Multi-isotopic (Fe-Cu-Zn) constraints on the magmato-hydrothermal history during mantle exhumation at slow-spreading centers

13 At slow to ultraslow-spreading ridges, tectonic mantle exhumation and magmatic processes accounts 14 for heterogeneity in the lithosphere and drives deep hydrothermal circulation and fluids venting at the 15 seafloor. However, the spatio-temporal evolution and the interplay between magmatic and hydrothermal 16 processes during mantle exhumation, as well as their consequences for chemical exchange at mid-ocean 17 ridges are poorly constrained. 18 We carried out a Fe, Cu and Zn isotope study of mantle rocks drilled at the Mid-Atlantic Ridge Kane 19 (MARK) area (23’30°N) to decipher the consequences of magmatic versus hydrothermal chemical 20 exchange on lithospheric mantle composition. At MARK, mantle rocks undergo complex melt-rock 21 interaction during melt percolation overprinted by high temperature (HT, >350°C) hydrothermal 22 circulation that leads to the formation of secondary mineral assemblages (e.g., amphibole, chlorite, 23

• Publication year

  2025

• Venue

  Geochimica et Cosmochimica Acta

• Publication date

  2025-01-01

• Fields of study

  Not labeled

• Identifiers
  DOI 10.1016/j.gca.2024.11.013
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar

• No claims are published for this paper.

• No concepts are published for this paper.

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