Table 3 Results of lead isotope analysis of the Ming Dynasty coin samples

From: An archaeometallurgical study of Ming Dynasty (1368–1644 AD) coins from the North Reef, South China Sea

No.

Sample number

Sample name

206pb/

204pb

±2σm

207pb/

204pb

±2σm

208pb/

204pb

±2σm

1

ZY-NH-50

Yongle Tongbao

18.3434

0.0008

15.6923

0.0007

38.8506

0.0018

2

ZY-NH-51

Yongle Tongbao

18.3498

0.0006

15.6915

0.0006

38.8345

0.0015

3

ZY-NH-57

Yongle Tongbao

18.2992

0.0007

15.6935

0.0006

38.8433

0.0017

4

ZY-NH-47

Hongwu Tongbao

18.5067

0.0007

15.7315

0.0006

38.8506

0.0016

5

ZY-NH-55

Hongwu Tongbao

18.3525

0.0009

15.6939

0.0007

38.8508

0.0019

6

ZY-NH-49

Hongwu Tongbao

18.2449

0.0005

15.6728

0.0005

38.7137

0.0016

7

ZY-NH-58

Yongle Tongbao

18.2353

0.0008

15.6612

0.0007

38.6747

0.0018

8

ZY-NH-62

Hongwu Tongbao

18.6009

0.0007

15.7585

0.0005

39.0812

0.0014

9

ZY-NH-63

Yongle Tongbao

18.6487

0.0007

15.7705

0.0007

39.1275

0.0015

10

ZY-NH-64

Yongle Tongbao

18.6406

0.0010

15.7666

0.0009

39.1134

0.0023

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