J Lissenberg, Cardiff University
Andrew M. McCaig, University of Leeds
Susan Q. Lang, Department of Geology and Geophysics, Woods Hole Oceanographic Institution, 266 Woods Hole Road, Woods Hole, MA, 02543, USA
Peter Blum, Texas A&M University
Natsue Abe, Japan Agency for Marine-Earth Science and Technology
William J. Brazelton, University of Utah
Rémi Coltan, Geosciences Department, Ecole Normale Supérieure; Paris
Jeremy R Deans, School of Biological, Environmental, and Earth Sciences, University of Southern Mississippi
Kristin L Dickerson, Department of Earth and Planetary Sciences, University of California
Marguerite Godard, Université de Montpellier
Barbara E. John, University of Wyoming
Frieder Klein, Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution
Rebecca Kuehn, Institute of Geosciences and Geography, Martin-Luther-University Halle-Wittenberg
Kuan-Yu Lin, Department of Earth Sciences, University of Delaware
Haiyang Liu, Center of Deep Sea Research, Institute of Oceanology, Chinese Academy of Sciences
Ethan Lopes, Department of Geophysics, Stanford University
Toshi Nozaka, Department of Earth Sciences, Okayama University
Andrew Parsons, School of Geography, Earth and Environmental Sciences
Vamdev Pathak, Department of Geology, Central University of Punjab
Mark Reagan, Department of Earth and Environmental Sciences, University of Iowa
Jordyn Robare, School of Molecular Sciences, Arizona State University
Ivan Savov, School of Earth and Environment, University of Leeds
Esther M. Schwarzenbach, Department of Geosciences, University of Fribourg
Olivier J. Sissmann, IFP Energies Nouvelles; Paris
Gordon Southam, School of the Environment, The University of Queensland
Fengping Wang, School of Oceanography, Shanghai Jiao Tong University, Shanghai
C. Geoffrey Wheat, Global Undersea Research Unit, University of Alaska Fairbanks
Lesley Anderson, Arctic Research Support and Logistics, Washington DC
Sarah Treadwell, Department of Communication, University of North Dakota and Blue Marble Space Institute of Science

ORCID

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.

DOI

10.1126/science.adp1058

Publication Date

2024-08-08

Publication Title

Science

Volume

385

Issue

6709

ISSN

0036-8075

Creative Commons License

Creative Commons Attribution 4.0 International License
This work is licensed under a Creative Commons Attribution 4.0 International License.

First Page

623

Last Page

629

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