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
ISSN
0036-8075
Organisational Unit
School of Geography, Earth and Environmental Sciences
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Recommended Citation
Lissenberg, J., McCaig, A., Lang, S., Blum, P., Abe, N., Brazelton, W., Coltan, R., Deans, J., Dickerson, K., Godard, M., John, B., Klein, F., Kuehn, R., Lin, K., Liu, H., Lopes, E., Nozaka, T., Parsons, A., Pathak, V., Reagan, M., Robare, J., Savov, I., Schwarzenbach, E., Sissmann, O., Southam, G., Wang, F., Wheat, C., Anderson, L., & Treadwell, S. (2024) 'A long section of serpentinized depleted mantle peridotite', Science, . Available at: https://doi.org/10.1126/science.adp1058
