More Like this

1. The Sedimentary Geochemistry and Paleoenvironments Project

   https://doi.org/10.1111/gbi.12462  

   Farrell, Úna C.; Samawi, Rifaat; Anjanappa, Savitha; Klykov, Roman; Adeboye, Oyeleye O.; Agic, Heda; Ahm, Anne‐Sofie C.; Boag, Thomas H.; Bowyer, Fred; Brocks, Jochen J.; et al (July 2021, Geobiology)
2. Tapestry Beaver Pond Geochemistry

   https://doi.org/10.4211/hs.8bb8e869e2b9442989163fbaa1d616ea  

   Ledford, Sarah (July 2025, HydroShare)

   Major ion geochemistry and isotopes of nitrate for the Tapestry beaver pond in Atlanta, GA. Samples were collected from the surface from June 2019-March 2020 and from the hyporheic zone from June-August 2019. Logger data (DO and specific conductance at 10 minute intervals) were also collected from June-August 2019. Isotopes of nitrate (d15N and d18O) were measured for a subset of June-August 2019 surface and hyporheic samples. Data were used in the paper "Urban beaver dam shows hyporheic exchange helps mediate high nutrient groundwater and a high productivity pond" 

   more » « less
3. 2024 Hydrothermal Geochemistry and Critical Minerals Meeting—Abstracts

   https://doi.org/10.58799/B-166  

   Gysi, A P; Hurtig, N C; Waters, L (June 2024, Bulletin New Mexico Bureau of Mines Mineral Resources)

   Gysi, A P; Hurtig, N C; Waters, L (Ed.)

   A major goal of this conference is to tackle the challenges described above and build a new network of scientists and professionals with different expertise, including but not limited to experimental geochemistry/chemistry, thermodynamic/geochemical modeling and databases, reactive mass transport modeling, molecular dynamic simulations, element extraction/separation technologies, theoretical thermodynamics and equations of state, and mineralogy, ore deposits, and processes in natural systems. Another important aspect is the participation of students and training the next generation of leaders in the field of critical minerals and thermodynamics. Participants at this meeting include scientists from academia and national laboratories, graduate and undergraduate students, as well as liaisons from industry, governmental agencies, and geological surveys. This five-day meeting includes daily talks, keynotes, small workshops, discussion sessions, and two evenings of poster sessions for students. One day includes an excursion to the nearby Lemitar Mountains carbonatite rare earth elements deposit to discover the geology of New Mexico and allow participants to link geosciences with other areas of basic energy sciences. We will also organize a geochemical modeling workshop using our “in-house” MINES thermodynamic database (Gysi et al., 2023) to show an application of thermodynamics to modeling critical mineral deposits. 

   more » « less
4. Serpentinization: Connecting Geochemistry, Ancient Metabolism and Industrial Hydrogenation

   https://doi.org/10.3390/life8040041  

   Preiner, Martina; Xavier, Joana C; Sousa, Filipa L; Zimorski, Verena; Neubeck, Anna; Lang, Susan Q; Greenwell, H Chris; Kleinermanns, Karl; Tüysüz, Harun; McCollom, Tom M; et al (December 2018, Life)

   Rock–water–carbon interactions germane to serpentinization in hydrothermal vents have occurred for over 4 billion years, ever since there was liquid water on Earth. Serpentinization converts iron(II) containing minerals and water to magnetite (Fe3O4) plus H2. The hydrogen can generate native metals such as awaruite (Ni3Fe), a common serpentinization product. Awaruite catalyzes the synthesis of methane from H2 and CO2 under hydrothermal conditions. Native iron and nickel catalyze the synthesis of formate, methanol, acetate, and pyruvate—intermediates of the acetyl-CoA pathway, the most ancient pathway of CO2 fixation. Carbon monoxide dehydrogenase (CODH) is central to the pathway and employs Ni0 in its catalytic mechanism. CODH has been conserved during 4 billion years of evolution as a relic of the natural CO2-reducing catalyst at the onset of biochemistry. The carbide-containing active site of nitrogenase—the only enzyme on Earth that reduces N2—is probably also a relic, a biological reconstruction of the naturally occurring inorganic catalyst that generated primordial organic nitrogen. Serpentinization generates Fe3O4 and H2, the catalyst and reductant for industrial CO2 hydrogenation and for N2 reduction via the Haber–Bosch process. In both industrial processes, an Fe3O4 catalyst is matured via H2-dependent reduction to generate Fe5C2 and Fe2N respectively. Whether serpentinization entails similar catalyst maturation is not known. We suggest that at the onset of life, essential reactions leading to reduced carbon and reduced nitrogen occurred with catalysts that were synthesized during the serpentinization process, connecting the chemistry of life and Earth to industrial chemistry in unexpected ways. 

   more » « less
5. Geochemistry of Silicate and Oxide Inclusions in Sublithospheric Diamonds

   https://doi.org/10.2138/rmg.2022.88.07  

   Walter, Michael J.; Thomson, Andrew R.; Smith, Evan M. (July 2022, Reviews in Mineralogy and Geochemistry)