2 December, 2009 (16:00 GMT), 5 Merrion Square, Dublin 2.
Speaker: Rob Evans, Woods Hole Oceanographic Institution, USA.
Title: Magnetotellurics at Subduction Zones: Constraints on Water Inputs and Melt Outputs.
Abstract:
Subduction zones occur where one tectonic plate is pushed below another, either continental or oceanic, and plunges deep into the mantle. The results of this process include substantial volcanism and large earthquakes, making subduction settings probably the most hazardous on Earth. Known unknowns on the process include: the fluxes of water into the system, which plays a critical role in triggering melting of the mantle; the amounts and distribution of melt in the mantle above the downgoing slab; and the delivery of melt to the volcanic, and in some oceanic collisional cases, back-arc spreading center. The Magnetotelluric (MT) method, which measures mantle electrical conductivity, is known to be sensitive to the presence of fluids such as water and melt. I will discuss the role of MT in subduction zone studies ongoing and upcoming. This discussion will include results from a seafloor survey across the Marianas trench and arc, some preliminary land MT work across the Cascadia system in the Northwestern US, and an overview of an upcoming experiment offshore Nicaragua and Costa Rica.
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Last Updated: 22nd March 2016 by Anna
2009-12-02 – SEMINAR by Rob Evans: Magnetotellurics at Subduction Zones: Constraints on Water Inputs and Melt Outputs
2 December, 2009 (16:00 GMT), 5 Merrion Square, Dublin 2.
Speaker: Rob Evans, Woods Hole Oceanographic Institution, USA.
Title: Magnetotellurics at Subduction Zones: Constraints on Water Inputs and Melt Outputs.
Abstract:
Subduction zones occur where one tectonic plate is pushed below another, either continental or oceanic, and plunges deep into the mantle. The results of this process include substantial volcanism and large earthquakes, making subduction settings probably the most hazardous on Earth. Known unknowns on the process include: the fluxes of water into the system, which plays a critical role in triggering melting of the mantle; the amounts and distribution of melt in the mantle above the downgoing slab; and the delivery of melt to the volcanic, and in some oceanic collisional cases, back-arc spreading center. The Magnetotelluric (MT) method, which measures mantle electrical conductivity, is known to be sensitive to the presence of fluids such as water and melt. I will discuss the role of MT in subduction zone studies ongoing and upcoming. This discussion will include results from a seafloor survey across the Marianas trench and arc, some preliminary land MT work across the Cascadia system in the Northwestern US, and an overview of an upcoming experiment offshore Nicaragua and Costa Rica.
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