Viscosity of crystal-free silicate melts from the active submarine volcanic chain of Mayotte

Verdurme, Pauline; Losq, Charles Le; Chevrel, Oryaëlle; Pannefieu, Salomé; Médard, Étienne; Berthod, Carole; Komorowski, Jean-Christophe; Bachèlery, Patrick; Gurioli, Lucia

doi:10.1016/j.chemgeo.2023.121326

Cited by 5 publications

(1 citation statement)

References 103 publications

(145 reference statements)

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“…2 − 10 4 Pa.s at 900°C for a phonolite,Whittington et al, 2001;Giordano et al, 2008;Verdurme et al, 2023).Ascent of high-silica magma most likely will cause deformational stress leading to super cial fracturing, as demonstrated by numerous observations (e.g Castro et al, 2005;Gonnermann and Manga, 2005;Rust and Cashman, 2004;Tuffen et al, 2003)…”

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Late Quaternary explosive phonolitic volcanism of Petite-Terre (Mayotte, Western Indian Ocean)

Lacombe,

Gurioli,

Di Muro

et al. 2024

Bull Volcanol

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We describe four Quaternary volcanic phonolitic explosive edi ces containing mantle xenoliths on Petite-Terre Island (Mayotte, Comoros Archipelago, Western Indian Ocean) to quantifying magma fragmentation processes and eruptive dynamics. Petite-Terre explosive volcanism is the westernmost subaerial expression of a 60 km volcanic chain, whose eastern submarine tip has been the site of the 2018-2021 sub-marine eruption which saw the birth of a new volcano, Fani Maoré. The scattered recent volcanic activity and the persistence of deep seismic activity along the volcanic chain requires to constrain the origin of past activity as a proxy of possible future volcanic activity on land. Through geomorphology, stratigraphy, grain size and componentry data we show that Petite-Terre tuff rings and tuff cones are likely formed by several closely spaced eruptions forming a monogenetic volcanic complex. The eruptive sequences are composed of few, relatively thin (cm-dm) coarse and lithic rich pumice fallout layers containing abundant ballistic clasts, and ne-ash rich deposits mostly emplaced by dilute pyroclastic density current (PDCs). All deposits are dominated by vesiculated, juvenile (pumice clasts, dense clasts, and obsidian) and non-juvenile clasts from older ma c scoria cones, coral reef and the volcanic shield of Mayotte as well as mantle xenoliths. We conclude that phonolitic magma ascended directly and rapidly from the mantle and rst experienced a purely magmatic fragmentation at depth (≈ 1 km deep). The fragmented pyroclasts underwent a second shallower hydromagmatic, fragmentation where they interacted with liquid water, producing ne ash and building the tuff ring and tuff cone morphologies.

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confidence: 98%

Late Quaternary explosive phonolitic volcanism of Petite-Terre (Mayotte, Western Indian Ocean)

Lacombe,

Gurioli,

Di Muro

et al. 2024

Bull Volcanol

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Detectability of Seamount Eruptions Through a Quantum Technology Gravity Mission MOCAST+: Hunga Tonga, Fani Maoré and Other Smaller Eruptions

Braitenberg,

Pastorutti

2024

Surv Geophys

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Seamount eruptions alter the bathymetry and can occur undetected due to lack of explosive character. We review documented eruptions to define whether they could be detected by a future satellite gravity mission. We adopt the noise level in acquisitions of multi-satellite constellations as in the MOCAST+ study, with a proposed payload of a quantum technology gradiometer and clock. The review of underwater volcanoes includes the Hunga Tonga Hunga Ha’apai (HTHH) islands for which the exposed surface changed during volcanic unrests of 2014/2015 and 2021/2022. The Fani Maoré submarine volcanic eruption of 2018–2021 produced a new seamount 800 m high, emerging from a depth of 3500 m, and therefore not seen above sea surface. We review further documented submarine eruptions and estimate the upper limit of the expected gravity changes. We find that a MOCAST+ type mission should allow us to detect the subsurface mass changes generated by deep ocean submarine volcanic activity for volume changes of 6.5 km3 upwards, with latency of 1 year. This change is met by the HTHH and Fani Maoré volcanoes.

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The effect of carbonate assimilation and nanoheterogeneities on the viscosity of phonotephritic melt from Vesuvius

Giuliani,

Di Genova,

Di Fiore

et al. 2024

Chemical Geology

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Viscosity of crystal-free silicate melts from the active submarine volcanic chain of Mayotte

Cited by 5 publications

References 103 publications

Late Quaternary explosive phonolitic volcanism of Petite-Terre (Mayotte, Western Indian Ocean)

Late Quaternary explosive phonolitic volcanism of Petite-Terre (Mayotte, Western Indian Ocean)

Detectability of Seamount Eruptions Through a Quantum Technology Gravity Mission MOCAST+: Hunga Tonga, Fani Maoré and Other Smaller Eruptions

The effect of carbonate assimilation and nanoheterogeneities on the viscosity of phonotephritic melt from Vesuvius

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