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Swiss Journal of Geosciences

Table 4 Apatite fission track data

From: Dating emplacement and evolution of the orogenic magmatism in the internal Western Alps: 2. The Biella Volcanic Suite

Sample

Altitude

Counted grains

Ns

ρ s (105 cm−2)

N i

ρ i (105 cm−2)

χ 2

Age ± 1σ (Ma)

Dpar (μm)

Track length ± 1σ (μm)

Tracks measured

Bi0704

680

17

159

4.625

1,837

53.438

99.81

20.3 ± 2.8

2.55

12.7 ± 2.0

39

Bi0706

1,320

16

181

4.778

2,854

75.340

13.36

15.5 ± 2.3

2.24

11.8 ± 1.9

24

  1. N s number of spontaneous tracks counted on the sample, ρ s density of spontaneous tracks, N i number of induced tracks counted on the glimmer detector, ρ i density of induced tracks, χ 2 result of the statistical test in %, Dpar measured long axis of etch pits on the polished surface in μm, Mean track length mean length of horizontal confined tracks in μm given with 1σ error
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