Table 1 Characteristics (sample type, gas contents and ratios, He-Sr isotopes) of the main end-members selected from the Table S1 and discussed in this study. Ages and inferred crystallization depths10. In bold, minimum and maximum values for each parameter. ‘TGC’ for Total Gas Content.
Samples information | Gas contents and ratios | Isotopes ratios | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
Location | Type | Material | Eruption/Site | Emission date | Name | TGC (mol/g) | 4He (mol/g) | 4He/40Ar* | He/CO2 | Inferred crystallisation depth | Rc/Ra | 87Sr/86Sr |
Central | Lavas | Crystals | February 2005 | February 2, 2005 | REU0502-221 | 9.6E-10 | 9.8E-13 | 4.9 | 1.0E-03 | Oceanic crust | 12.5 | 0.704181 |
Central | Lavas | Crystals | August 2015 | October 26, 2015 | REU151026-1 | 1.1E-09 | 3.2E-13 | 3.5 | 3.9E-04 | 14.3 | 0.704165 | |
Peripheral | Lavas | Crystals | Piton de Caille | <5 kyrs | PDC-1 | 1.0E-07 | 7.1E-12 | 1.3 | 7.0E-05 | Upper mantle: underplating layer | 13.8 | 0.704104 |
Peripheral | Lavas | Crystals | Trous Blancs | <10 krys | TB | 2.9E-08 | 4.9E-12 | 2.0 | 1.7E-04 | 13.4 | 0.704261 | |
Peripheral | Cumulates | Crystals | Chisny | ≈ 381 BP | ILR84-4 | 7.8E-07 | 2.9E-11 | 1.4 | 3.7E-05 | Upper mantle: deep melt horizon | 12.8 | |
Peripheral | Spring waters | Free gas | Cilaos (Irénée) | April 12, 2017 | IRE170412-1 | 1.4 | 1.2E-05 | Upper mantle | 13.6 | |||
Peripheral | Spring waters | Free gas | Cilaos (Véronique) | April 12, 2017 | VER170412-1 | 1.8 | 5.7E-5 | 14.0 | ||||
Peripheral | Spring waters | Free gas | Cilaos (Manès) | April 12, 2017 | MAN170412-2 | 2.2 | 3.3E-5 | 13.9 | ||||
