414a Postgraduate Office
Research title: Delivery of water to early Earth by carbonaceous chondrite meterorites
I am a PhD student in Earth Sciences aspiring to become a researcher in Cosmochemistry.
My current project is on the delivery of water on Earth by carbonaceous chondrites, under the supervision of Prof. Martin Lee and Dr. Lydia Hallis at the University of Glasgow.
I have a BSc in Geology from the Université du Québec à Chicoutimi, as well as an MSc in Earth and Planetary Sciences, with a specialization in Geochemistry, which I started at the École Normale Supérieure de Lyon and finished at the Institut de Physique du Globe de Paris.
I have worked on 4 distinct projects alongside my academic cursus:
- Geochemical analysis of Abee (an EH4-type chondrite) using Micro-XRF spectrometry. This study revealed the existence of chemical variations within and between clasts, and matrix of Abee and suggests an impact-based differentiation mechanism. This project has been published in Geochimica et Cosmochimica Acta in September 2017.
- Lithological characterisation of a peripheral part of the nested crater ejecta layer at the concentric marine-target Lockne impact structure in Sweden. This study comprises the logging of an impactite drill core. The observations were also supported by magnetic susceptometry, clast-size logging measurements and impact cratering experiments.
- Study of Ca stable isotopes as tracers of early planetary reservoirs and processes. This study comprises Ca isotopic composition measurements (43Ca/42Ca and 44Ca/42Ca) of chondrules from type 3 L and LL ordinary chondrites using MC-ICPMS. Iron IIE, lunar, eucrite, achondrite samples, as well as Ca-rich mineral phases such as oldhamite (CaS) were also analyzed.
- Detection and tracing of the origin of IDPs (Interplanetary Dust Particles) within marine sediments using noble gas mass spectrometry. A new protocol for noble gas analysis was developed specifically for Xe, which possesses isotopes formed by r-process nucleosynthesis (produced by supernovae), in order to detect presolar grains.
- Higgins, M.D. and Martin, P.E.M., 2018. Chemical variations within and between the clasts, and the matrix of the Abee enstatite chondrite suggest an impact-based differentiation mechanism. Geochimica et Cosmochimica Acta, 220, pp.71-81. https://doi.org/10.1016/j.gca.2017.09.047