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Unravelling the first Babbles of the Earth Inner Core History

Project description

Checking Earth’s magnetic mystery

For nearly a century, the timing of the inception of Earth’s inner core has fuelled scientific debate, influencing the perceived longevity of our magnetic shield crucial for sustaining life. Recent challenges to the established timeline add complexity to this enigma, necessitating a closer examination. In this context, the ERC-funded UBEICH project aims to revolutionise our understanding of Earth’s inner core evolution. Using an innovative multispecimen–single crystal palaeointensity approach, UBEICH seeks to extract elusive magnetic signals, offering unprecedented insights into deep Earth history and potentially unlocking the secrets of habitability across the cosmos. With far-reaching implications for Earth and beyond, UBEICH’s findings may contribute to solving the mysteries of habitability on exoplanets, particularly super-Earths.

Objective

The existence of Earth's inner core was a major discovery almost a century ago, and since then the timing of its nucleation remains highly debated. This major event in the Earths history enhanced the energy necessary to maintain the magnetic field to the present-day, making our planet habitable. Earth has thus escaped the fate of planets like Mars that lost its protective shield. While the community agreed to place the inner core formation at ~600 million years ago in the Ediacaran Period, new evidence of a change in the Earths magnetic field regime during the Mid-Paleozoic (416332 Ma) challenge this hypothesis: Can we better constrain the Earth inner core history? UBEICH will tackle this issue with a new kind of experimental data describing the long-term evolution of the Earths dynamo strength. In paleomagnetism, the conventional approaches fail to retrieve ancient magnetic signal from old rocks due to their weathering along their complex geological history. To this end, I will develop a promising but challenging multispecimen-single crystal paleointensity. This pioneering approach can significantly increase the number of observations by extracting the magnetic signal from the protected nanometric magnetic inclusion in silicate crystals with the multispecimen technique developed for other purposes. By providing challenging-to-obtain but theoretically reliable data, UBEICH has the ambition to bring a new light on the deep Earth history between 1.1 and 0.3 billion years by unravelling the inner core nucleation. Far-reaching implications beyond the Earths evolution and the origin of the magnetic field are expected, with new clues about the planetary core evolution of all rocky planets to understand the relationships between thermal evolution, dynamo, and planet habitability. This is of paramount importance at a time where amateur astronomers and scientists are discovering many new exoplanets, and especially super-Earth located in the Habitable Zone of their star.

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Topic(s)

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HORIZON-ERC - HORIZON ERC Grants

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Call for proposal

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(opens in new window) ERC-2023-STG

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Host institution

UNIVERSITE DE MONTPELLIER
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 1 633 404,00
Address
163 RUE AUGUSTE BROUSSONNET
34090 Montpellier
France

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Region
Occitanie Languedoc-Roussillon Hérault
Activity type
Higher or Secondary Education Establishments
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Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

€ 1 633 404,00

Beneficiaries (1)

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