About the Program
ETH Zürich invites applications for a fully funded PhD in isotope geochemistry titled “Doctoral position in isotope geochemistry for marine authigenic clay formation and the silicon cycle” at the Earth Surface Geochemistry Group, Department of Earth and Environmental Sciences. This doctoral position focuses on understanding the formation of marine authigenic clay (reverse weathering) and its impact on the global silicon cycle and silicon isotopes, addressing key processes in early diagenesis and ocean chemistry.
Dr Gregory de Souza will supervise the project and aligns with the research theme of Earth surface processes and biogeochemical cycling. The research duration is 4 years and is based in Zurich, Switzerland, with an expected start date in 2026. The project offers advanced laboratory training in isotope geochemistry, electron microscopy, and mass spectrometry, alongside opportunities for international collaboration, conference participation, and possible oceanographic field campaigns.
Program Details
- Position: Fully funded PhD Position / Doctoral Researcher
- Institution: ETH Zürich
- Department/Faculty: Earth Surface Geochemistry Group, Department of Earth and Environmental Sciences
- Supervisor: Dr Gregory de Souza
- Location: Zurich, Switzerland
- Start Date (Anticipated): 2026
- Duration: 4 years
- Funding: Fully funded doctoral position with secured project funding
- Working Hours: 100% (full-time)
- Required Degree/Diploma: Master’s degree (or equivalent) in Earth Sciences, Environmental Sciences, Geochemistry, or a closely related field.
Where Did We Come From? Turn the Page and See
Research Focus/Area
- Marine authigenic clay formation (reverse weathering)
- Silicon biogeochemical cycle
- Stable silicon isotope geochemistry
- Early diagenesis in marine sediments
- Experimental and natural phyllosilicate formation
- Advanced mineralogical and microscopic characterisation
Eligibility & Qualifications
Minimum Requirements:
- Master’s degree (or equivalent) in a relevant discipline
- Strong interest in isotope geochemistry and marine geochemistry
- Good command of English (written and spoken)
- Ability to work independently and collaboratively
Preferred Qualifications:
- Experience in laboratory-based geochemical research
- Familiarity with MC-ICP-MS, ICP-MS, or clean laboratory procedures
- Interest in clay mineralogy, SEM, TEM, or FTIR techniques
- Strong academic record and research curiosity
Key Features of the Program
- Training in state-of-the-art mass spectrometry facilities
- Access to advanced electron microscopy via ETH Zürich’s ScopeM centre
- International and interdisciplinary research environment
- Opportunities to present research at international conferences
- Professional academic development and networking support
- Potential participation in marine sampling campaigns
Application Process
How to Apply:
Applications must be submitted online via the ETH Zürich application portal.
Required Documents:
- Curriculum Vitae (CV)
- Brief motivation letter
- Names of three academic referees
Important Dates
- Applications Open: Ongoing
- Application Review Begins: 15 January 2026
- Interviews: As applications are reviewed
Where to Apply
- University Website: ETH Zürich
- Official Notification: click here
- Application Portal: click here
Learn PhD opportunities: click here
