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FINGER-PT

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FINGERprinting cold subduction and Plate Tectonics using key minerals

Plate Tectonics (PT) is a well-established framework of moving plates made of oceanic and continental lithosphere. The main driving force of this system is the slab pull, a force imposed as the older and colder subducting plate si... ver más

30/04/2029

UNIVERSIDADE DE CO...

2M€

Presupuesto del proyecto: 2M€

Líder del proyecto

UNIVERSIDADE DE COIMBRA No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo HORIZON EUROPE notifico la concesión del proyecto el día 2023-11-03

ERC-2023-STG: ERC STARTING GRANTS Scope:Objectives

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1 Participantes

UNIVERSIDADE DE COIMBRA

2.50M€ | Lider

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Duración del proyecto: 65 meses Fecha Inicio: 2023-11-03
Fecha Fin: 2029-04-30

Líder del proyecto

UNIVERSIDADE DE COIMBRA No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 2M€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto Plate Tectonics (PT) is a well-established framework of moving plates made of oceanic and continental lithosphere. The main driving force of this system is the slab pull, a force imposed as the older and colder subducting plate sinks into the asthenosphere at convergent boundaries, producing Low Temperature/High Pressure (LT-HP) metamorphic rocks. Although our understanding about PT has improved in the last decades, there are major unknowns remaining, namely when and how its onset took place, a highly controversial topic. The record of LT-HP metamorphic rocks becomes continuous only from 850-750 Ma onwards, but recent evidence of these rocks at 2100-2000 Ma suggests a similar Tectonic regime operated at this time as well. An outstanding question arises: did Plate Tectonics, as we know it today, begin to operate only 850Ma ago or did this change take place much earlier but disappeared as the result of a preservation bias affecting LT/HP rocks? FINGER-PT will test this hypothesis using detrital minerals in sedimentary rocks that can track older LT-HP. Key minerals that can retain pressure, temperature, and age (P-T-t) information will be used, applying chronothermobarometric tools. Through a multidisciplinary approach, we will (i) combine the existing tools with new ones to obtain reliable P-T-t conditions; ii) test these tools and study the survival of eroded LT-HP terranes via mineral analyses in analogue modern sediments draining an exposed subduction zone; iii) identify and sample the most appropriate units, whose detrital minerals record the last 1000 to 4000 Ma, to trace the secular evolution of cold subduction. The emerging new tools from FINGER-PT, some that push current technological boundaries, will be widely applied by other petrologists. Establishing when modern-day PT began will influence the geodynamic mechanisms proposed for the early Earth (e.g. sluggish tectonics), forcing a shift of current conceptual models on the evolution of Earth systems.

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