I enthusiastically joined the Diversity, Equality, and Inclusion sub-group at the European Association of Geochemistry. Our goal will be to "promote DEI initiatives that cultivate welcoming, kind, inspiring, and actively anti-discriminatory scientific cultures as well as safe, healthy, and supportive working environments. As such, the EAG DEI initiative shall serve as a model for STEM in optimizing participation of historically excluded and underrepresented peoples across all sectors, levels of employ, and positions of community leadership." This is an initiative to tackle racism and other biases in our academic circles. We hope to not only raise awareness on how gated geochemistry appears to be for underrepresented folks, but also to produce content describing key aspects of our problem at hand. We intend on discussing the intricate aspects of social reproduction within academia on a worldwide scale, but also with a special target on European institutions. We will host a n
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The isotopologue 15N15N of di-nitrogen could be measured in natural samples only at UCLA, in Edward Young's laboratory, with the Panorama mass spectrometer (see picture below). Only a large-radius mass spectrometer such as the Panorama, unique in the world, may allow resolving 15N15N from other compounds. This work's success is entirely due to the beauty of this instrument! Will upload a picture of the Panorama at UCLA!
Hi All, We've published our work in the journal Nature. We show that we can eliminate the confounding effect of air contamination in volcanic and hydrothermal gases, for the specific case of nitrogen. By substracting air contamination, we derive the di-nitrogen (N 2 ) molecular weight in various mantle sources. A new finding here is that various mantle sources, with variable 15N/14N ratios, have a near-constant N2/3He ratio. Because 3He is in the deep Earth is not recycled, the constant N2/3He ratios argue against nitrogen addition via subduction in various mantle sources. We built a 2-box model to show how over 4.5 Ga, the mantle and air may have exchanged considerably less nitrogen than previously suggested. In other words, the possibility that mantle nitrogen is primordial can no longer be excluced. In this theory, nitrogen would have been inherited from the time the Earth was being built via planetary accretion. proud of this work! Here is a link to vi