Romain Tilhac Personal webpage

Research

My research relates to the compositional evolution of the Earth’s mantle through the study of mafic and ultramafic terranes and xenoliths. I use trace-element and isotope geochemistry and petrological modelling to understand the genesis of mantle-derived magmas, their sources and differentiation processes. I am especially interested in elemental mobility and isotopic fractionation in the sub-arc mantle and the role of melt-peridotite interaction during the formation of pyroxenites.

Find out more on ResearchGate.


Current projects

Oceanic basalt sources and melting processes

Constraining the impact of melting and lithospheric melt-rock interaction processes to identify the signature of recycled lithologies and other source components in primary oceanic basalts, intra-plate volcanics and associated xenoliths.

Characterizing the nature and composition of magmatic products (and their metamorphic and metasomatic overprints) in the sub-arc mantle and lower crust to constrain:

  • the impact of fluid-melt-rock interaction on the evolution of arc magmas;
  • the impact of their potential recycling on the dynamics and magmatism of the convective mantle.

Studied localities include the Cabo Ortegal Complex (Galicia, NW Spain) and the Trinity Ophiolite (California, USA).


Previous projects

Tethysian ophiolites

Geochemistry of subduction-related magmatics along the Paleo- and Neo-Tethys suture of Anatolia, Iran and the Himalayas.

Sedimentary basins and carbonate diagenesis

Textural identification of original and diagenetic features in carbonate speleothems and implications for their dating and use as paleo-environmental and paleo-climate proxies. Relationships between fluid circulation and deformation in sedimentary basins.