EMAS

Geochemical study of hydrated and dehydrated ultramafic rocks from the Cerro del Almirez (southern Spain): implications for element mobilization in subduction zones and the composition of arc magmas

Coordinatore	AGENCIA ESTATAL CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS    more  Organization address address: CALLE SERRANO 117 city: MADRID postcode: 28006 contact info Titolo: Mr. Nome: Eusebio Cognome: Jiménez-Arroyo Email: send email Telefono: +34 91 566 8852 Fax: +34 91 566 89 13
Nazionalità Coordinatore	Spain [ES]
Totale costo	45˙000 €
EC contributo	45˙000 €
Programma	FP7-PEOPLE Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	FP7-PEOPLE-2010-RG
Funding Scheme	MC-ERG
Anno di inizio	2011
Periodo (anno-mese-giorno)	2011-01-09   -   2014-01-08

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	AGENCIA ESTATAL CONSEJO SUPERIOR DE INVESTIGACIONES CIENTIFICAS  Organization address address: CALLE SERRANO 117 city: MADRID postcode: 28006 contact info Titolo: Mr. Nome: Eusebio Cognome: Jiménez-Arroyo Email: send email Telefono: +34 91 566 8852 Fax: +34 91 566 89 13	ES (MADRID)	coordinator	45˙000.00

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 Obiettivo del progetto (Objective)

'In subduction zones, chemical elements are transferred between different reservoirs of the Earth (i.e., the atmosphere, the hydrosphere, the lithosphere and the asthenosphere) and important amounts of magmas are generated. Reactions involving volatiles are fundamental in mobilizing elements in subduction zones and they significantly influence the composition of the associated arc magmas, which show a characteristic enrichment in Large-Ion Lithophile Elements relative to the High-Field Strength Elements. There is an increasing agreement that one of the most important reactions that generates fluids in subduction zones and triggers the arc magmatism is the dehydration of antigorite serpentinite to prograde chlorite harzburgite. Here, I propose to carry out a detailed geochemical study of the ultramafic rocks from the Cerro del Almirez (southern Spain), which is the only natural example worldwide preserving the high-pressure dehydration of antigorite-serpentinite into prograde peridotite. Major, trace element and radiogenic isotopic analyses of whole-rocks and minerals from samples located across the serpentinite-harzburgite transition will be performed. This study will provide new insight into how lithophile and siderophile elements behave during the dehydration of serpentinite, how they are transferred between the different components of the subduction zone and how they influence the composition of the slab-derived fluids and arc magmas. This project will contribute to the transfer of knowledge of cutting-edge techniques on isotope analysis and to increase the international leadership of the host in the geochemistry of subduction zones, concurrently strengthening its cooperation with internationally-reputed European centres in Earth Sciences. The award of this reintegration grant will permit to reinforce my personal skills in analytical and theoretical geochemistry and will be fundamental for obtaining a permanent position as a research scientist at the host.'