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Heritage Science

Table 2 Trace element composition (in ppm) of obsidian samples (SA: Sardinia site A; SC: Sardinia site C;) investigated and used for identifying the provenience of the two obsidian tesserae (samples 12 and 14)

From: Obsidian use in the mosaic of the St. Juvenal church, Narni (Italy): chemical characterization and origin

 

14

12

SA

SA

SA

SA

SA

SA

SC

SC

SC

SC

SC

SC

Lipari

Lipari

Lipari

Lipari

Lipari

Lipari

Lipari

Lipari

Lipari

Na %

3.04

3.11

2.64

2.91

2.29

2.33

2.42

2.775

2.26

2.66

1.94

2.10

2.46

2.37

2.84

3.19

2.39

2.29

2.68

1.87

2.51

2.96

3.41

Sc

3.51

3.47

4.2

4.7

4.51

4.31

5.23

4.45

3.55

4.05

2.7

3.06

3.8

3.88

1.18

1.3

0.95

0.92

1.09

1.42

1.23

1.33

1.43

Fe %

1.97

2.01

0.87

1.07

0.95

0.88

1.08

0.97

1.29

1.46

0.92

0.99

1.375

1.27

1.37

1.57

0.86

0.84

1.16

0.92

1.36

1.445

1.53

Zn

92.2

93.1

  

66.6

62

67.2

   

46

49

 

54

  

54.5

53.7

 

58.4

   

Sb

0.47

0.55

  

0.05

0.17

0.19

   

0.04

  

0.15

  

0.94

0.97

 

1.11

   

La

34.4

34.7

22.2

24.5

22.9

21.1

20.9

23.35

60.4

66.8

56

56

63.6

62.2

57

66

49.7

53.6

56.6

50.6

55

64

73

Ce

135

138

46

56

58.2

50.6

62.6

51

120

170

0.78

0.67

145

0.83

110

160

95.5

100.9

116.6

102.2

130

150

170

Nd

45

51

  

18.7

17.3

14.8

   

34.3

26.3

 

16.1

  

16.7

22.4

 

21.9

   

Sm

9.82

9.78

5.5

6.1

5.12

4.85

5.32

5.8

6.5

8

6.42

6.41

7.25

7.49

6.8

7.7

5.24

5.94

6.42

5.72

7.2

7.95

8.7

Eu

1.69

1.66

0.2

0.6

0.35

0.32

0.35

0.4

1.2

1.4

0.86

0.81

1.3

1.02

0.1

0.2

0.08

0.09

0.118

0.09

0.1

0.15

0.2

Tb

0.96

0.93

   

0.63

0.72

    

0.57

 

0.61

  

0.53

0.76

 

0.67

   

Yb

10.9

10.6

   

0.04

0.05

    

0.02

 

0.03

  

0.05

0.05

 

0.05

   

Rb

129.7

129.2

  

229

201

245

   

95.4

120.5

 

149.7

  

221

217

 

228

   

Cs

1.64

1.60

3.7

4.6

4.25

3.72

4.67

4.15

2

2.8

1.42

1.7

2.4

2.02

16.5

20.2

15

15.7

16.8

15.4

17.7

18.85

20

Ba

506

610

  

287

132

216

    

621

 

823

  

1436

1285

 

3813

   

Hf

16.5

16.1

3.1

4.1

 

3.85

2.77

3.6

6

8.2

 

6.26

7.1

8.11

5.9

9.3

6.84

7.18

7.30

7.13

5.7

7.55

9.4

U

3.88

3.80

17

17

3.38

2.55

2.61

17

1

3.2

1.42

1.12

2.1

1.67

23

24

4.96

6.09

14.5

5.66

15

20

25

Th

13.1

12.7

16

21

 

12.3

15.2

18.5

30

39

 

16.4

34.5

21.4

42

63

36.7

37.5

44.8

36.9

54

64

74

Ta

8.13

8.26

   

2.77

3.43

    

1.27

 

1.63

  

1.46

1.5

 

1.5

   
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