Understanding the role of impact cratering in Earth's evolution through state-of-the-art geochronology

Información del proyecto

Crater Chron

Identificador del acuerdo de subvención: 792030

DOI

10.3030/792030

Proyecto cerrado

Fecha de la firma de la CE 23 Marzo 2018

Fecha de inicio 1 Julio 2018

Fecha de finalización 28 Febrero 2021

Financiado con arreglo a

• EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions

Coste total

€ 173 857,20

Aportación de la UE

€ 173 857,20

Coordinado por

NATURHISTORISKA RIKSMUSEET
Sweden

Objetivo

The role of impact cratering in the evolution of Earth’s geosphere and biosphere is greatly underappreciated in the field of modern geoscience. Although years of research on terrestrial impact craters have contributed greatly to our knowledge of impact cratering processes and products, the available geochronological data represents a major and fundamental gap in our knowledge. Of the ca. 190 confirmed impact craters on Earth only ca. 10 % are considered to be accurately and precisely dated. Consequently, the vast majority of terrestrial craters cannot be correlated with each other or with other geological events such as mass extinctions. Here we propose to take timely advantage of recent advances both in our understanding of how the mineral zircon (ZrSiO4) can record the age of an impact event and in the analytical techniques used to determine such U-Pb ages to significantly and efficiently grow our database of accurately and precisely dated terrestrial impact craters. Specifically, this project will focus on craters whose precise formation age may have broad implications for Earth’s history. Among others, these include the Siljan impact crater, Sweden, which has been proposed as a contributing factor to the late Devonian mass extinction event, one of the largest mass extinctions in the Phanerozoic, and the Suavjärvi impact crater, northwest Russia. The latter has a very poorly constrained age of between 2.7 and 2.2 Ga but is likely to be the oldest impact crater on Earth with confirmation of an impact age in this study. This innovative action will couple recent advances in microstructural characterisation of shocked zircon (EBSD analysis and Raman mapping) with cutting-edge U-Pb analytical techniques not previously applied to shocked grains (including high resolution, fully quantitative U-Pb age mapping by SIMS and high precision multiple step leaching CA-ID-TIMS) and establish efficient protocols for future dating of craters on Earth and other planetary bodies.

Ámbito científico (EuroSciVoc)

• ciencias naturales › informática y ciencias de la información › base de datos
• ciencias naturales › ciencias de la tierra y ciencias ambientales conexas › geología › geocronología
• humanidades › historia y arqueología › historia
• ciencias agrícolas › agricultura, silvicultura y pesca › agricultura › granos y semillas oleoaginosas
• ciencias naturales › ciencias de la tierra y ciencias ambientales conexas › ciencias de la atmósfera › meteorología › biosfera

Programa(s)

• H2020-EU.1.3. - EXCELLENT SCIENCE - Marie Skłodowska-Curie Actions PROGRAMA PRINCIPAL
  
• H2020-EU.1.3.2. - Nurturing excellence by means of cross-border and cross-sector mobility
  

Tema(s)

• MSCA-IF-2017 - Individual Fellowships
  

Régimen de financiación

MSCA-IF-EF-ST - Standard EF

Convocatoria de propuestas

H2020-MSCA-IF-2017

Coordinador

NATURHISTORISKA RIKSMUSEET

• Aportación neta de la UEn: € 173 857,20
• Dirección: Frescativägen 40 ; SE 114 18 Stockholm ; Suecia
• Región: Östra Sverige › Stockholm › Stockholms län
• Tipo de actividad: Research Organisations
• Coste total: € 173 857,20