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Océaniques et Continentaux
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Séminaire


Corchia Cave speleothem records of glacial-interglacial climate beyond the limits of uranium-thorium dating

Date
January 23, 2018  2 pm

Lieu
Salle Univers, Bâtiment B18N, OASU, Université de Bordeaux

Intervenant(s)
Russell Neil Drysdale, University of Melbourne, Australie

Lien
https://findanexpert.unimelb.edu.au/display/person169478

Résumé
Speleothems are well-known, climate-sensitive archives that can be dated with relatively high precision. Recent developments in uranium-lead geochronology have opened up new opportunities to explore palaeoclimate during periods beyond the limits of traditional uranium-thorium dating (about 600 ka). In this context, speleothems from Corchia Cave (Italy) possess exceptional qualities - high uranium, high-purity calcite - for producing palaeoclimate records back beyond 1 million years. Combining stable isotopic data from these speleothems with high-resolution records from nearby ocean cores provides new insights into the Earth?s climate system through the Middle Pleistocene Transition.
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