Magma Storage Conditions of Large Plinian Eruptions of Santorini Volcano (Greece)

Cadoux, Anita; Scaillet, Bruno; Druitt, Timothy H.; Deloule, Étienne

doi:10.1093/petrology/egu021

Cited by 69 publications

(104 citation statements)

References 89 publications

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“…The point that should be stressed is that the amphibole-present differentiation trend shown by Kolumbo is typical of most arc volcanoes worldwide and that Santorini is the exception [Elburg et al, 2014]. The general absence of amphibole in the Santorini suite is likely the result of crystallization under hotter conditions compared to the Akrotiri rhyodacites and, by inference, Kolumbo [Druitt et al, 1999;Cadoux et al, 2014;And ujar et al, 2015].…”

Section: Amphibole and Biotite In The Kolumbo Suitementioning

confidence: 99%

A distinct source and differentiation history for Kolumbo submarine volcano, Santorini volcanic field, Aegean arc

Klaver

Carey

Nomikou

et al. 2016

Geochem Geophys Geosyst

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This study reports the first detailed geochemical characterization of Kolumbo submarine volcano in order to investigate the role of source heterogeneity in controlling geochemical variability within the Santorini volcanic field in the central Aegean arc. Kolumbo, situated 15 km to the northeast of Santorini, last erupted in 1650 AD and is thus closely associated with the Santorini volcanic system in space and time. Samples taken by remotely‐operated vehicle that were analyzed for major element, trace element and Sr‐Nd‐Hf‐Pb isotope composition include the 1650 AD and underlying K2 rhyolitic, enclave‐bearing pumices that are nearly identical in composition (73 wt.% SiO2, 4.2 wt.% K2O). Lava bodies exposed in the crater and enclaves are basalts to andesites (52–60 wt.% SiO2). Biotite and amphibole are common phenocryst phases, in contrast with the typically anhydrous mineral assemblages of Santorini. The strong geochemical signature of amphibole fractionation and the assimilation of lower crustal basement in the petrogenesis of the Kolumbo magmas indicates that Kolumbo and Santorini underwent different crustal differentiation histories and that their crustal magmatic systems are unrelated. Moreover, the Kolumbo samples are derived from a distinct, more enriched mantle source that is characterized by high Nb/Yb (>3) and low 206Pb/204Pb (<18.82) that has not been recognized in the Santorini volcanic products. The strong dissimilarity in both petrogenesis and inferred mantle sources between Kolumbo and Santorini suggests that pronounced source variations can be manifested in arc magmas that are closely associated in space and time within a single volcanic field.

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Section: Amphibole and Biotite In The Kolumbo Suitementioning

confidence: 99%

A distinct source and differentiation history for Kolumbo submarine volcano, Santorini volcanic field, Aegean arc

Klaver

Carey

Nomikou

et al. 2016

Geochem Geophys Geosyst

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“…We show 55 matrix glass-melt inclusions pairs representing different eruptions, samples and different host minerals (plagioclase, alkali feldspar, olivine, amphibole, magnetite, quartz, clino-and orthopyroxene). Data are from Cadoux et al (2014), Gioncada and Landi (2010), Horn and Schmincke (2000), Kutterolf et al (2008a,b), Larsen (2006), Mandeville et al (1996), Naumov et al (2008), Plechov et al (2010), Portnyagin et al (2012), Schattel et al (2014), Straub and Layne (2003b).…”

Section: Tephra As a Materials For Petrological And Geochemical Studiesmentioning

confidence: 99%

Tephra without Borders: Far-Reaching Clues into Past Explosive Eruptions

2015

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This review is intended to highlight recent exciting advances in the study of distal (>100 km from the source) tephra and cryptotephra deposits and their potential application for volcanology. Geochemical correlations of tephra between proximal and distal locations have extended the geographical distribution of tephra over tens of millions square kilometers. Such correlations embark on the potential to reappraise volume and magnitude estimates of known eruptions. Cryptotephra investigations in marine, lake, and ice-core records also give rise to continuous chronicles of large explosive eruptions many of which were hitherto unknown. Tephra preservation within distal ice sheets and varved lake sediments permit precise dating of parent eruptions and provide new insight into the frequency of eruptions. Recent advances in analytical methods permit an examination of magmatic processes and the evolution of the whole volcanic belts at distances of hundreds and thousands of kilometers from source. Distal tephrochronology has much to offer volcanology and has the potential to significantly contribute to our understanding of sizes, recurrence intervals and geochemical make-up of the large explosive eruptions.

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“…The crystallization of orthopyroxene is also important in matching the crystal assemblage. Cadoux et al () conducted phase equilibrium experiments using dacite composition (SiO 2 ~70 wt %), and their phase diagrams showed that magnetite is likely to crystallize in oxidized condition than ilmenite. They also showed that stability field of orthopyroxene shifts to higher temperature and higher H 2 O in melt with more reduce conditions.…”

Section: Discussionmentioning

confidence: 99%

Preeruptive P‐T Conditions and H₂O Concentration of the Aso‐4 Silicic End‐Member Magma Based on High‐Pressure Experiments

et al. 2020

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To constrain the preeruptive physical and chemical conditions (pressure, temperature, H2O content, and fO2) of the most recent and largest eruption (Aso‐4) of Aso volcano, Japan, we compared phase assemblages and chemical compositions of erupted material with those of experimentally determined run charges of the silicic end‐member magma of Aso‐4 (the KJ5665 pumice and MY5774 welded lens from the Aso‐4 pyroclastic flow deposit; SiO2 = 70.5 wt %). Experimental conditions were as follows: starting material = KJ5665 pumice, pressure = 100–700 MPa, temperature range = 810–950 °C, and injected H2O content = 2.9–6.7 wt %. The starting material comprised mainly rhyolitic glass with plagioclase, orthopyroxene, magnetite, and ilmenite phenocrysts. Hornblende phenocrysts are not found on cross sections of the KJ5665 pumice. Core compositions of these phenocrysts are unimodal. Using the magnetite‐ilmenite thermometer, the preeruptive magmatic temperature and fO2 of KJ5665 were estimated to be ~900 °C and Nickel‐Nickel oxide (NNO) +1.1 log units, respectively. Run products contain plagioclase (An20–48), orthopyroxene (Mg# = 53–72), magnetite, ilmenite, biotite, and K‐feldspar. Hornblende was not observed. Preeruptive conditions of the silicic end‐member magma of the Aso‐4 eruption are estimated to be ~900 °C, ≤ 300 MPa, and ≤ 3 wt % H2O.

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Magma Storage Conditions of Large Plinian Eruptions of Santorini Volcano (Greece)

Cited by 69 publications

References 89 publications

A distinct source and differentiation history for Kolumbo submarine volcano, Santorini volcanic field, Aegean arc

A distinct source and differentiation history for Kolumbo submarine volcano, Santorini volcanic field, Aegean arc

Tephra without Borders: Far-Reaching Clues into Past Explosive Eruptions

Preeruptive P‐T Conditions and H₂O Concentration of the Aso‐4 Silicic End‐Member Magma Based on High‐Pressure Experiments

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Magma Storage Conditions of Large Plinian Eruptions of Santorini Volcano (Greece)

Cited by 69 publications

References 89 publications

A distinct source and differentiation history for Kolumbo submarine volcano, Santorini volcanic field, Aegean arc

A distinct source and differentiation history for Kolumbo submarine volcano, Santorini volcanic field, Aegean arc

Tephra without Borders: Far-Reaching Clues into Past Explosive Eruptions

Preeruptive P‐T Conditions and H2O Concentration of the Aso‐4 Silicic End‐Member Magma Based on High‐Pressure Experiments

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Preeruptive P‐T Conditions and H₂O Concentration of the Aso‐4 Silicic End‐Member Magma Based on High‐Pressure Experiments