Job offers

ER3 – Postdoctoral position: Calibration of isotopic tracers to determine water-rock interactions: an experimental approach

Supervisors: D. Teagle (University of Southampton) & M. Godard (CNRS-Géosciences Montpellier) / Ph. Gouze (CNRS-Géosciences Montpellier), B. Jamtveit (University of Oslo), W. Bach (University of Bremen)

Objectives: To test and calibrate models of deep crustal mineral-fluid exchange; To better understand the mechanisms of hydrothermal fluid-rock chemical exchange at mid-ocean ridges; Improve estimates of ocean ridge fluid fluxes.

Application call closed

ESR1 – PhD position: Melt-rock interactions at the mantle-crust interface in oceanic spreading environments: An experimental investigation

Supervisors: P. Fumagalli (University of Milano) / M. Valle (Petroceramics SpA) & J. Koepke (Gottfried Wilhelm Leibniz University of Hannover)

Objectives: Acquisition of experimental expertise, development of strategies to simulate geological processes at high pressure and temperature in multi-component systems; Experimentally-based modelling of reaction mechanisms, kinetics, and effect of crystallization and reactive porous melt flow on the chemistry and physics of oceanic lithosphere.

This position has been filled

ESR2 – PhD position on melt – rock interactions in the oceanic lithosphere: microstructural and petro-geochemical constraints from ophiolites

Supervisors: E. Rampone & L. Crispini (University of Genova) / D. Brunelli (University of Genova); M.Godard & B. Ildefonse (CNRS-Géosciences Montpellier); D. Teagle (University of Southampton)

Objectives: Define field relations of crustal rocks and host mantle peridotites in selected ophiolites, to constrain styles and mechanisms of magma intrusion; Provide geochemical and microstructural tools to constrain the origin (mantle vs. magmatic) of olivine in the lower oceanic crust, and determine the role of fractional crystallization and reactive porous melt flow. Model the effect of melt-rock reaction acting in the lower oceanic crust on the evolution of MORBs.

This position has been filled

ESR3 – PhD position: Melt-rock interactions in the oceanic lithosphere: microstructural and petro-geochemical constraints from drill-cores

Supervisors: B. Ildefonse & M. Godard (CNRS-Géosciences Montpellier) / B. Rampone (University of Genova), D. Teagle (University of Southampton)

Objectives: Acquire detailed information on microstructural and petro-geochemical signatures of gabbroic rock samples from ocean crust drill cores (ODP and IODP Expeditions; Mid-Atlantic Ridge and Southwest Indian Ridge); Understand and quantify to what extent crystallization and reactive porous melt flow in the lower oceanic crust may modify the chemistry of melts and the physico-chemical properties of the oceanic lithosphere.

This position has been filled

ESR4 – PhD position: Experimental rock/brine interaction at high and very high temperatures in magmatic systems

Supervisor: J. Koepke & R. Almeev (Liebniz Universität Hannover), P. Fumagalli (University of Milan) & D. Teagle (University of Southampton)

Objectives: Investigate experimentally rock/brine interactions at very high temperature to evaluate the mechanisms of the ongoing magmatic reactions in the deep crust and shallow mantle beneath mid-ocean ridges; Apply experimental results to nature by comparing experimental results with hydro-magmatic amphiboles from the oceanic crust by measuring bulk & mineral elemental and isotopic compositions to evaluate the extent of rock/water/brines exchanges at ridges.

This position has been filled

ESR5 – PhD position: Hydrothermal cooling of the lower oceanic crust

Supervisors: D.A.H. Teagle & T. Henstock (University of Southampton) / J. Koepke (Liebniz Universität Hannover), B. Ildefonse (CNRS-Géosciences Montpellier), B. Jamtveit (University of Oslo)

Objectives: To test end member models of the magmatic accretion of the lower oceanic crust as exposed in the Samail ophiolite, Oman. This study will establish the geometry and distribution of magma chambers and it will identify hydrothermal fluid flow pathways and quantify the time integrated hydrothermal fluid fluxes. The role of of deep faults in channelling seawater-derived hydrothermal fluids to depth in the crust is of specific interest. Experiments will improve our knowledge of trace element diffusion in olivine.

This position has been filled

ESR6 – PhD position: Replacive formation of massive sulphide deposits: An experimental approach

Supervisors: W. Bach (University of Bremen) / Ph. Gouze & M. Godard (CNRS-Géosciences Montpellier), M. Schanche (Nordic Mining ASA)

Objectives: Replacement of sulphate by sulphide is common in the formation of seafloor massive polymetallic ore bodies. This process is highly non-uniform and affected by poorly understood couplings between the evolution of permeability distribution and sulphate dissolution / sulphide precipitation. The main project objective is to gain insights into these couplings and use the results in improving numerical models of reactive flow.

This position has been filled

ESR7 – PhD position: Mechanical controls on the rate of serpentinization

 Supervisors: B. Jamtveit & H. Austrheim (University of Oslo) / Ph. Gouze & M. Godard (CNRS – Géosciences Montpellier), C. Garrido (CSIC- University of Granada)

Objectives: Constrain the extent of brittle deformation in the oceanic crust by reviewing seismological data; Characterize the extent of micro and macrofracturing in incompletely serpentinized oceanic crust; Constrain the coupling between reaction driven stresses and regional stresses for fracturing associated with serpentinization processes by means of numerical modelling

This position has been filled

ESR8 – PhD position: Hydrothermal fluxes in the mantle lithosphere: Experimental study of the serpentinization and H2 / CO2 exchanges

Supervisors: M. Godard & P. Gouze (CNRS-Géosciences Montpellier) / W. Bach (University of Bremen), C. Garrido (University of Granada), B. Jamtveit & H. Austrheim (University of Oslo), C. Fichler & B. Berger (Statoil)

Objectives: Investigate the feedback effects between hydration reactions and hydrodynamic properties; Characterize their impact on the effective reactivity and sustainability of the system, on hydrogen production and carbon budget.

 This position has been filled

ESR9 – PhD position in Petrology and Geochemistry: natural constraints on carbonation of ultramafic rocks

Supervisors: C.J. Garrido (University of Granada) / W. Bach (University of Bremen), B. Ildefonse, M. Godard (CNRS-Géosciences Montpellier), B. Jamtveit (University of Oslo)

Objectives: To investigate natural examples of carbonated serpentinites preserving different stages of carbonation of ultramafic rocks to provide essential insight into the role of serpentinite carbonation in the global carbon cycle; Use natural constrains to develop strategies for in situ mineral carbonation of serpentinite for CO2 sequestration.

This position has been filled

ESR10 – PhD position : Carbonate precipitation in alkaline serpentine-hosted hydrothermal vents

Supervisors: J.M. Garcia-Ruiz & C. Garrido (University of Granada) / M.A. van Zuilen, B. Menez (Institut de Physique du Globe de Paris), W. Bach (University of Bremen)

Objectives: To search for geochemical self-assembled complex mineral shapes and textures in natural samples from alkaline environments. To investigate non-biological routes of chemical coupling between abiotic organic compounds and minerals in a life-free hydrothermal system by means of laboratory experiments; This combined approach will potentially identify morphological differences between abiotic versus biotic crystallization in natural alkaline environments.

This position has been filled

ESR11 – PhD position: The ocean crust as microbial incubator

Supervisors: B. Menez (Institut de Physique du Globe de Paris) / W. Bach (University of Bremen), D. Brunelli (University of Genova)

Objectives: Acquire/develop expertise in high resolution techniques for the search of biosignatures, in situ in oceanic crust samples; Explore the metabolic diversity, energy sources, and biogeochemical transformations of deep ecosystems in the oceanic lithosphere; Develop upscaling models constrained by bioenergetic considerations that aim at predicting biomass production at depth along with its impact on fluid circulations and elemental budgets.

This position has been filled

ESR12- PhD position: Geophysical expression of serpentinites: Mapping the reactions that produce magnetic minerals and developing exploration tools for potential economic deposits

Supervisors: S. McEnroe (Norwegian University of Science and Technology) & C. Fichler (Statoil) / T. Henstock (University of Southampton)

Objectives: Develop geophysical tools for mapping ultramafic rocks tied to deposits; measure high- and low-temperature magnetic properties of serpentines and associated rocks; microscopic observation & analyses of oxides; identify processes that create or destroy magnetic minerals related to serpentinites; integrate geophysical (magnetic, seismic, gravity, etc.) and geological data (geochemistry, tectonics, etc.) with the physical properties to map serpentinization reactions.

This position has been filled.

ER1 – Postdoctoral position: Importance of pre-emplacement processes upon economically fertile mafic melts

Supervisors: R. Berg-Edland Larsen, S. McEnroe (Norwegian University of Science and Technology) & M. Schanche (Nordic Mining SPA)

Objectives: Develop refined exploration models and methods for future discoveries of unexposed and exposed onshore and offshore ore-deposits. Unravelling positive and negative economic fertilization of mantle derived igneous melts during their ascent through oceanic and continental lithospheric segments.

This position has been filled.

ER2 – Postdoctoral position: Multi-scalar modelling of hydrothermal fluxes in the mantle lithosphere

Supervisors: Ph. Gouze & M. Godard (CNRS-Géosciences Montpellier) / V. Hebert & O. Rodriguez (VOXAYA), B. Jamtveit & A. Malthe-Sorenssen (University of Oslo), T. Henstock (University of Southampton), W. Bach (University of Bremen)

Objectives: Investigate the control of pore scale properties and reaction-induced mass transfers on fluid hydrodynamics; Application to modelling of reactive fluid flow in hydrated mantle lithosphere

This position has been filled.