RHEOMANTLE

Evaluation of mantle rheology in exhumed strike-slip faults

 Coordinatore UNIVERSITEIT UTRECHT 

 Organization address address: Heidelberglaan 8
city: UTRECHT
postcode: 3584 CS

contact info
Titolo: Dr.
Nome: Martijn
Cognome: Deenen
Email: send email
Telefono: 31302535169

 Nazionalità Coordinatore Netherlands [NL]
 Totale costo 259˙745 €
 EC contributo 259˙745 €
 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-2012-IOF
 Funding Scheme MC-IOF
 Anno di inizio 2014
 Periodo (anno-mese-giorno) 2014-01-01   -   2016-12-31

 Partecipanti

# participant  country  role  EC contrib. [€] 
1    UNIVERSITEIT UTRECHT

 Organization address address: Heidelberglaan 8
city: UTRECHT
postcode: 3584 CS

contact info
Titolo: Dr.
Nome: Martijn
Cognome: Deenen
Email: send email
Telefono: 31302535169

NL (UTRECHT) coordinator 259˙745.10

Mappa


 Word cloud

Esplora la "nuvola delle parole (Word Cloud) per avere un'idea di massima del progetto.

fault    dependent    slip    mantle    phases    crustal    strike    content    orientation    deformed    faults    zone    preferred    water    seismic    shear    rocks    strain    deformation    techniques    localization    zones    lie   

 Obiettivo del progetto (Objective)

'Crustal deformation, and associated seismic hazards, along active strike-slip faults are likely to be highly dependent on broad shear zones that occur within the uppermost mantle. The zones of localized mantle flow are physically continuous with crustal faults, and may control the bulk rheology of these systems. The main goal of this proposal is to characterize the rheological properties of naturally deformed mantle rocks and to provide insights into the control of mantle processes on deformation in lithospheric fault zones. We will utilize the mantle rocks exhumed in three major strike-slip fault shear zones (San Andreas Fault, US; Bogota Peninsula Shear Zone, New Caledonia; and Southern Pindos-Vourinos Shear Zone, Greece) as 'natural laboratories'. Through a powerful combination of conventional and emerging micro-analytical techniques, we will determine 1) microstructural relationships among constituent minerals, 2) shape preferred orientation of phases, 3) crystallographic preferred orientation using Electron Backscatter Diffraction (EBSD), 4) water content of major phases by means of Fourier Transform Infrared (FTIR) spectroscopy and nano Secondary Ion Mass Spectrometry (nanoSIMS) and 5) deviatoric stress through paleopiezometry. These methods will be used, in aggregate, to constrain the deformation mechanisms that promote weakening and strain localization in the upper mantle, with emphasis to the effect of water content and grain size reduction. Moreover, we will quantify viscosity and seismic anisotropy changes induced by strain localization in the mantle that can be used to refine interpretations of geophysical datasets. Finally, we will apply mathematic techniques (Lie groups and Lie algebras) to statistically characterize fabrics within deformed rocks, in order to recognize the presence of strain/fabric gradients, strain history, and strain-dependent deformation processes. Research will be carried out at the Universities of Wisconsin-Madison and Utrecht.'

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