Table 1 Alteration rates in unseeded tests

From: Contribution of zeolite-seeded experiments to the understanding of resumption of glass alteration

Test reference

T (°C)

Δt P (days)

r P (g m−2 d−1)

t RA (days)

r RA (g m−2 d−1) [R 2]

US-1770-11.3

90

Not observed

1–2

3.3 [0.98]

US-1770-11.0

90

9 (6–15)

1.3 × 10−2

15–21

1.9 [0.97]

US-1770-10.7

90

23 (6–29)

8.7 × 10−3

29–40

7.5 × 10−1 [0.76]

US-1770-10.4

90

83 (3–86)

2.5 × 10−3

86–119

5.6 × 10−2 [0.97]

US-1770-10.1

90

>243 (86–end)

≈2 × 10−3

Not observed

US-1770-F

90

>210 (119–end)

3.2 × 10−3

Not observed

US-70-11.3

90

Not observed

0–5

≈8

US-70-11.0

90

≈8 (5–13)

≈7 × 10−1

13–24

≈8

US-70-10.7

90

≈11 (13–24)

≈2 × 10−1

24–40

2.1 [0.98]

us-1770-13.1

30

197 (110–307)

4.6 × 10−3

250–307

9.8 × 10−3 [0.93]

us-1770-12.7

30

>590 (110–end)

6.2 × 10−4

Not observed

us-1770-12.3

30

>590 (110–end)

9.4 × 10−5

Not observed

 
  1. Duration (Δt P) and glass alteration rate (r P) plateauing during the latency period preceding the resumption of alteration. Onset time (interval t RA between the last sample before the resumption and the first one during the resumption) and rate (r RA) of the resumption of alteration for unseeded tests. r RA is determined by linear regression: coefficient of determination R 2 shown in square brackets indicates that this assumption is reasonable; furthermore, the maximum rate calculated by the moving average does not exceed 2.5 × r RA