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Authigenic Formation of Clay Minerals in the Abyssal North Pacific

Steiner, Zvi and Rae, James W. B. and Berelson, William M. and Adkins, Jess F. and Hou, Yi and Dong, Sijia and Lampronti, Giulio I. and Liu, Xuewu and Achterberg, Eric P. and Subhas, Adam V. and Turchyn, Alexandra V. (2022) Authigenic Formation of Clay Minerals in the Abyssal North Pacific. Global Biogeochemical Cycles, 36 (11). Art. No. e2021GB007270. ISSN 0886-6236. doi:10.1029/2021gb007270.

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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.

Item Type:Article
Related URLs:
URLURL TypeDescription
Steiner, Zvi0000-0002-9584-4956
Rae, James W. B.0000-0003-3904-2526
Berelson, William M.0000-0002-1526-3802
Adkins, Jess F.0000-0002-3174-5190
Hou, Yi0000-0002-0846-8615
Dong, Sijia0000-0002-5811-9333
Lampronti, Giulio I.0000-0002-1430-3446
Liu, Xuewu0000-0003-2896-3063
Achterberg, Eric P.0000-0002-3061-2767
Subhas, Adam V.0000-0002-7688-6624
Turchyn, Alexandra V.0000-0002-9298-2173
Additional Information:This study was funded by a Blavatnik postdoctoral fellowship to ZS, an Isaac Newton Trust grant to AVT and ZS, ERC StG 307582 (CARBONSINK) to AVT, and DFG Grant 458035111 to ZS. The cruise on-board RV Kilo Moana was funded by NSF Ocean Acidification Grant OCE1220600. We thank Gilad Antler for assisting with sample processing during CDisK-IV, Abby Lunstrum for analyzing particulate inorganic carbon, Christopher Jeans for discussions about clay minerals, Laura Healy for support with the particle size analyses, Harold Bradbury for support with the TIMS and Mervyn Greaves for support with the ICP-OES. Open Access funding enabled and organized by Projekt DEAL.
Group:Division of Geological and Planetary Sciences
Funding AgencyGrant Number
Blavatnik Family FoundationUNSPECIFIED
Isaac Newton TrustUNSPECIFIED
European Research Council (ERC)307582
Deutsche Forschungsgemeinschaft (DFG)458035111
Issue or Number:11
Record Number:CaltechAUTHORS:20221215-431170800.2
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:118384
Deposited By: Research Services Depository
Deposited On:19 Jan 2023 18:25
Last Modified:19 Jan 2023 18:27

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