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Introduction
My research interests primarily lie in the application of transition metal stables isotopes proxies to track the nature and origin of mantle carbon and assess the role of subduction in the deep carbon cycling. Other current research projects include constraining ore component mobility in hydrothermal fields, developing new analytical methods in stable isotope geochemistry and unravelling water systematics of the oceanic mantle.
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Publications (11)
Nickel stable isotope ratios have attracted a growing interest across the (bio)geochemical and environmental sciences since the late 2000s. Accuracy and precision of Multi-Collector Inductively Coupled-Plasma Mass Spectrometry (MC-ICP-MS) measurements depend crucially on efficient chemical purification of the target analyte to avoid spectral and no...
Subduction at convergent margins introduces a range of sedimentary and crustal materials into the mantle, providing the most dominant form of heterogeneity in the source of oceanic basalts. Yet, the relationship between geochemical variability and lithologic heterogeneities in the Earth's mantle remains controversial. In this paper, we comprehensiv...
Subduction zones are active sites of chemical exchange between the Earth’s surface and deep interior and play a fundamental role in regulating planet habitability. However, the mechanisms by which redox sensitive elements (e.g., iron, carbon and sulfur) are cycled during subduction remains unclear. Here we use Fe stable isotopes (δ56Fe), which are...
The Mariana forearc is a unique setting on Earth where serpentinite mud volcanoes exhume clasts originating from depths of 15 km and more from the forearc mantle. These peridotite clasts are variably serpentinized by interaction with slab derived fluid, and provide a record of forearc mantle dynamics and changes in geochemistry with depth. During I...
Ultramafic hosted hydrothermal deposits are ubiquitous along slow-spreading ridges such as the Mid-Atlantic Ridge (MAR; e.g., Ashadzé Rainbow, Lost City) where they exert a major control on the cycling of economically important elements (e.g., Zn, Cu, Ni). However, the origin of metal mobility in these environments remains unclear. Here we use Zn (...
The Mariana forearc is a unique setting on Earth where forearc ultramafic clasts, originated at depths greater than 20 km, are exhumed at the surface. These rocks are serpentinized by interaction with slab derived fluids during the onset of subduction. They provide a record of the forearc mantle dynamic and fluid geochemistry at depth. We take adva...
Mantle stable isotope heterogeneities resulting from high-temperature processes have been reported for a growing number of elements. Among them, Zn is of great interest due to its single valence state (Zn 2+) in compounds or complex ions which makes it insensitive to redox conditions. Zn isotopic compositions (δ 66 Zn, relative to JMC-Lyon) in igne...
To investigate metal fractionation in mantle differentiation processes, Zn stable isotopes in peridotites have a great potential as sensitive tracer of mantle partial melting, metasomatism and mineral segregation. Yet, Zn isotope data on mantle peridotites remain scarce and exclusively originating from continental settings (e.g. cratonic, off-crato...
ABSTRACT (270 words):
The study presents major and trace element compositions of whole-rocks and minerals of 24 spinel harzburgite xenoliths from the Lac Michèle locality in the northern part of the Kerguelen Archipelago (South Indian Ocean). The samples are modally homogeneous and large enough to provide representative whole-rock samples. Their Mg...
