<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Huang, Dongyang</style></author><author><style face="normal" font="default" size="100%">Siebert, Julien</style></author><author><style face="normal" font="default" size="100%">Sossi, Paolo</style></author><author><style face="normal" font="default" size="100%">Kubik, Edith</style></author><author><style face="normal" font="default" size="100%">Avice, Guillaume</style></author><author><style face="normal" font="default" size="100%">Murakami, Motohiko</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Nitrogen sequestration in the core at megabar pressure and implications for terrestrial accretion</style></title><secondary-title><style face="normal" font="default" size="100%">Geochimica et Cosmochimica Acta</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">Atmospheric loss</style></keyword><keyword><style  face="normal" font="default" size="100%">core formation</style></keyword><keyword><style  face="normal" font="default" size="100%">high pressure</style></keyword><keyword><style  face="normal" font="default" size="100%">metal-silicate partitioning</style></keyword><keyword><style  face="normal" font="default" size="100%">nitrogen</style></keyword><keyword><style  face="normal" font="default" size="100%">Volatile depletion</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2024</style></year><pub-dates><date><style  face="normal" font="default" size="100%">jul</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">https://doi.org/10.1016/j.gca.2024.05.010 https://linkinghub.elsevier.com/retrieve/pii/S0016703724002321</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">May</style></number><publisher><style face="normal" font="default" size="100%">Elsevier Ltd</style></publisher><volume><style face="normal" font="default" size="100%">376</style></volume><pages><style face="normal" font="default" size="100%">100–112</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Nitrogen (N) is the most abundant element in Earth&amp;#039;s atmosphere, but is extremely depleted in the silicate Earth. However, it is not clear whether core sequestration or early atmospheric loss was responsible for this depletion. Here we study the effect of core formation on the inventory of nitrogen using laser-heated diamond anvil cells. We find that, due to the simultaneous dissolution of oxygen in the metal, N becomes much less siderophile (iron-loving) at pressures and temperatures up to 104 GPa and 5000 K, a thermodynamic condition relevant to the bottom of the magma ocean in the aftermath of the moon-forming giant impact. Using a core–mantle–atmosphere coevolution model, we show that the impact-induced processes (core formation and/or atmospheric loss) are unlikely to account for the observed N anomaly, which is instead best explained by the accretion of mainly N-poor impactors. The terrestrial volatile pattern requires severe N depletion on precursor bodies, prior to their accretion to the proto-Earth.</style></abstract></record></records></xml>