Authors

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.

Publication Date

2024-08-09

Publication Title

Science

Volume

385

Issue

6709

ISSN

0036-8075

Acceptance Date

2024-06-18

Deposit Date

2024-07-22

Funding

This research used samples and data provided by the International Ocean Discovery Program (IODP). Funding for the operation and management of the scientific drilling vessel JOIDES Resolution was provided by the US National Science Foundation (NSF) (award OCE, 1326927). Funding to join Expedition 399 was provided by UK Natural Environment Research Council (grants NE/X019098/1 to C.J.L., NE/Y001737/1 to A.M.M., NE/Y002350/1 to A.J.P., and NE/Y002415/1 to I.P.S.); NSF (grant OCE, 1450528) for the US Science Support Program Office associated with the International Ocean Discovery Program [USSSP-IODP subcontract 22O(GG009393-04) to S.Q.L., M.K.R., J.R.D., F.K., B.E.J., E.L.L., W.J.B., K.L.D., C.G.W., J.A.R., and K.-Y.L.], Juan de la Cierva fellowship (FJC2021-047190-I to R.C.) funded by the Spanish Ministerio de Ciencia e Innovación and the Agencia Estatal de Investigación (MCIN/AEI/10.13039/501100011033); IODP France (to R.C., O.J.S., to M.G.); IFPEN (project XBT01 to O.J.S.); ANR Institut National des Sciences de l’Univers-CNRS (grant ANR-22-EXOR-0001 Origins to M.G.); National Natural Science Foundation of China (grant 42373003 to H.L.); Japan Society for the Promotion of Science (grant KAKENHI 23K03528 to T.N.), Australia New Zealand International Consortium (ANZIC) IODP (to G.S.); IODP-China Office and Natural Science Foundation of China (grant 92251303 to F.W.); IODP Germany (to R.K.), J-DESC (Japan Drilling Earth Science Consortium to N.A.), and National Centre for Polar and Ocean Research, Ministry of Earth Sciences, Government of India (to V.P.).

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

Additional Files

Tables_revision.xlsx (580 kB)

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