West Rota Volcano (WRV) is a recently discovered extinct submarine volcano in the southern Mariana Arc. It is large (25 km diameter base), shallow (up to 300 m below sealevel), and contains a large caldera (6 ¥ 10 km, with up to 1 km relief). The WRV lies near the northern termination of a major NNE-trending normal fault. This and a second, parallel fault just west of the volcano separate uplif...

Quartz-rich xenoliths hosted in the basaltic–andesitic and andesitic lavas of Monte dei Porri, in the island of Salina, contain fluid and melt inclusions whose study makes it possible to trace back the magma ascent path of this volcano; moreover, they are a source of information about the anatectic processes that occurred under this island. The texture, mineralogy and whole-rock chemistry of th...

Abstract Glaciovolcanic deposits at Tongariro and Ruapehu volcanoes, New Zealand, represent diverse styles of interaction between wet-based glaciers andesitic lava. There are iceconfined lavas, also hydroclastic breccia subaqueous pyroclastic that formed during effusive explosive eruptions into meltwater beneath the glacier; they rare among globally reported products glaciovolcanism. The appare...

Analyses of elemental abundances by secondary ion mass spectrometry (SIMS) require matrix-matched standard samples to account for the matrix effect on correction factors. This requirement makes it difficult obtain accurate results geological variable chemistry. In this study, we prepared 39 volcanic glasses foiditic, basaltic, basaltic andesitic, rhyolitic and pure SiO2 compositions, including ...