Descriptif ED1112-MTP
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Encours
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""Dates: 9 Mai, 14 et 15 Mai 2012; Lieu : Salle outremer, IPGP, Cuvier.
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Dates prévues 14 et 15 Mai, Salle outremer, IPGP, Cuvier.
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Ce module est organisé sous la forme de jours de conférences_cours.
Ce module est organisé sous la forme de jours de conférences_cours.
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'''Investigating the Deep Earth: Observation, Experiments, and Models'''
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The deep Earth is not physically accessible, but it is however the object of intense studies by remote sensing (seismology, geoid, magnetism) and has left a measurable imprint on the shallow Earth (geochemistry, petrology).<br> In order to better understand the structure, composition, and evolution of the deep Earth, and to propose models of composition, formation and evolution, we need to compare the observations with laboratory-based experiments, and carry out what looks like a real "forensics" investigation.<br> We can give a few examples of some seminal achievements in this regard:<br> Francis Birch has shown 50 years ago that the core is necessarily lighter than pure iron. He achieved this by comparing seismic observation of velocity-density in the core with lab-based experiments on pure iron. <br>Similarly, Ted Ringwood has proposed that the mantle was composed of a synthetic rock called pyrolite, a mixture of olivine and pyroxenes. This again was obtained by linking the composition of MORB and mantle xenoliths to high-pressure phase equilibrium studies in the lab.<br> Last, the 410, 550, and 660 seismic discontinuities in the mantle were linked, one after the other, to physical changes in mantle minerals, namely olivine, at high pressure and high temperature. <br> The objective of this 3-day (1 day graduate, 2 day postgraduate) course is to highlight the different domains of investigation of the deep Earth (Seismology, Geochemistry, Experimental Petrology, Mineral Physics, Geodynamics), and to present the models that emerge from their interaction.
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James Badro (IPGP)<br>
James Badro (IPGP)<br>
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Investigating the Deep Earth: Observation, Experiments, and Models
 
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The deep Earth is not physically accessible, but it is however the object of intense studies by remote sensing (seismology, geoid, magnetism) and has left a measurable imprint on the shallow Earth (geochemistry, petrology). In order to better understand the structure, composition, and evolution of the deep Earth, and to propose models of composition, formation and evolution, we need to compare the observations with laboratory-based experiments, and carry out what looks like a real "forensics" investigation.<br> We can give a few examples of some seminal achievements in this regard: Francis Birch has shown 50 years ago that the core is necessarily lighter than pure iron. He achieved this by comparing seismic observation of velocity-density in the core with lab-based experiments on pure iron. <br>Similarly, Ted Ringwood has proposed that the mantle was composed of a synthetic rock called pyrolite, a mixture of olivine and pyroxenes. This again was obtained by linking the composition of MORB and mantle xenoliths to high-pressure phase equilibrium studies in the lab.<br> Last, the 410, 550, and 660 seismic discontinuities in the mantle were linked, one after the other, to physical changes in mantle minerals, namely olivine, at high pressure and high temperature. <br>The objective of this 3-day (1 day graduate, 2 day postgraduate) course is to highlight the different domains of investigation of the deep Earth (Seismology, Geochemistry, Experimental Petrology, Mineral Physics, Geodynamics), and to present the models that emerge from their interaction.
 
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Version du 14 décembre 2011 à 22:02

""Dates: 9 Mai, 14 et 15 Mai 2012; Lieu : Salle outremer, IPGP, Cuvier.

Ce module est organisé sous la forme de jours de conférences_cours.

Investigating the Deep Earth: Observation, Experiments, and Models

The deep Earth is not physically accessible, but it is however the object of intense studies by remote sensing (seismology, geoid, magnetism) and has left a measurable imprint on the shallow Earth (geochemistry, petrology).
In order to better understand the structure, composition, and evolution of the deep Earth, and to propose models of composition, formation and evolution, we need to compare the observations with laboratory-based experiments, and carry out what looks like a real "forensics" investigation.
We can give a few examples of some seminal achievements in this regard:
Francis Birch has shown 50 years ago that the core is necessarily lighter than pure iron. He achieved this by comparing seismic observation of velocity-density in the core with lab-based experiments on pure iron.
Similarly, Ted Ringwood has proposed that the mantle was composed of a synthetic rock called pyrolite, a mixture of olivine and pyroxenes. This again was obtained by linking the composition of MORB and mantle xenoliths to high-pressure phase equilibrium studies in the lab.
Last, the 410, 550, and 660 seismic discontinuities in the mantle were linked, one after the other, to physical changes in mantle minerals, namely olivine, at high pressure and high temperature.
The objective of this 3-day (1 day graduate, 2 day postgraduate) course is to highlight the different domains of investigation of the deep Earth (Seismology, Geochemistry, Experimental Petrology, Mineral Physics, Geodynamics), and to present the models that emerge from their interaction.


Les intervenants sont : Bernard Bourdon (ENS Lyon)
Razvan Caracas (ENS Lyon)
Stephane Labrosse (ENS Lyon)
Mike Walter (U. Bristol)
Lidunka Vocadlo (UCL London)
Ana Ferreira (UEA Norwich)
Julien Siebert (UPMC/IPGP)
James Badro (IPGP)



Pour les doctorants autres que les doctorants ED109: Merci de vous inscrire en indiquant votre nom, prénom, mail et le n° de votre École Doctorale à scol-ed@ipgp.fr

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