13 June, 2008 (16:00 GMT), 5 Merrion Square, Dublin 2.
Speaker: John O’Conner (VU University Amsterdam)
Title: Testing a new hotspot-plume model for the Hawaiian-Emperor Chain.
Abstract:
Although fixed hotspots and mantle plumes have been fundamental hypotheses in marine geosciences for more than 30 years, both are now being widely disputed. Whether or not mantle plumes form hotspots and their associated volcanic trails, the fixity of such mantle upwellings, and the depth(s) and composition(s) of their sources are of pivotal importance for geodynamic models of the mantle and the motions of tectonic plates. Volcanic propagation along seamount chains, most notably the archetypal Hawaiian-Emperor Chain with its Great Bend, is the key observation underpinning the notion that tectonic plates drift over fixed hotspots/plumes. But, we are proposing a different model for the Hawaiian-Emperor Chain on the basis of isotopic ages for new volcano samples and information about mantle flow inferred from diverse geophysical sources. I will talk about our new model for the Hawaiian-Emperor Chain and projects planned for testing its validity on a significantly more global scale. Understanding what these new data might mean will continue to depend critically on inferring fundamental information about the mantle from tomography, numerical modeling, plate reconstructions and possibly also the timing of major global environmental and biotic changes.
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Last Updated: 22nd March 2016 by Anna
2008-06-13 – SEMINAR by John O’Conner: Testing a new hotspot-plume model for the Hawaiian-Emperor Chain
13 June, 2008 (16:00 GMT), 5 Merrion Square, Dublin 2.
Speaker: John O’Conner (VU University Amsterdam)
Title: Testing a new hotspot-plume model for the Hawaiian-Emperor Chain.
Abstract:
Although fixed hotspots and mantle plumes have been fundamental hypotheses in marine geosciences for more than 30 years, both are now being widely disputed. Whether or not mantle plumes form hotspots and their associated volcanic trails, the fixity of such mantle upwellings, and the depth(s) and composition(s) of their sources are of pivotal importance for geodynamic models of the mantle and the motions of tectonic plates. Volcanic propagation along seamount chains, most notably the archetypal Hawaiian-Emperor Chain with its Great Bend, is the key observation underpinning the notion that tectonic plates drift over fixed hotspots/plumes. But, we are proposing a different model for the Hawaiian-Emperor Chain on the basis of isotopic ages for new volcano samples and information about mantle flow inferred from diverse geophysical sources. I will talk about our new model for the Hawaiian-Emperor Chain and projects planned for testing its validity on a significantly more global scale. Understanding what these new data might mean will continue to depend critically on inferring fundamental information about the mantle from tomography, numerical modeling, plate reconstructions and possibly also the timing of major global environmental and biotic changes.
Category: Geophysics Section News & Events
Big thank you to @MartinaPQuinn of @helloalicepr for moderating the discussion, and of course to our panel @NeasaMcG @CormacORafferty and @laoneill111
@CormacORafferty "to cut yourself off from fundamental research means you could miss out on some of the biggest ideas"
@laoneill "it's our job as researchers to keep reminding governments how important basic research is" "For Dev basic research being carried out in Ireland was a badge of pride"
@NeasaMcG Schrödinger's work in causality was not well received by the religious authorities at the time At the same time DIAS did have Catholic priests working on research projects in the early days, so there was not the conflict you might think between science and religion
@laoneill111 Schrödinger was very popular in social circles in Dublin, a bit of a renaissance man
@CormacORafferty Schrödinger was gifted at explaining difficult concepts
@CormacORafferty on how unsuccessful work, in Schrödinger's case, unified field theory, is just as important part of science. And no one has managed to crack it yet! And not forgetting the cat
@laoneill111 how Schrödinger's book inspired scientists to change fields and result in the finding of the double helix.
@NeasaMcG explaining how DIAS came about and how Schrödinger was attracted to Ireland #DIASdiscovers
Panel Discussion getting underway! @laoneill111 @CormacORafferty @NeasaMcG @MartinaPQuinn
We're half way through the documentary... Join us for the rest and the fascinating discussion to follow DM for link
@Stella15882 @NeasaMcG @HistFest @lukeoneil47 @CormacORafferty @MartinaPQuinn Stella, send me an email. I'll get a link to you communications@dias.ie
Starting in just over an hour we have limited tickets left for tonights broadcast and panel discussion. Get your free ticket now twitter.com/DIAS_Dublin/st…
Culture Night 2020 Booking Links! - Virtual Tour of DIAS Dunsink Observatory: eventbrite.ie/e/118043576515 - Earthquakes and other Geohazards: eventbrite.ie/e/earthquakes-… - Taifeadaí Cartlainne ó Scoil an Léinn Cheiltigh: eventbrite.ie/e/taifeadai-ca… Join us from 5pm! #CultureNight2020
@dias_geophysics have developed something special for @galway2020 in collaboration with composer David Stalling. It is an audio-visual composition “Palace of Ships,” based on sounds, images and seismic data from DIAS’ @SEA_SEIS Expeditions. More: dias.ie/2020/09/14/dia…
Meet some of our panelists for tomorrows discussion on the impact and legacy of the work carried out by Erwin Schroedinger during his time in Ireland as our first Director of Theoretical Physics Grab a free ticket here: eventbrite.ie/e/115984908985