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Table 4 Summary of fissure monazite growth domains weighted mean ages and spot age ranges

From: Ion microprobe dating of fissure monazite in the Western Alps: insights from the Argentera Massif and the Piemontais and Briançonnais Zones

Sample domain

Figure

Zoning of the grains

Weighted mean domain 208Pb/232Th ages (Ma, ± 1σ)

MSWD

Number of analyses

Spot 208Pb/232Th age range of entire grain (Ma, ± 1σ)

VIU1—B

3a

Regular

29.9 ± 0.5

3.7

14

33.2 ± 0.5—28.5 ± 0.5

BALZI2—A

3b

Patchy border

36.0 ± 0.6

0.79

5

50.1 ± 0.6—11.2 ± 0.6

BALZI2—B

30.3 ± 0.5

2.80

10

BALZI2—C

25.4 ± 0.5

0.69

7

MORI1—A

3c

Regular

15.2 ± 0.3

2.3

13

15.9 ± 0.4—14.2 ± 0.3

MORI1—B

15.1 ± 0.4

2.6

9

VINA1—A

3d

Regular

16.4 ± 0.2

0.97

7

16.7 ± 0.3—13.0 ± 0.2

VINA1—B

15.2 ± 0.6

3.3

5

VINA1—C1

15.4 ± 0.5

3.0

6

VINA1—C2

14.4 ± 0.5

2.4

5

GESS1—B

3e

Patchy border

14.9 ± 0.3

2.2

14

16.2 ± 0.4—12.1 ± 0.3