Table 2.
Slope values of mass exponent τ(q) for thorium–uranium and thorium–potassium distributions before, within and the OAE3 intervals at Songliao Basin (SK1S), Deep Ivorian Basin (959D) and Demerara Rise (1261B).
| Sites | Th/U | Th/K | ||||
|---|---|---|---|---|---|---|
| SK1S | 959D | 1261B | SK1S | 959D | 1261B | |
| After OAE3 | ||||||
| q ∈ [ − 5 ; 0 [ | 1.62 | 1.82 | 2.11 | 2.63 | 1.53 | 2.04 |
| q ∈ ] 0 ; 5 ] | 0.91 | 1.32 | 0.47 | 1.16 | 1.39 | 1.18 |
| OAE3 | ||||||
| q ∈ [ − 5 ; 0 [ | 2.46 | 2.41 | 2.19 | 2.4 | 2.49 | 2.3 |
| q ∈ ] 0 ; 5 ] | 0.86 | 0.82 | 1.1 | 1.02 | 0.84 | 1.17 |
| Before OAE3 | ||||||
| q ∈ [ − 5 ; 0 [ | 1.47 | – | 2.1 | 1.83 | – | 2.02 |
| q ∈ ] 0 ; 5 ] | 0.4 | – | 1.02 | 1.04 | – | 1.34 |