Le Geotop - Quoi de neuf au Geotop? What's up at Geotop?

Quoi de neuf au Geotop? What's up at Geotop?

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Dr. Alain Tremblay (Geotop-UQAM)

20,000 Leagues under the Seas – an ophiolitic journey

Mercredi 23 mai 2018 à midi / Wednesday, May 23, 2018, 12:00 pm

McGill U., Dep. of Earth and Planetary Science, 3450 rue Université, room FDA 232

Résumé / Abstract :

Ophiolites can be used to study «with dry feet» the formation of the oceanic lithosphere and orogenic accretionary processes. The geological mapping of ophiolites thus furnishes direct observations of the oceanic crust, which then benefit the interpretation of deep drilling, bathymetric, and geophysical data gathered in modern oceans. The main ophiolitic massifs currently known on Earth cover a time period from the Proterozoic to the Actual, and represent the remnants of ancient oceans (i.e. Iapetus, Tethys) or oceans that are currently disappearing (i.e. Pacific), which permit the analysis of secular structural variations of oceans. These are the themes that will be discussed with examples from the Appalachians, the Dinarides and the Canadian Cordillera.