Laboratoire Magmas et Volcans

Micromechanical Insights Into the Cyclic Behavior of Fault‐Valve Systems

Abstract Cyclic fluid pressurization can promote repeated fault reactivation and transient permeability changes, a behavior often discussed within the fault‐valve concept in which faults alternate between acting as hydraulic barriers and conduits. To investigate the micromechanic...

Long-term preservation of early-formed silicate reservoirs in the deep mantle: New insight from 146Sm-142Nd systematics in Hawaiian basalts

Short-lived radiogenic isotope systems provide unique constraints on the preservation of early-formed reservoirs in Earth's mantle. We present the largest high-precision μ 142 Nd dataset for a single hotspot, comprising 55 analyses of 29 shield-stage tholeiitic basalts from the H...

Carbon solubility and liquid–liquid immiscibility in Fe–C–S ternary system up to 6 GPa: implications for the core of small planetary bodies

Abstract High-pressure, high-temperature experiments were conducted in a multi-anvil press using seven different starting compositions to investigate the phase relations of Fe–C–S liquids at pressures up to 6 GPa and temperatures up to 2000 K. Quenched samples revealed immiscible...

Magnetic insights into the aqueous alteration of CM chondrites

CM chondrites are the archetypal group of aqueously altered meteorites, preserving records of water-rock interactions on planetesimals. Here, we couple rock magnetic properties with modal mineralogy measured from 48 CM chondrites to explore aqueous alteration through its influenc...