PhD : Influence of fluid circulation on sedimentary diagenesis following the Mayotte eruption (M/F)
Ifremer - French Research Institute for Exploitation of the Sea
State University (France), Browse similar opportunities
en
State University (France), Browse similar opportunities
Reference: PV-2021-908/1
Department/Office:
Duration of contract:3 ans
Start date:
Deadline for applications:02/05/2021
The Institute and the recruiting departement
A pioneer in ocean science, IFREMER’s cutting-edge research is grounded in sustainable development and open science. Our vision is to advance science, expertise and innovation to:
- Protect and restore the ocean
- Sustainably use marine resources to benefit society
- Create and share ocean data, information & knowledge.
With more than 1,500 personnel spread along the French coastline in more than 20 sites, the Institute explores the 3 great oceans: the Indian, Atlantic and Pacific oceans. A leader in ocean science, IFREMER is managing the French Oceanographic Fleet and its dedicated scientists create ground-breaking technology to push the boundaries of ocean exploration and knowledge, from the abyss to the atmosphere-ocean interface.
Well-established in the international scientific community, our scientists, engineers and technicians are committed to advance knowledge about our planet’s last unexplored frontiers. They provide the science we need for informed decision-making and public policy and they transfer this knowledge and technology to businesses to fulfill public and private needs. Core to our mission is also to strengthen public awareness about the importance of understanding the ocean and its resources, and empowering future generations of leaders through education and outreach national campaigns.
Founded in 1984, IFREMER is a French public organization and its budget approximates 240 million euros. It is operating under the joint authority of the French Ministry for Higher Education, Research and Innovation, the French Ministry for the Ecological and Solidary Transition, and the French Ministry of Agriculture and Food.
General areas of responsibility
The Department of Physical Resources and Deep-sea Ecosystems (REM) tackles scientific and technological challenges. Its research involves the study of the seafloor and the sub-seafloor, the geological evolution of continental shelves, past climate variation, geological risks, biodiversity and the dynamics of deep-sea ecosystems including biogeochemistry and the interaction between the biosphere and the geosphere. The student will be hosted in the deep sea environment laboratory (LEP) specialized in deep sea ecosystems.
Summary
Since May 2018, the Mayotte Island has been facing an unprecedented seismic-volcanic crisis which gave birth to a new submarine volcano in the east of the island. In the context of the multidisciplinary GEOFLAMME project, this thesis subject aims at understanding the impact of the volcano establishment on the sedimentary biogeochemical cycles linked to early diagenesis. Indeed, tectonic and magmatic mechanisms possibly lead to increased fluids circulation which may increase methane and/or CO2 inputs. How will current carbon budgets be impacted? Can we quantify the modifications in biogeochemical processes due to metal-rich particles (Fe, Mn) deposition during eruptions?
The thesis will focus on the results of the GEOFLAMME campaign in April-May 2021 during which samples of pore water and sediment at depths of up to 10 m in the sediments will be taken on a transect approaching the volcano and the areas affected by changes in circulation and deposition of volcanic particles. Analyses of the composition of fluids and sediments (including carbon isotopes in methane and inorganic carbon) will enable highlighting the diagenetic processes in sediments, the influence of the volcanic input and allow to answer questions about the control of methane and CO2 effluxes from these sediments.
Key words
Sediment, biogeochemistry, Mayotte volcanic eruption, fluids, isotopy
Required Knowledge, skills, and characteristics
Expected profil
Specific working conditions
This PhD fellowship is a real opportunity to work on Ifremer's scientific and technological priority themes and share the methodology and knowledge on climate change and ocean fluxes at LSCE. The gross monthly salary will be 1900 euros for a period of 3 years, which cannot be combined with other scholarships.
How to apply for this position?
The application file must include :
Your application must be compiled into 2 PDF files, up to 1.5 MB for each file:
In case of any problem in attaching your documents, please upload your CV on this page (this step is mandatory for your application to be considered) and send all the documents to the thesis supervisors :
lucie.pastor@ifremer.fr and rabouill@lsce.ipsl.fr
The deadline for applications is 2nd of May, 2021. Nevertheless, we strongly urge you to let us know as soon as possible of your intention to apply, by contacting the subject supervisor.
Doctoral students' contracts will start as of October 1st, 2021, subject to the submission of administrative documents authorizing Ifremer to recruit the doctoral student (certificate of completion of the Master 2 or engineering degree + visa for foreign doctoral students outside the EU).
How to apply for this position
Deadline for applications: 02/05/2021
All applications are processed exclusively via our website. Interested candidates can apply by clicking the “Apply” button.
Choose the country you wish to travel to study for free, work or volunteer
