Enrichments in Hg,Cd, As,and Sb in recent sediments of Azores-Iceland Ridge |
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| Authors: | F Grousset O Donard |
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| Institution: | (1) Laboratoire Associe au C.N.R.S. n° 197-Université Bordeaux I, 351 Crs. de la Libération, 33405 Talence Cedex, France;(2) Département de Géologie et Océanographie, Université Bordeaux I, 351 Crs. de la Libération, 33405 Talence Cedex, France;(3) Present address: Department of Chemistry, University of New Hampshire, 03824 Durham, NH |
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| Abstract: | Mercury, cadmium, arsenic, and antimony were analyzed in cores sampled on the Azores-Iceland Ridge. High values of 780  g · kg–1 for Hg, 1.7 g · g–1 for Cd, 87 g · g–1 for As, and 8.1 g · g–1 for Sb occur in the rift valley and transform faults. These enrichments, strictly linked to the ridge, could not have an allochtonous origin. A local hydrogenous flux may explain this phenomenon. These metallic enrichments may be connected to a hydrothermal activity extended between 43° N and 47° N. |
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