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Does the silicate Earth have a leaky bottom? - Research seminar with Prof Tim Elliott
Geodynamic models have long modelled plumes originating from the bottom of the mantle. From this perspective, hot-spot magmatism provides a sample of the deepest mantle and potentially might carry evidence of on-going chemical exchange from core to mantle. Implicating protracted core-mantle interaction from the geochemistry of hot-spot magmas has been a sporadically popular notion over the last fifty years. In the last decade, unradiogenic values of 182W/184W have been reported in some hot-spot lavas, which provides perhaps the most convincing evidence of leakage from core to mantle. In this talk, I will assess this idea against alternative theories to account for unradiogenic 182W/184W in oceanic basalts and explore its implications for the longer term evolution of the mantle.
Date:
3 November 2023, 12:00
Venue:
Department of Earth Sciences, South Parks Road OX1 3AN
Venue Details:
Lecture Theatre
Speaker:
Prof Tim Elliott (University of Bristol)
Organising department:
Department of Earth Sciences
Part of:
Earth Sciences departmental seminars
Booking required?:
Not required
Booking url:
https://www.earth.ox.ac.uk/events/week-4-research-seminar-with-prof-tim-elliott/
Audience:
Members of the University only
Editor:
Maria Petrunova
