Experimental constraints on degassing of magma: isothermal bubble growth during continuous decompression from high pressure

NanoSIMS results from olivine-hosted melt embayments: Magma ascent rate during explosive basaltic eruptions

“…MPa/s (Gardner et al, 1999), Humphreys et al suggested that the reported decompression rates were potentially overestimated as a result of assuming equilibrium degassing. The fast decompression rates estimated for the Fuego embayments introduce the possibility of disequilibrium degassing for the Fuego magmatic system as well.…”

Rapid ascent of rhyolitic magma at Chaitén volcano, Chile

“…A critical unknown that has limited the accuracy of eruption forecasting is the rate of magma rise before an explosive eruption: this parameter controls not only degassing behaviour and flow rheology 10,11 , but also the timescale of accompanying precursory unrest and pre-eruptive warning 12 . A vast majority of andesite and dacite volcanic eruptions were preceded by weeks to months of precursory unrest, consistent with long magma ascent times and correspondingly sluggish (some centimetres per second) rise velocities 13 .…”

In situstudy of magmatic processes: a new experimental approach

“…11,12], several experimental studies have been performed [ex. [13][14][15][16]. Usually the ascent of magma is experimentally simulated in autoclaves by decompression experiments at a constant temperature, the samples studied after quench.…”