MASE

Modelling the Archaean Subduction Environment

Coordinatore	UNIVERSITY OF DURHAM    more Spiacenti, non ci sono informazioni su questo coordinatore. Contattare Fabio per maggiori infomrazioni, grazie.
Nazionalità Coordinatore	United Kingdom [UK]
Totale costo	1˙490˙738 €
EC contributo	1˙490˙738 €
Programma	FP7-IDEAS-ERC Specific programme: "Ideas" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013)
Code Call	ERC-2011-StG_20101014
Funding Scheme	ERC-SG
Anno di inizio	2012
Periodo (anno-mese-giorno)	2012-01-01   -   2016-12-31

 Partecipanti

#	participant	country	role	EC contrib. [€]
1	UNIVERSITE JEAN MONNET SAINT ETIENNE  Organization address address: RUE FRANCIS BAULIER 34 city: SAINT ETIENNE CEDEX 2 postcode: 42023 contact info Titolo: Ms. Nome: Odile Cognome: Barou Email: send email Telefono: +33 4 69 66 11 27	FR (SAINT ETIENNE CEDEX 2)	beneficiary	47˙235.02
2	UNIVERSITY OF DURHAM  Organization address address: STOCKTON ROAD THE PALATINE CENTRE city: DURHAM postcode: DH1 3LE contact info Titolo: Dr. Nome: Jeroen Cognome: Van Hunen Email: send email Telefono: +44 1913342293 Fax: +44 191 3342301	UK (DURHAM)	hostInstitution	1˙443˙503.00
3	UNIVERSITY OF DURHAM  Organization address address: STOCKTON ROAD THE PALATINE CENTRE city: DURHAM postcode: DH1 3LE contact info Titolo: Ms. Nome: Wendy Cognome: Harle Email: send email Telefono: +44 191 3344635 Fax: +44 191 3344634	UK (DURHAM)	hostInstitution	1˙443˙503.00

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 Obiettivo del progetto (Objective)

'Today, subduction dominates the Earth’s appearance: it drives plate tectonics, and plays a dominant role in continental crust formation. If and how subduction operated 2.5-4 billion years ago, in the Archaean, is debated, primarily on the basis of the sparse Archaean geological record. It seems likely that some form of subduction occurred at least by the late Archaean, but may well have looked different from today’s. A proper understanding of this Archaean ‘subduction’ is essential, since so many processes are likely to depend on it.

Observations of the geological (mostly isotope-geochemical) record have provided an invaluable window to peer into the Archaean world. But inferred Archaean geodynamics from these observations are non-unique. Various models fit the same data within uncertainty, and often lack a firm physical basis. To overcome these shortcomings, I propose a novel, forward approach of predicting synthetic geochemical fingerprints from numerical, geodynamically consistent physical models, and comparing those with geochemical observations. This will be used to constrain and better understand the two most pressing questions in Earth sciences: How did plate tectonics evolve, and how did continents form? In particular, this project aims to: 1) assess quantitatively the geodynamical and geochemical viability of intermittent plate tectonics; 2) test the various proposed models for the formation of Archaean continental crust; Comparison of calculated synthetic geochemistry (e.g. Re-Os data, rare-Earth element data) from geodynamical models with available datasets will provide powerful diagnostics to distinguish viable models.

In addition, this work will also directly relevant for the evolution of the Earth’s surface, and to the differences with the other terrestrial planets. Finally, there are potential economic benefits, since the world’s largest mineral deposits (e.g. gold) occur in Archaean terrains and have been associated to subduction.'