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December 2025 – present | Postdoctoral Research Fellow (RESTLESS Project)

Johannes Gutenberg–Universität Mainz, Germany.

Working with Prof. Dr. Virginia Toy.


Responsibilities

  • Systematically characterised heterogenous fault zones associated with the Upper Rhine Graben Fault.
  • Performed diligent fieldwork, 3D digital structural analysis, & statistical evaluation of fracture networks.
  • Assessed the risk of induced seismicity from exploitation of geothermal resources.

Supervision

  • 2026 – present: Friedrich Lingemann.: Multi-scale structural analysis of vesicular pseudotachylites in the Alpine Fault, New Zealand. BSc.
  • 2025 – present: Melanie Klups.: Transition from phreatomagmatic to magmatic eruptive activity at the Nastberg scoria cone (East Eifel). BSc.
  • 2025 – present: Claudia Feßler.: The evolution of the Nastberg scoria cone revealed by drone-based 3D imaging. MSc.
  • 2025 – 2026: Diana Daubner.: Lithological Framework, Geochemical Characteristics & Volcanic depositional Processes of the Schwarze Wand Scoria Cone (Nickenich, EEVF). MSc.

The RESTLESS Project investigates the risks of induced earthquakes in the Upper Rhine Graben in response to geothermal exploitation and is a BMWK-funded collaboration between researchers at Johannes Gutenberg-Universität Mainz, TU Darmstadt, and Friedrich-Alexander-Universität Erlangen, as well as industrial partners. This project consists of a highly holistic characterisation of faults in the region including outcrop structural analysis, SEM-based microstructural analysis, rock mechanical characterisation, and regional-scale fault slip risk assessments.

My role in this project has centred on the outcrop analysis which formed the basis of all other interpretations. This included diligent field-based structural observations of complex outcrops, constructing and interpreting photogrammetric virtual outcrop models, statistical characterisation of the observed fracture networks, construction of discrete fracture network (DFN) model based on these statistics, and finally finite element modelling of fluid-flow and pressure through these fractured rock masses.


I’m Alex Clarke

I am a structural geologist working as a Postdoctoral Researcher at Johannes Gutenberg–Universität Mainz and a hobbyist girl-with-camera.

My research focuses on the heterogeneities within large faults, shear zones, and subduction zone mélanges — how to map them, quantify them, and explain their origins. I am especially interested in 3D reconstructions of rocks and outcrops which allow detailed, realistic, and quantifiable models of natural phenomena. I also love to teach and I am interested in innovative and engaging methods of teaching earth sciences, both in the classroom and in the field.

In my free time, I enjoy photography and my images reflects my love of nature and the diverse forms nature can take.