

Stromatolites are layered organo-sedimentary deposits consisting of fossilised microbial mats, and contain evidence of their interactions with the environment. Although they are currently restricted to relatively extreme settings, stromatolite-building communities were an important part of the Precambrian biosphere with a fossil record stretching back almost 3.5 Gyr.
In this project, the student will perform detailed and advanced microscopic and geochemical characterisation of a suite of stromatolitic samples from various sequences of the Neoproterozoic Congo craton with a view to reconstructing the palaeoenvironmental conditions under which these microbial communities formed and to determine potential metabolic pathways that dominated – or played roles in – the communities. These results will be integrated within the current framework of understanding of Neoproterozoic environmental change. A focus will be made on using optical microscopy, scanning and transmission electron microscopy, isotope geochemistry and Raman and infrared microspectroscopy; however, we will also make use of advanced analytical techniques using synchrotrons and other national and international facilities where appropriate.
Stromatolites of the Congo craton have received very limited attention and will therefore provide an excellent opportunity to further our understanding of the co-evolution of Earth and Life throughout the Neoproterozoic with the potential for novel and unanticipated discoveries.
The student will receive training in microscopic and geochemical analysis of geological materials via one-to-one instruction by the supervisory team. A particular focus will be made on high-resolution microscopy using optical and electron microscopy facilities, elemental geochemistry and multiple isotope geochemistry, all of which are available at the host institutes. External partners from the Royal Museum for Central Africa will provide complementary training in understanding the geology and stratigraphy of the sampling localities.
This project will provide opportunities to develop a career in scientific research within an academic context; however, the analytical skills developed will be readily transferable to other domains. As such, the project would enable the candidate to develop a strong foundation in analytical geochemistry with broad career trajectory possibilities.