NanoSIMS results from olivine-hosted melt embayments: Magma ascent rate during explosive basaltic eruptions
نویسندگان
چکیده
منابع مشابه
Magma decompression rates during explosive eruptions of Kīlauea volcano, Hawaii, recorded by melt embayments
The decompression rate of magma as it ascends during volcanic eruptions is an important but poorly constrained parameter that controls many of the processes that influence eruptive behavior. In this study, we quantify decompression rates for basaltic magmas using volatile diffusion in olivine-hosted melt tubes (embayments) for three contrasting eruptions of Kīlauea volcano, Hawaii. Incomplete e...
متن کاملMagma degassing and basaltic eruption styles: a case study of V2000 year BP Xitle volcano in central Mexico
To investigate the relationship between volatile abundances and eruption style, we have analyzed major element and volatile (H2O, CO2, S) concentrations in olivine-hosted melt inclusions in tephra from the V2000 yr BP eruption of Xitle volcano in the central Trans-Mexican Volcanic Belt. The Xitle eruption was dominantly effusive, with fluid lava flows accounting for V95% of the total dense rock...
متن کاملBasaltic explosive volcanism: Constraints from deposits and models
Basaltic pyroclastic volcanism takes place over a range of scales and styles, from weak discrete Strombolian explosions (!10–10 kg s) to Plinian eruptions of moderate intensity (10–10 kg s). Recent well-documented historical eruptions from Etna, Kı̄lauea and Stromboli typify this diversity. Etna is Europe’s largest and most voluminously productive volcano with an extraordinary level and diversit...
متن کاملDynamics of magma ascent in the volcanic conduit
This chapter presents the various mechanisms and processes that come into play within the volcanic conduit for a broad range of effusive and dry explosive volcanic eruptions. Decompression during magma ascent causes volatiles to exsolve and form bubbles containing a supercritical fluid phase. Viscous magmas, such as rhyolite or crystal-rich magmas, do not allow bubbles to ascend buoyantly and m...
متن کاملRole of syn-eruptive plagioclase disequilibrium crystallization in basaltic magma ascent dynamics
Timescales of magma ascent in conduit models are typically assumed to be much longer than crystallization and gas exsolution for basaltic eruptions. However, it is now recognized that basaltic magmas may rise fast enough for disequilibrium processes to play a key role on the ascent dynamics. The quantification of the characteristic times for crystallization and exsolution processes are fundamen...
متن کامل