3-3-3-3-3-3-3-3-3-3-3-3-3 From: Oryaëlle Chevrel <oryaelle.chevrel@xxxxxxxxx> Dear colleague, We have been founded for a PhD Project about *submarine volcanism* (texture, petrology and rheology of lava and lava flow dynamics under water - see subject below) and therefore *look for PhD candidates* to start on Oct 1, 2021 at the *Laboratoire Magmas et Volcans from the Université Clermont Auvergne, France.* *Deadline for Application : May 20, 2021* Please share this announcement to your students and colleagues. Best regards, Oryaëlle ---- *Description of the PhD project: * *From magma ascent to deep-seated-ocean lava flow emplacement: the case study of the ongoing (since 2018) submarine eruption offshore Mayotte* Following the seismic crisis that has been impacting Mayotte Island (Western Indian Ocean) since May 2018, a lithosphere-scale magmatic event gave birth to a 820-m high submarine volcano 50 km from the island, and produced about 6.4 km3 of magma on the ocean floor at 3,300 m depth. Studying volcanism in a deep submarine environment is a real challenge. However, since May 2019, several scientific cruises, led by the French scientific community, have collected a large number of samples (obtained by sea floor dredges) and time-series of bathymetric data through the 2018-2021 period. Samples from the flank of the active volcano, and from distal ponded lava, lava domes and currently active distal fractures, give us a unique dataset to track the spatial and temporal variations in lava effusive rate, facies and syn-eruptive degassing. The goal of the PhD project is to provide a complete picture of the volcanic system, integrating pre-eruptive conditions of the deep-seated mantle reservoir, magma ascent and degassing/cooling- induced vesiculation and crystallization along the conduit, and magma emplacement on the ocean floor. The student will first perform a detailed quantitative textural analysis of the samples to quantify (i) degassing variations in time and space, (ii) magma ascent time and velocity, and (iii) physical properties/parameters of the erupted material that control the ascent dynamics and submarine emplacement. These textural analyses will be integrated with experimental petrology and volcanology measurements to (i) constrain the degassing evolution of the magma towards the surface, (ii) determine the link between decompression rate and vesicle and crystal number densities in mafic magmas, (iii) establish the temperature dependence of viscosity for these compositions (basanite to phonolite), and (iv) quantify the effect of crystal and bubble growth on viscosity during ascent and submarine lava emplacement. Finally, bathymetry of the growing volcano and lava flow morphology will be examined to (i) correlate sample texture to lava flow morphology, (ii) relate lava flow morphology diversity to effusion rate variation, and iii) constrain submarine lava flow emplacement dynamics (duration, advance rates, effusion rates). We seek a highly motivated student with a good background in geology and in volcanology including skills for rock analyses (textural analyses, petrography, petrology). More importantly, the student must have a team spirit as he/she will work with several scientists in the lab as well as on board scientific cruises. Indeed, the student is expected to take part in one or two scientific cruises around Mayotte. *Supervisors : Oryaëlle Chevrel, Lucia Gurioli, Etienne Medard (Laboratoire Magmas et Volcans)* *Contact : *oryaelle.chevrel@xxxxxx *Application procedure* Interested candidates are invited to: 1. Contact Oryaëlle Chevrel ( oryaelle.chevrel@xxxxxx ) in order to discuss the project and send the following package (with copy to tim.druitt@xxxxxx ) ï? A curriculum vitae including name, nationality, contact details, education history with dates and annual exam results, employment history, and any other information. ï? A letter of motivation no longer than two pages ï? Photocopies of official certificates for undergraduate and Masters years, with courses taken and grades. 2. Arrange for letters of support by two academic referees to be sent confidentially by email to Oryaëlle Chevrel ( oryaelle.chevrel@xxxxxx ). These letters should be sent directly by each referee and should not transit via the candidate. The application package and references may be in French or English. *They should reach us no later than 20 May 2021. *Incomplete or late applications will not be taken into account. Candidates will be shortlisted, and the shortlisted applicants will be invited to an online interview at the beginning of June for a decision immediately afterwards. In the event of enquiries or problems, please contact ClerVolc scientific director T. Druitt ( tim.druitt@xxxxxx ) *Salary and other details* The annual (three-year) salary for a ClerVolc PhD in 1920 euros per month, before any tax (which is confortable for the cost of life in Clermont-Ferrand). The ability to speak French is not necessary, but any successful non-francophone candidates will be required to attend courses in the language. Overseas applicants will be required to apply for a student visa, aided by the university. Please note that only candidates who have either completed a Masters degree (or equivalent, to be specified), or who are in the processes of studying for one and will graduate this year, are eligible to apply for PhD grants in the French system â??â??(PS : More PhD opportunities at Clermont-Ferrand are also available here: http://clervolc.uca.fr/recruitment/ ) 3-3-3-3-3-3-3-3-3-3-3-3-3 ============================================================== Volcano Listserv is a collaborative venture among Arizona State University (ASU), Portland State University (PSU), the Global Volcanism Program (GVP) of the Smithsonian Institution's National Museum of Natural History, and the International Association for Volcanology and Chemistry of the Earth's Interior (IAVCEI). 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