A long section of serpentinized depleted mantle peridotite

• DOI: 10.1126/science.adp1058
• Publication Date: 2024-08-08T18:06:46Z
• Authors: C. Johan Lissenberg; Andrew M. McCaig; Susan Q. Lang; Peter Blum; Natsue Abe; William J. Brazelton; Rémi Coltat; Jeremy R. Deans; Kristin L. Dickerson; Marguerite Godard; Barbara E. John; Frieder Klein; Rebecca Kuehn; Kuan-Yu Lin; Haiyang Liu; Ethan L. Lopes; Toshio Nozaka; Andrew J. Parsons; Vamdev Pathak; Mark K. Reagan; Jordyn A. Robare; Ivan P. Savov; Esther M. Schwarz...; Olivier J. Sissmann; Gordon Southam; Fengping Wang; C. Geoffrey Wheat; Lesley Anderson; Sarah Treadwell
• Keywords: Peridotite

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