Jean-Philippe Perrillat

Learn More
The global geochemical carbon cycle involves exchanges between the Earth's interior and the surface. Carbon is recycled into the mantle via subduction mainly as carbonates and is released to the atmosphere via volcanism mostly as CO(2). The stability of carbonates versus decarbonation and melting is therefore of great interest for understanding the global(More)
Silica is the most abundant oxide component in the Earth mantle by weight, and stishovite, the rutile-structured (P4(2)/mnm) high-pressure phase with silica in six coordination by oxygen, is one of the main constituents of the basaltic layer of subducting slabs. It may also be present as a free phase in the lower mantle and at the core-mantle boundary. Pure(More)
High-pressure H2O polymorphs among which ice VI and ice VII are abundant in the interiors of large icy satellites and exo-planets. Knowledge of the elastic properties of these pure H2O ices at high-temperature and high-pressure is thus crucial to decipher the internal structure of icy bodies. In this study we assess for the first time the(More)
We present the first results of in situ density measurements on lunar primitive picritic glass compositions at superliquidus conditions in the pressure (P) range ~0.5-5.0 GPa and temperature (T) range 1800 and 2200 K using synchrotron X-ray absorption measurements. Experiments were conducted on synthetic equivalents of Apollo 15C “green” glass (low titanium(More)
  • 1