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Table 3 The chemical compositions and lead isotope ratios of the Kaiyuan Tongbao coins from Lafu Queke

From: A glimpse into the monetary supply network of the Tang empire in the seventh century CE: archaeometallurgical study of Kaiyuan Tongbao coins from Lafu Queke cemetery, Xinjiang, Northwest China

Lab No

Cu (wt.%)

Sn (wt.%)

Pb (wt.%)

206Pb/204Pb

207Pb/204Pb

208Pb/204Pb

HM1

59.5

14.3

20.5

18.598

15.787

39.190

HM2

48.9

14.1

22.9

18.427

15.817

38.910

HM3

61.2

14.3

20.0

18.304

15.661

38.672

HM4

63.8

14.5

20.3

18.428

15.807

38.903

HM5

71.1

21.2

5.5

18.929

15.779

39.709

HM6

45.4

24.8

17.9

19.238

15.771

40.238

HM7

58.5

24.1

16.0

18.526

15.760

38.975

HM8

44.8

29.6

22.9

19.313

15.779

40.442

HM9

54.7

18.3

26.2

18.440

15.803

38.984

HM10

70.4

14.7

10.3

18.518

15.777

38.976

HM11

62.6

19.5

15.2

19.155

15.784

40.137

HM12

67.2

14.4

10.0

18.911

15.770

39.688

HM13

64.9

15.9

12.3

18.190

15.690

38.631

HM14

66.6

14.1

10.6

19.213

15.778

40.270

HM15

66.2

17.5

15.2

19.101

15.772

40.048