Les spinelles de fer et de fer-zinc trouves dans des trappes a sediments amarrees pres d'events hydrothermaux oceanique.

Abstract

Fe- and Fe/Zn-spinels found in sediment traps moored near active hydrothermal vents located on the East Pacific Rise at 13oN are described. Their chemical composition differs from that of spinels from eruptive rocks, chimney walls and pelagic sediments (Mn nodules), particularly in their Zn content (ZnO 0-33.1%; mean value 5.43%), and is explained by high-T reactions occurring in the oceanic crust.-R.A.H.SCOPUS: ar.jinfo:eu-repo/semantics/publishe