Magmatic Signature in Submarine Hydrothermal Fluids Vented Offshore Ventotene and Zannone Islands (Pontine Archipelago, Central Italy)

Figure 7

⁸⁷Sr/⁸⁶Sr versus R/Ra_c for solid and gas samples from the Tyrrhenian area (modified after Martorelli et al. [27]). The lines are binary mixing between MORB-type mantle and SCEM-type mantle (Subcontinental European Mantle; Dunai and Baur [70]) with a crustal end-member. Numbers (2, 5, 10, and 20) indicate the value () for each curve. Assumed values for mantle and crust end-members: [77]; [78]; [70]; [79]; and [80]. STP/g [81]; STP/g [78]; [82]; and [83]. Data after D'Antonio et al. [71], Barberi et al. [72], Martelli et al. [68], and Italiano et al. [15].