1. Authigenic formation of clay minerals in the abyssal North Pacific
- Author
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Steiner, Zvi, Rae, James W. B., Berelson, William M., Adkins, Jess F., Hou, Yi, Dong, Sijia, Lampronti, Giulio I., Liu, Xuewu, Achterberg, Eric P., Subhas, Adam V., Turchyn, Alexandra V., 2 School of Earth and Environmental Sciences University of St Andrews St Andrews UK, 3 University of Southern California Los Angeles CA USA, 4 Department of Geology and Planetary Sciences California Institute of Technology Pasadena CA USA, 5 Department of Earth Sciences University of Cambridge Cambridge UK, 6 College of Marine Science University of South Florida St. Petersburg Campus St. Petersburg FL USA, 1 GEOMAR Helmholtz Centre for Ocean Research Kiel Kiel Germany, 7 Department of Chemistry Woods Hole Oceanographic Institution Woods Hole MA USA, University of St Andrews. School of Earth & Environmental Sciences, University of St Andrews. Centre for Energy Ethics, University of St Andrews. St Andrews Isotope Geochemistry, Steiner, Z [0000-0002-9584-4956], Rae, JWB [0000-0003-3904-2526], Hou, Y [0000-0002-0846-8615], Dong, S [0000-0002-5811-9333], Achterberg, EP [0000-0002-3061-2767], Subhas, AV [0000-0002-7688-6624], Turchyn, AV [0000-0002-9298-2173], and Apollo - University of Cambridge Repository
- Subjects
reverse weathering ,Atmospheric Science ,Global and Planetary Change ,calcium ,potassium ,DAS ,Reverse weathering ,ddc:549 ,Porewater ,Strontium ,MCP ,Potassium ,Environmental Chemistry ,Clay authigenesis ,Calcium ,strontium ,SDG 14 - Life Below Water ,clay authigenesis ,porewater ,General Environmental Science - Abstract
Present estimates of the biogeochemical cycles of calcium, strontium, and potassium in the ocean reveal large imbalances between known input and output fluxes. Using pore fluid, incubation, and solid sediment data from North Pacific multi‐corer cores we show that, contrary to the common paradigm, the top centimeters of abyssal sediments can be an active site of authigenic precipitation of clay minerals. In this region, clay authigenesis is the dominant sink for potassium and strontium and consumes nearly all calcium released from benthic dissolution of calcium carbonates. These observations support the idea that clay authigenesis occurring over broad regions of the world ocean may be a major buffer for ocean chemistry on the time scale of the ocean overturning circulation, and key to the long‐term stability of Earth's climate., Key Points: North Pacific red clay sediments are a sink for marine calcium, strontium, and potassium. Authigenic formation of clay minerals is prevalent in pelagic sediments throughout the North Pacific. The main mechanism for clay formation is recrystallization of aluminosilicates, neoformation can occur in biogenic silica rich sediments., EC H2020 PRIORITY “Excellent science” H2020 European Research Council http://dx.doi.org/10.13039/100010663, Blavatnik Family Foundation http://dx.doi.org/10.13039/100011643, Isaac Newton Trust http://dx.doi.org/10.13039/501100004815, Deutsche Forschungsgemeinschaft http://dx.doi.org/10.13039/501100001659, National Science Foundation http://dx.doi.org/10.13039/100000001, https://doi.pangaea.de/10.1594/PANGAEA.946881
- Published
- 2022