http://www.cnr.it/ontology/cnr/individuo/prodotto/ID203485
Boron isotope evidence for shallow fluid transfer across subduction zones by serpentinized mantle (Articolo in rivista)
- Type
- Label
- Boron isotope evidence for shallow fluid transfer across subduction zones by serpentinized mantle (Articolo in rivista) (literal)
- Anno
- 2012-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1130/G33233.1 (literal)
- Alternative label
Scambelluri M. [1]; Tonarini S. [2] (2012)
Boron isotope evidence for shallow fluid transfer across subduction zones by serpentinized mantle
in Geology (Boulder Colo.); Geological Society Of America, Inc., Boulder (Stati Uniti d'America)
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- Scambelluri M. [1]; Tonarini S. [2] (literal)
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- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- [1] Dipartimento di Scienza della Terra, Ambiente e Vita, University of Genova, Corso Europa 26, 16132 Genoa, Italy
[2] CNR, IGG - Istituto di geoscienze e georisorse, Pisa (literal)
- Titolo
- Boron isotope evidence for shallow fluid transfer across subduction zones by serpentinized mantle (literal)
- Abstract
- Serpentinites formed by alteration of oceanic and forearc mantle are major volatile and fluid-mobile element reservoirs for arc magmatism, though direct proof of their dominance in the subduction-zone volatile cycles has been elusive. Boron isotopes are established markers of fluid-mediated mass transfer during subduction. Altered oceanic crust and sediments have been shown to release in the subarc mantle 11B-depleted fluids, which cannot explain 11B enrichment of many arcs. In contrast to these crustal reservoirs, we document high ?11B values retained in subduction-zone Alpine serpentinites. No 11B fractionation occurs in these rocks with progressive burial: the released 11B-rich fl uids uniquely explain the elevated ?11B of arc magmas. B, O-H, and Sr isotope systems indicate that serpentinization was driven by slab fl uids that infi ltrated the slab-mantle interface early in the subduction history. (literal)
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