

21.2

27.5

23.9

V

73.3

13.8

129

61.6

21.7

188

42.4

53.4

54.2

53.7

51.7

11.6

54.2

202

151

170

169

Ga

18

17

20

17

11

16

16

18

18

18

18

14

18

17

23

17

19

Zn

53

34

68

64

21

67

43

59

51

53

53

10

56

116

99

115

101

  1. Major elements (in wt%) and trace-elements (in ppm) in italics measured by XRF, other trace-elements by LA-ICPMS (University of Lausanne)
  2. Mg number and Aluminium saturation index (A/CNK) in molar. Coordinates of the swiss topographic grid
  3. grano. granodiorite, ortho. orthogneiss, para. paragneiss