A long section of serpentinized depleted mantle peridotite

Lissenberg, C. Johan ORCID: https://orcid.org/0000-0001-7774-2297, McCaig, Andrew M., Lang, Susan Q., Blum, Peter, Abe, Natsue, Brazelton, William J., Coltat, Rémi, Deans, Jeremy R., Dickerson, Kristin L., Godard, Marguerite, John, Barbara E., Klein, Frieder, Kuehn, Rebecca, Lin, Kuan-Yu, Liu, Haiyang, Lopes, Ethan L., Nozaka, Toshio, Parsons, Andrew J., Pathak, Vamdev, Reagan, Mark K., Robare, Jordyn A., Savov, Ivan P., Schwarzenbach, Esther M., Sissmann, Olivier J., Southam, Gordon, Wang, Fengping, Wheat, C. Geoffrey, Anderson, Lesley and Treadwell, Sarah 2024. A long section of serpentinized depleted mantle peridotite. Science 385 (6709) , pp. 623-629. 10.1126/science.adp1058

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Abstract

The upper mantle is critical for our understanding of terrestrial magmatism, crust formation, and element cycling between Earth’s solid interior, hydrosphere, atmosphere, and biosphere. Mantle composition and evolution have been primarily inferred by surface sampling and indirect methods. We recovered a long (1268-meter) section of serpentinized abyssal mantle peridotite interleaved with thin gabbroic intrusions. We find depleted compositions with notable variations in mantle mineralogy controlled by melt flow. Dunite zones have predominantly intermediate dips, in contrast to the originally steep mantle fabrics, indicative of oblique melt transport. Extensive hydrothermal fluid-rock interaction is recorded across the full depth of the core and is overprinted by oxidation in the upper 200 meters. Alteration patterns are consistent with vent fluid composition in the nearby Lost City hydrothermal field.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Earth and Environmental Sciences
Publisher:	American Association for the Advancement of Science
ISSN:	0036-8075
Date of First Compliant Deposit:	28 February 2025
Date of Acceptance:	18 June 2024
Last Modified:	03 Mar 2025 12:15
URI:	https://orca.cardiff.ac.uk/id/eprint/176546

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