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MY RESEARCH
Intriguing carbonate calcium- and barium-rich microspheres, embedded in an organic matrix, were observed for the first time in 2012 in meso-oligotrophic Lake Geneva, during a routine lake-water quality survey. These microspheres hold high concentrations of strontium and barium, compared to the undersaturated water of Lake Geneva. Understanding the origin of these micropearls is the central theme of my research.
RESEARCH INTERESTS
- SEM imaging
- Freshwater lakes microfauna
- Sedimentology
- Micropaleontology
ONGOING PROJECTS
PhD thesis « Alkaline-earth metal precipitates in lacustrine environment: characterization, spatio-temporal distribution and origin. »
SCIENTIFIC ASSISTANT FOR
- Scanning Electron Microscopy
- Optical Cathodoluminescence Microscopy
MY PUBLICATIONS
- Jaquet, J.M., Nirel, P. & Martignier, A. Preliminary investigations on picoplankton-related precipitation of alkaline-earth metal carbonates in meso-oligotrophic lake Geneva (Switzerland). J. Limnol. 72, 592-605 (2013).
- Martignier, A., Pacton, M., Filella, M., Jaquet, J.M., Barja, F., Pollok, K., Langenhorst, F., Lavigne, S., Guagliardo, P., Kilburn, M.R., Thomas, C., Martini, R., Ariztegui, D. Intracellular amorphous carbonates uncover a new biomineralization process in eukaryotes. Geobiology, DOI: 10.1111/gbi.12213 (2016).
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