Titre :

Metastable liquid immiscibility in the 2018–2021 Fani Maoré lavas as a mechanism for volcanic nanolite formation

Auteur(s) :

Thivet, Simon [Auteur]
Ludwig Maximilian University [Munich] = Ludwig Maximilians Universität München [LMU]
Pereira, Luiz [Auteur]
Ludwig Maximilian University [Munich] = Ludwig Maximilians Universität München [LMU]
Menguy, Nicolas [Auteur]
Muséum national d'Histoire naturelle [MNHN]
Médard, Etienne [Auteur]
Laboratoire Magmas et Volcans [LMV]
Verdurme, Pauline [Auteur]
Laboratoire Magmas et Volcans [LMV]
Berthod, Carole [Auteur]
Institut de Physique du Globe de Paris [IPG Paris]
Troadec, David [Auteur]
Institut d’Électronique, de Microélectronique et de Nanotechnologie - UMR 8520 [IEMN]
Centrale de Micro Nano Fabrication - IEMN [CMNF - IEMN]
Hess, Kai-Uwe [Auteur]
Ludwig Maximilian University [Munich] = Ludwig Maximilians Universität München [LMU]
Dingwell, Donald [Auteur]
Ludwig Maximilian University [Munich] = Ludwig Maximilians Universität München [LMU]
Komorowski, Jean-Christophe [Auteur]
Institut de Physique du Globe de Paris [IPG Paris]

Titre de la revue :

Communications Earth & Environment

Pagination :

483

Éditeur :

Springer Nature

Date de publication :

2023-12-16

ISSN :

2662-4435

Mot(s)-clé(s) en anglais :

Mineralogy
Natural hazards
Petrology
Volcanology

Discipline(s) HAL :

Planète et Univers [physics]

Résumé en anglais : [en]

Nanoscale liquid immiscibility is observed in the 2018-2021 Fani Maoré submarine lavas (Comoros archipelago). Heat transfer calculations, Raman spectroscopy, scanning and transmission electron microscopy reveal that in ...
Lire la suite >Nanoscale liquid immiscibility is observed in the 2018-2021 Fani Maoré submarine lavas (Comoros archipelago). Heat transfer calculations, Raman spectroscopy, scanning and transmission electron microscopy reveal that in contrast to thin (500 µm) outer rims of homogeneous glassy lava (rapidly quenched upon eruption, >1000 °C s-1), widespread liquid immiscibility is observed in thick (1 cm) inner lava rims (moderately quenched, 1-1000 °C s-1), which exhibit a nanoscale coexistence of Si-and Al-rich vs. CaFe Fe-, and Ti-rich melt phases. In this zone, rapid nanolite crystallization contrasts with the classical crystallization process inferred for the slower cooled (< 1 °C s-1) lava interiors. The occurrence of such metastable liquid immiscibility at eruptive conditions controls physicochemical characteristics of nanolites and residual melt compositions. This mechanism represents a common yet frequently unobserved feature in volcanic products, with the potential for major impacts on syn-eruptive magma degassing and rheology, and thus on eruptive dynamics.Lire moins >

Langue :

Anglais

Vulgarisation :

Non

Projet ANR :

Université de Paris

Collections :

• Institut d'Électronique, de Microélectronique et de Nanotechnologie (IEMN) - UMR 8520

Source :

Harvested from HAL