(a) Sketch of the centrifuge used to trigger the injection of the basaltic melt in the phonolite at 1,200 °C. The location and geometry of the experimental sample before the starting of the experiments are also shown. (b–d) Resultant glasses from magma mixing experiments at different mixing time t = 5 min (b), t = 20 min (c) and t = 120 min (d) The vertical white arrow in (b) indicates the direction of motion of the basaltic melt during injection. White lines correspond to the transects along which geochemical analyses have been performed and are located at approximately the division line of the two melts at t = 0. The horizontal white arrows in (b–d) indicate the direction in which the analyses were performed.