Obiettivo Alteration of ocean crust is a fundamental on-going geological process. High-temperature alteration of the ocean crust occurs at the ridge, while diffusive, low temperature alteration is present off-ridge. Both alteration processes produce secondary minerals and change the primary chemical and isotopic signal of the oceanic crust. These signals can be brought into the mantle as altered oceanic crust enters a subduction zone and produces mantle inhomogeneities. As molybdenum is low in abundance in the mantle, but high in abundance in seawater with a distinct isotopic signal from each other, it is a promising element to study these processes. Prior to study deep cycling of molybdenum via ocean island basalts, detailed understanding of the behavior of molybdenum during alteration is needed. In this framework, we propose a study to identify the major molybdenum-bearing phase as well as the processes influencing the molybdenum isotope signal of the altered oceanic crust. Two cross-sections through the oceanic crust will be studied for this purpose, ODP Site 1256 and Macquarie Island (14 Ma and 7 Ma old, respectively). In-situ molybdenum concentrations and whole rock molybdenum isotope measurements are planned to understand on- and off-ridge alteration in the oceanic plate. This research will be groundbreaking, using molybdenum as a novel tracer to better constrain the behavior of on-/off-ridge alterations and to quantify the Mo-isotopic composition of the oceanic crust potentially entering the subduction zone. Campo scientifico natural scienceschemical sciencesinorganic chemistrytransition metalsnatural sciencesearth and related environmental sciencesgeologyseismologyplate tectonics Programma(i) FP7-PEOPLE - Specific programme "People" implementing the Seventh Framework Programme of the European Community for research, technological development and demonstration activities (2007 to 2013) Argomento(i) FP7-PEOPLE-2009-IEF - Marie Curie Action: "Intra-European Fellowships for Career Development" Invito a presentare proposte FP7-PEOPLE-2009-IEF Vedi altri progetti per questo bando Meccanismo di finanziamento MC-IEF - Intra-European Fellowships (IEF) Coordinatore UNIVERSITY OF BRISTOL Contributo UE € 172 240,80 Indirizzo BEACON HOUSE QUEENS ROAD BS8 1QU Bristol Regno Unito Mostra sulla mappa Regione South West (England) Gloucestershire, Wiltshire and Bristol/Bath area Bristol, City of Tipo di attività Higher or Secondary Education Establishments Contatto amministrativo Johanna Rule (Ms.) Collegamenti Contatta l’organizzazione Opens in new window Sito web Opens in new window Costo totale Nessun dato