Eruptive dynamics reflect crustal structure and mantle productivity beneath volcanoes

Volcanoes exhibit a wide range of eruptive and geochemical behavior, which has significant implications for their associated risk. The suggested first-order drivers intervolcanic diversity invoke combination crustal mantle processes. To better constrain mantle-crustal-volcanic coupling, we used the well-studied Lesser Antilles island arc. Here, show that melt flux from mantle, identified by proxy in form boron isotopes inclusions, correlates with long-term volcanic productivity, edifice height, geophysically defined along-arc structure. These features are consequence variable modulating pressure-temperature-composition structure crust, inverted xenolith mineral chemistry. Mafic to intermediate melts reside at relatively constant temperature (981 ± 52 °C; 2σ) middle crust (3.5−7.1 kbar), whereas chemically evolved (rhyolitic) stored predominantly upper (<3.5 kbar) maximum depths vary along arc (6−15 km). Our findings applicable worldwide, where see similar correlations among average magma geochemistry, magnitude, rate input.