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Balcony

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BALancing Craton thickness by self-cOmpression, graiN size evolution and viscous...

BALancing Craton thickness by self-cOmpression, graiN size evolution and viscous anisotropY Cratons, the oldest lithosphere on Earth, have survived for more than 3 billion years due to their neutral buoyancy, high viscosity, and thickness. The geologic record shows that, in the presence of external agents (e.g., mantle p... ver más

31/05/2026

Innovasjon Norge

211K€

Presupuesto del proyecto: 211K€

Líder del proyecto

Innovasjon Norge No se ha especificado una descripción o un objeto social para esta compañía.

Financiación concedida El organismo HORIZON EUROPE notifico la concesión del proyecto el día 2023-04-27

Línea de financiación objetivo El proyecto se financió a través de la siguiente ayuda:

HORIZON-MSCA-2022-PF-01-01: MSCA Postdoctoral Fellowships 2022

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Innovasjon Norge

210.91K€ | Lider

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Últimas noticias

29-11-2024: IDAE En las últimas 48 horas el Organismo IDAE ha otorgado 4 concesiones

29-11-2024: ECE En las últimas 48 horas el Organismo ECE ha otorgado 2 concesiones

29-11-2024: CMVAMADRID En las últimas 48 horas el Organismo CMVAMADRID ha otorgado 37 concesiones

Duración del proyecto: 37 meses Fecha Inicio: 2023-04-27
Fecha Fin: 2026-05-31

Líder del proyecto

Innovasjon Norge

Presupuesto del proyecto 211K€

Descripción del proyecto Cratons, the oldest lithosphere on Earth, have survived for more than 3 billion years due to their neutral buoyancy, high viscosity, and thickness. The geologic record shows that, in the presence of external agents (e.g., mantle plume eruptions), most cratons have experienced partial destruction (e.g., Slave craton). Yet, cratons have retained their 200-300 km thickness more or less to the present-day. We hypothesize that a newly-identified self-compressive mechanism causes them to slowly but continuously regrow with time, promoting re-cratonization. Convective self-compression results from the diversion of mantle flow beneath thick and viscous cratonic roots, and is clearly observed and analysed in our recent numerical models. There may be temporary periods of imbalance if craton destruction is relatively new and self-compression has not had enough time to act (e.g., North China craton). Over time, self-compressive thickening may be balanced by increased shearing at the base of cratons due viscous anisotropy and grain size-dependent weakening. In this MSCA project BALCONY, I will use numerical models of cratons sitting above a convecting mantle to investigate how craton thickness may be maintained for billion years by the self-compression mechanism, despite destabilizing events and continuous erosion from below. My objectives are to develop time-dependent numerical models to investigate (1) the effect of self-compression on craton re-thickening, (2) the importance of viscous anisotropy and grain size evolution for craton thinning, and finally (3) the balance between thickening and thinning, which ultimately determines the long-term thickness of cratons. The project is a perfect overlap between the research interests of the supervisors (Clint Conrad, Agnes Kiraly at the Universtiy of Oslo) and myself. We are all interested in understanding lithosphere dynamics and have previous experience modelling craton stability, viscous anisotropy and grain size evolution.

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