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Testing solid earth climate connections through mid ocean ridge time series

A central problem of understanding the Earth system is quantifying climate-solid Earth feedback that requires time-series studies. One important time series is the climate (sea level) record that shows transitions between ice ages... ver más

30/09/2029

HELMHOLTZZENTRUM F...

14M€

Presupuesto del proyecto: 14M€

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HELMHOLTZZENTRUM FUR OZEANFORSCHUNG KIEL GEOM... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

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Financiación concedida El organismo HORIZON EUROPE notifico la concesión del proyecto el día 2023-03-16

ERC-2022-SyG: ERC Synergy Grants Objective:Objectives

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3 Participantes

HELMHOLTZZENTRUM FUR OZEANFO...

11.48M€ | Lider

HARVARD GLOBAL RESEARCH AND...

HARVARD GLOBAL

2.51M€ | Participante

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Duración del proyecto: 78 meses Fecha Inicio: 2023-03-16
Fecha Fin: 2029-09-30

Líder del proyecto

HELMHOLTZZENTRUM FUR OZEANFORSCHUNG KIEL GEOM... No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 14M€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto A central problem of understanding the Earth system is quantifying climate-solid Earth feedback that requires time-series studies. One important time series is the climate (sea level) record that shows transitions between ice ages and warm periods for the last millions of years, involving vast mass transfer between continents (ice load) and oceans. Volcanism is sensitive to such pressure changes, but its response to glacial cycles is largely unknown for the global mid-ocean-ridge (MOR) system, where 80% of Earth’s volcanism occurs. Models of MOR response to sealevel fluctuations predict changes in crustal thickness, chemistry of lavas and hydrothermal activity. Establishing high-resolution time series on MORs, however, has previously not been possible, because the sea floor is rapidly covered by sediment as it moves away from the MOR and thus cannot be directly sampled. Recent studies, however, show MOR eruptions deposit samples of lava as glass on nearby sediments for up to 100 ka. These carbonate-rich sediments can be precisely dated by oxygen isotope stratigraphy and provide an archive of ridge eruptions (glasses) and hydrothermal activity (trace metals) in the sediments that can be sampled by gravity coring. Through closely spaced new cores to be retrieved during multiple research cruises, a high-resolution time series of volcanism and hydrothermal activity can be achieved and directly linked to the climate record, whereas seismic techniques can be used to determine variations in crustal thickness over time. We propose to obtain integrated data sets for all these processes from slow, intermediate and fast spreading ridge segments over the past 1.5 Ma in unprecedented detail. The results of these glass, sediment and crustal thickness time series will allow us to unequivocally test the influence of glacial cycles on MOR processes and will provide the first high-resolution time series of ocean ridge magmatism, opening up a new frontier of scientific exploration.

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