The Ruhr-University Bochum (RUB) is one of Germany's leading research universities, addressing the whole range of academic disciplines. A highly dynamic setting enables researchers and students to work across the traditional boundaries of academic subjects and faculties. To create knowledge networks within and beyond the university is RUB's declared aim.

The Department of Sediment- and Isotope Geology, Institute of Geology, Mineralogy and Geophysics, Faculty of Geosciences, Ruhr-University Bochum, Germany, offers a

PhD position (m/f/d) for 3 years (75% TV-L E13) in the DFG-funded project `Advancing speleothem petrography and geochemistry proxies using cave-analogue experiments┬┤

The Project:

Speleothem carbonates are among the most extensively investigated climate archives. Specifically, cave monitoring programmes and cave analogue laboratory experiments are efficient tools for understanding processes controlling the precipitation of speleothems and their geochemical properties. Among the climate proxies studied, however, speleothem crystal fabrics and their bearing on environmental parameters remain underexplored, highlighting the significance and potential impact of our research. In this project, controlled state-of-the-art laboratory experiments under cave-analogue conditions will be carried out in the laboratories of the department to investigate the relation between calcite crystal morphology, elemental ratios, and distribution coefficients (DMg and DSr). Results of these cave-analogue experiments will be linked to data previously obtained during field cave monitoring studies and ultimately to the corresponding stalagmites and their crystal fabric. With this project, we intend to take a big step towards linking the 3D crystal morphology to the 2D speleothem crystal fabrics and using specific crystal fabrics as a novel proxy in paleoclimate research.


  • Carrying out the laboratory experiments independently after a training period
  • Carrying out the inorganic geochemical and petrographic analyses (pH, EC, T, alkalinity, element concentrations via ICP-OES, normal- and polarized light microscopy, SEM, EBSD, EMPA, LA-ICP-MS)
  • Writing scientific articles and a dissertation according to the specifications of the Faculty of Geosciences at the Ruhr University Bochum
  • Participation in national and international scientific conferences
  • Active participation in a dynamic research environment in Bochum


We seek an enthusiastic PhD student holding an M.Sc. degree in Sedimentology, Sedimentary Geochemistry, Sedimentary Petrography, Crystallography, Climate Research or a closely related geosciences discipline. The successful applicant should have proven knowledge of carbonate research and demonstrate the ability to write and communicate scientifically. Mastering the English language, both spoken and written, is a basic requirement for writing and communication in a scientific environment. We expect excellent social skills and a very high level of motivation. Experience with practical work in a geochemically oriented laboratory is desirable.

We offer:

  • Challenging and varied tasks with a high level of personal responsibility.
  • Support from and collaboration with competent colleagues
  • Team-oriented cooperation in a committed, international and appreciative team.
  • A friendly and collegial environment
  • A modernly equipped workplace

Additional information:

If the position is funded by third-party funds, the employee has no teaching obligation.

You can find information about TVL at:

At the request of the applicant (m,f,d), the staff council may be involved in selection interviews.

The Ruhr-University Bochum stands for diversity and equal opportunities. For this reason, we favour a working environment composed of heterogeneous teams, and seek to promote the careers of individuals who are underrepresented in our respective professional areas. The Ruhr-University Bochum expressly requests job applications from women. In areas in which they are underrepresented they will be given preference in the case of equivalent qualifications with male candidates. Applications from individuals with disabilities are most welcome.

Contact details for your application:

Please submit your application as a single PDF file to (cc to by 24.06.2024 at the latest. Your application should include a letter of motivation, a curriculum vitae and academic transcripts (copy of B.Sc. and M.Sc. certificates and any other relevant document), and contact information for at least two references.

Travel expenses for interviews cannot be refunded.

posted: 03 June 2024     Please mention EARTHWORKS when responding to this advertisement.