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Article
An empirical relation between velocity, mass discharge rate and vent area for normal through paroxysmal eruptions at Stromboli
Based on published and new data for explosive events at Stromboli (Italy), we propose an empirical relation that links mass discharge rate (MDR) and at-vent gas jet velocity (Gv). We use 65 simultaneous measureme...
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Article
Open AccessLithium and boron diffusivity and isotopic fractionation in hydrated rhyolitic melts
Lithium and boron are trace components of magmas, released during exsolution of a gas phase during volcanic activity. In this study, we determine the diffusivity and isotopic fractionation of Li and B in hydro...
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Article
Open AccessTracking slab surface temperatures with electrical conductivity of glaucophane
Slab surface temperature is one of the key parameters that incur first-order changes in subduction dynamics. However, the current thermal models are based on empirical thermal parameters and do not accurately ...
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Article
How to turn off a lava lake? A petrological investigation of the 2018 intra-caldera and submarine eruptions of Ambrym volcano
In December 2018, an unusually large intra- and extra-caldera eruption took place at Ambrym volcano (Vanuatu). The eruption drained the volcano’s five active lava lakes and terminated, at least momentarily, th...
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Article
Persistent gas emission originating from a deep basaltic magma reservoir of an active volcano: the case of Aso volcano, Japan
Volcanic gas emission is considered to reflect the degassing of magma beneath volcanoes. The combined observations of gas measurement and petrological study are expected to constrain the volatile concentration...
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Article
Fast ascent rate during the 2017–2018 Plinian eruption of Ambae (Aoba) volcano: a petrological investigation
In September 2017, after more than a hundred years of quiescence, Ambae (Aoba), Vanuatu’s largest volcano, entered a new phase of eruptive activity, triggering the evacuation of the island’s 11,000 inhabitants...
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Article
Constraining magma sources using primitive olivine-hosted melt inclusions from Puñalica and Sangay volcanoes (Ecuador)
Constraining arc magma sources at continental arc settings is a delicate task, because chemical signatures from crustal processes obscure the slab and mantle signatures. Here, we present major, trace, and vola...
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Reference Work Entry In depth
Fluorine
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Chapter
Halogens in Terrestrial and Cosmic Geochemical Systems: Abundances, Geochemical Behaviors, and Analytical Methods
The aims of this review chapter are to (i) summarize the distribution of halogens in different fluid (surficial, formation and crystalline shield waters, metamorphic, magmatic-hydrothermal-geothermal) and soli...
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Living Reference Work Entry In depth
Fluorine
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Article
Open AccessContrasting partition behavior of F and Cl during hydrous mantle melting: implications for Cl/F signature in arc magmas
We present the results of five experiments on F and Cl partitioning during hydrous mantle melting under conditions relevant to subduction zone magmatism (1.2–2.5 GPa, 1,180°C–1,430°C). For each experiment, we ...
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Article
Open AccessVolatile (F and Cl) concentrations in Iwate olivine-hosted melt inclusions indicating low-temperature subduction
Investigation of olivine-hosted melt inclusions provides information about the abundance of volatile elements that are often lost during subaerial eruptions of lavas. We have measured the abundances of H2O, CO2, ...
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Article
Open AccessFTIR and Raman spectroscopy characterization of fluorine-bearing titanian clinohumite in antigorite serpentinite and chlorite harzburgite
Titanian clinohumite is an accessory phase found in peridotites, and it can be a key repository of volatile and other trace elements in sub-arc mantle. To characterize spectroscopic variations due to volatile ...
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Article
Hydration of mantle olivine under variable water and oxygen fugacity conditions
The incorporation of H into olivine is influenced by a significant number of thermodynamic variables (pressure, temperature, oxygen fugacity, etc.). Given the strong influence that H has on the solidus tempera...
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Article
Anomalous sulphur isotopes in plume lavas reveal deep mantle storage of Archaean crust
Mass-independent fractionation of sulphur isotopes in basalts from the oceanic island of Mangaia (Cook Islands) indicates ancient subducted Archaean (>2.45 Gyr) oceanic crust and lithosphere survives in the ma...
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Article
Experimental determination of F and Cl partitioning between lherzolite and basaltic melt
We experimentally determined F and Cl partition coefficients together with that of 19 trace elements (including REE, U-Th, HFSE and LILE) between basaltic melt and lherzolite minerals: olivine, orthopyroxene, ...
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Article
Simulating bubble number density of rhyolitic pumices from Plinian eruptions: constraints from fast decompression experiments
Decompression experiments of a crystal-free rhyolitic liquid with ≈ 6.6 wt. % H2O were carried out at a pressure range from 250 MPa to 30–75 MPa in order to characterize effects of magma ascent rate and temperatu...
