14 May, 2009 (16:00 GMT), 5 Merrion Square, Dublin 2.
Speaker: Dr. Piroska Lorinczi.
Title: Geodynamical Models of the formation of the Carpathian-Pannonian Region of Central and Eastern Europe.
Abstract:
As part of the Alpine orogenic system the Pannonian basin formed by extension of the crust and lithosphere between about 17 and 12 million years ago. The two major crustal blocks of the Pannonian basin, Alcapa (Alpine-Carpathian-Pannonian) and Tisza, underwent a complex process of rotation and extension of variable magnitude during the Tertiary. Opposite rotations of the two plates led to NW-SE convergence and NE-SW extension in the space between the two Intra-Carpathian terranes. We have constructed geodynamical models of the rotation and extension of the two Pannonian blocks. We aim to show, using 2D numerical models, how the two blocks deformed under the influence of a NW push by the Adriatic block, a NE pull from a retreating subduction zone on the eastern Carpathians, and the internal buoyancy forces arising from crustal thickness variations. Present-day tectonic activity in this region is concentrated underneath the southeastern part of the Carpathians, the Vrancea region. Strong earthquakes occur at intermediate depths beneath Vrancea in a narrow, nearly vertical source volume between about 70 and 200 km depth. This phenomenon is often attributed to subduction of oceanic lithosphere. However an alternative explanation to this deep seismicity is that downwelling of the continental mantle lithosphere is produced by gravitational instability. Three dimensional finite deformation models of the gravitational instability of the continental lithosphere, based on the finite element method, demonstrate that the Rayleigh Taylor mechanism can explain the present distribution of deformation within the downwelling lithosphere, both in terms of distribution of seismicity and amplitude of strain rates.
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Last Updated: 22nd March 2016 by Anna
2009-05-14 – SEMINAR by Dr. Piroska Lorinczi: Geodynamical Models of the formation of the Carpathian-Pannonian Region of Central and Eastern Europe
14 May, 2009 (16:00 GMT), 5 Merrion Square, Dublin 2.
Speaker: Dr. Piroska Lorinczi.
Title: Geodynamical Models of the formation of the Carpathian-Pannonian Region of Central and Eastern Europe.
Abstract:
As part of the Alpine orogenic system the Pannonian basin formed by extension of the crust and lithosphere between about 17 and 12 million years ago. The two major crustal blocks of the Pannonian basin, Alcapa (Alpine-Carpathian-Pannonian) and Tisza, underwent a complex process of rotation and extension of variable magnitude during the Tertiary. Opposite rotations of the two plates led to NW-SE convergence and NE-SW extension in the space between the two Intra-Carpathian terranes. We have constructed geodynamical models of the rotation and extension of the two Pannonian blocks. We aim to show, using 2D numerical models, how the two blocks deformed under the influence of a NW push by the Adriatic block, a NE pull from a retreating subduction zone on the eastern Carpathians, and the internal buoyancy forces arising from crustal thickness variations. Present-day tectonic activity in this region is concentrated underneath the southeastern part of the Carpathians, the Vrancea region. Strong earthquakes occur at intermediate depths beneath Vrancea in a narrow, nearly vertical source volume between about 70 and 200 km depth. This phenomenon is often attributed to subduction of oceanic lithosphere. However an alternative explanation to this deep seismicity is that downwelling of the continental mantle lithosphere is produced by gravitational instability. Three dimensional finite deformation models of the gravitational instability of the continental lithosphere, based on the finite element method, demonstrate that the Rayleigh Taylor mechanism can explain the present distribution of deformation within the downwelling lithosphere, both in terms of distribution of seismicity and amplitude of strain rates.
Category: Geophysics Section News & Events
Available to buy on the DIAS bookshop: books.dias.ie/index.php?main… (5/5) #DIASdiscovers #celtic #studies #twopatricks
"In the lives of St. Patrick, the two saints are invariably fused into one", said Prof. O'Rahilly in his lecture. The lecture was a condensation from O’Rahilly’s book “The two Patricks: a lecture on the history of Christianity in fifth-century Ireland”. (4/5)
He was known by his first name Patricius, which in later times would lead to confusion as he was succeeded by another apostle of the same name (Saint Patrick or Patricius in Latin). (3/5)
He spoke on "Palladius and Patrick". Palladius was the first bishop of the Christians of Ireland. (2/5)
Date: 21st March 1942 Paper: The Irish Press Headline: Palladius and Patrick | School Of Celtic Studies Lecture Synopsis: The first public lecture under the auspices of the School of Celtic Studies was delivered in Trinity College by Professor T. F. O'Rahilly in 1942. (1/5)
As part of our ongoing participation in the @HistFest we decided to take a look into the Irish Newspaper Archives and see where DIAS made it into print over the last 80 years. There were so many articles, the hardest part was selecting what we would post. We hope you enjoy!
@AReillyFailte @CultureNight @VisitDublin Thanks Antoinette! Glad you enjoyed 😊
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