The pre-eruptive magma plumbing system of the 2007–2008 dome-forming eruption of Kelut volcano, East Java, Indonesia

Jeffery, Adam J.; Gertisser, Ralf; Troll, Valentin R.; Jolis, Ester M.; Dahrén, Börje; Harris, Chris; Tindle, A. G.; Preece, Katie; O’Driscoll, B R; Humaida, Hanik; Chadwick, Jane P.

doi:10.1007/s00410-013-0875-4

Cited by 82 publications

(87 citation statements)

References 138 publications

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“…3). The cooled state of the magma without recent magma recharge is consistent with the limited amount of precursory unrest recorded prior to the explosive 2014 eruption of Kelud (<2 weeks), which strongly contrasts with the higher estimated magma temperatures (1160 °C) and deep seismicity and high CO 2 emissions that were recorded up to four months prior to the 2007 effusive eruption (Caudron et al, 2012;Jeffery et al, 2013). In contrast, a magma recharge event likely preceded the 2007 eruption and lowered magma H 2 O contents via volatile dilution, and likewise magma viscosity via an increase in temperature (Fig.…”

Section: What Controls the Variation In Magma H 2 O Contents?supporting

confidence: 70%

Volatile dilution during magma injections and implications for volcano explosivity

Cassidy

Castro

Helo

et al. 2016

Geology

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Section: What Controls the Variation In Magma H 2 O Contents?supporting

confidence: 70%

Volatile dilution during magma injections and implications for volcano explosivity

Cassidy

Castro

Helo

et al. 2016

Geology

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“…Assuming near-equilibrium crystallization within 10% of the one-to-one line (cf. Jeffery et al, 2013), most of the crystal compositions from lava fountains equilibrated with the host magma (Fig. 5a).…”

Section: The Thermal Path Of Eruptionsmentioning

confidence: 92%

Clinopyroxene and titanomagnetite cation redistributions at Mt. Etna volcano (Sicily, Italy): Footprints of the final solidification history of lava fountains and lava flows

et al. 2015

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“…This model is highly versatile with a standard error of estimate (SEE) of ±33 °C and ±170 MPa and has been applied successfully to numerous studies (Armienti et al 2007(Armienti et al , 2013Mollo et al 2011Mollo et al , 2015aJeffery et al 2013). The phenocrysts and whole-rock compositions used for calculation are reported in the Supplementary Table S5.…”

Section: P-t Pathsmentioning

confidence: 99%

Mt. Etna plumbing system revealed by combined textural, compositional, and thermobarometric studies in clinopyroxenes

Giacomoni

Coltorti

Bryce

et al. 2016

Contrib Mineral Petrol

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International audienceCoupled textural and in situ geochemical studies of clinopyroxene (cpx) phenocrysts, from both historical and recent eruptions of Mt. Etna volcano, provide a means to investigate the processes occurring in the deepest portion of the feeding system (>10 km depth). Five distinct textures were recognized: (1) normal oscillatory zoning, (2) normal zoning with Fe-rich rim, (3) sieve-textured core, (4) reverse oscillatory zoning, and (5) dusty rim. Electron microprobe analyses indicate an almost constant diopside–augite composition, with a slight enrichment in the enstatite for more recent erupted cpx. Core-to-rim compositional profiles, performed along the cpx, reveal distinct compositional characteristics. Normal oscillatory zoning is often characterized by a sharp increase in FeO (Δ ~ 2 wt%) accompanied by a drop in Al2O3 on the outermost 30 μm. Reverse oscillatory zoning, by contrast, exhibits a drop in FeO, Al2O3 (Δ ~ 2 wt%), and a remarkable crystal rim increase in MgO (up to 5 wt%). Similar compositional changes are evident in dusty-textured rims, which are characterized by dissolution edges and overgrowth containing glass pockets and channels. No significant compositional variations have been observed across crystals with sieve-textured cores. Trace element concentrations show enrichments in Sr, La, Zr, and REE, together with a decreasing La/Yb ratio (from ~7 to ~4) in rims of normally zoned crystals. Cpx with reverse zoning and dusty rims has low Sr, La, Zr, and REE contents toward crystal rims. Thermometers and barometers, based on equilibrium cpx-melt pairs, suggest that cpx cores start nucleating at 720 MPa, with the majority of them forming between 600 and 400 MPa but continuing to crystallize until very shallow depths (<100 MPa). Normal oscillatory-zoned phenocrysts surrounded by rims form at pressures shallower than 400 MPa, while reverse zoning and dusty rims occur between 400 and 500 MPa. Coupled petrologic and thermobarometric studies on both clinopyroxenes and plagioclases, associated with detailed textural and in situ geochemical analyses, are promising tools to reconstruct the entire magma ascent path beneath open-system volcanoes. At Mt. Etna, two distinct processes could account for the observed textures: Fe-rich rims in normal oscillatory-zoned crystals can be related to decompression-induced crystallization, while reverse zoning and dusty rims can be produced by mixing with a more basic magma at 400–500 MPa (i.e., ~10 km). Textural features are not restricted to a particular evolutionary phase of the volcano, which suggest that the deep feeding system has not changed significantly since the first alkaline volcanic phase

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The pre-eruptive magma plumbing system of the 2007–2008 dome-forming eruption of Kelut volcano, East Java, Indonesia

Cited by 82 publications

References 138 publications

Volatile dilution during magma injections and implications for volcano explosivity

Volatile dilution during magma injections and implications for volcano explosivity

Clinopyroxene and titanomagnetite cation redistributions at Mt. Etna volcano (Sicily, Italy): Footprints of the final solidification history of lava fountains and lava flows

Mt. Etna plumbing system revealed by combined textural, compositional, and thermobarometric studies in clinopyroxenes

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