Tableau 1
Concentrations en Rb, Sr, et compositions isotopiques en Sr des différents pisolites. Pour les données de lessivage, 15’ et 1 h donnent le temps de lessivage, et les lettres L et R distinguent la fraction lessivée du résidu. Les incertitudes sont données en 2σ.
Rb and Sr concentrations, and Sr isotopic compositions measured on different pisoids. Considering leaching experiments, 15’ and 1 h are leaching times, and letters L and R refer to the leachate and the residue, respectively. Uncertainties are reported as 2σ.
| Échantillon | Rb (pg/g) | Sr (pg/g) | 87Rb/86Sr | 87Sr/86Sr | Erreur |
|---|---|---|---|---|---|
| P1 – millimétriques | |||||
| P1-1 | 11,47 | 15,81 | 2,05 | 0,715906 | 0,000017 |
| P1-2 | 10,90 | 10,90 | 2,82 | 0,715520 | 0,000014 |
| P1-3 | 11,31 | 12,29 | 2,60 | 0,715236 | 0,000009 |
| P1-4 | 5,77 | 10,11 | 1,61 | 0,713650 | 0,000015 |
| P1-5 | 16,53 | 16,23 | 2,88 | 0,716180 | 0,000011 |
| P1-6 | 13,27 | 13,13 | 2,85 | 0,715747 | 0,000009 |
| Lessivage | |||||
| P1 | 10,75 | 11,67 | 2,60 | 0,715048 | 0,000010 |
| P1-15’L | 16,12 | 11,97 | 3,80 | 0,717274 | 0,000011 |
| P1-15’R | 14,75 | 16,87 | 2,47 | 0,715276 | 0,000009 |
| P1-1hL | 11,82 | 10,02 | 3,33 | 0,717372 | 0,000025 |
| P1-1hR | 15,08 | 17,14 | 2,49 | 0,715299 | 0,000009 |
| P2 – centimétriques | |||||
| P2-1 | 2,93 | 8,11 | 1,02 | 0,712970 | 0,000010 |
| P2-2 | 4,33 | 9,32 | 1,31 | 0,712935 | 0,000010 |
| P2-3 | 5,38 | 10,85 | 1,40 | 0,713168 | 0,000010 |
| P2-4 | 21,57 | 8,58 | 7,10 | 0,724992 | 0,000010 |
| P2-5 | 8,18 | 13,75 | 1,68 | 0,713292 | 0,000010 |
| P2-6 | 4,92 | 10,97 | 1,27 | 0,712534 | 0,000011 |
| Lessivage | |||||
| P2 | 7,07 | 9,13 | 2,19 | 0,713090 | 0,000009 |
| P2-15’L | 15,93 | 14,19 | 3,17 | 0,716826 | 0,000014 |
| P2-15’R | 10,83 | 14,27 | 2,14 | 0,713513 | 0,000010 |
| P2-1hL | 7,38 | 6,93 | 3,01 | 0,716329 | 0,000012 |
| P2-1hR | 9,36 | 12,15 | 2,18 | 0,713552 | 0,000009 |
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