Water-enhanced interdiffusion of major elements between natural shoshonite and high-K rhyolite melts

The interdiffusion of six major elements (Si, Ti, Fe, Mg, Ca, K) between natural shoshonite and a high-K rhyolite (Vulcano island, Aeolian archipelago, Italy) has been experimentally measured by the diffusion couple technique at 1200 °C, pressures from 50 to 500 MPa and water contents from 0.3 (‘nominally dry’) to 2 wt%. The experiments were carried out in an internally heated pressure vessel, and major element profiles were later acquired by...