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 (Friday, 4th week, Michaelmas 2023)
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