Sylvain Petitgirard

Abstract Much of Earth’s carbon may have been stripped away from the silicate mantle by dense metallic-iron during core formation. However, at deep magma ocean conditions carbon becomes less siderophile and thus large amounts of it may be stranded instead in the deep mantle. Here, we describe the structure and compaction mechanisms of carbonate glass to deep mantle pressures.

Experimental evidence for silica-enriched Earth’s lower mantle with ferrous iron dominant bridgmanite Izumi Mashino, Motohiko Murakami, Nobuyoshi Miyajima, Sylvain Petitgirard Proceedings of the National Academy of Sciences Oct 2020, 201917096; DOI: 10.1073/pnas.1917096117

Recently, Spengler et al.20 demonstrated that the NMR sensitivity, in particular the limit of detection in the time domain, can be locally amplified with the use of so called Lenz lenses (LL). The LL-resonators form, in a general sense, a flux transformer picking up the high frequency B field generated by an excitation coil which is part of a standard LC tank circuit. The stored magnetic field energy will be deposited within a geometrically predefined area, leading to a locally enhanced B field.