360 F 30048671 zo6yATKHPV2qPQxEoqfbtDsRVpj9UNlK

facebooklinkedintwitter youtube
  • Séances, réunions, journées parrainées ou organisées par la SGF

    Séances, réunions, journées parrainées ou organisées par la SGF

Calendrier des évènements SGF

Séances, réunions, journées : le calendrier des manifestations scientifiques

La Société géologique de France organise et parraine chaque année des réunions scientifiques & techniques. Elle  annonce également les manifestations scientifiques organisées par ses associations partenaires, celles des institutions internationales auxquelles elle est liée, ainsi que les réunions des associations avec lesquelles elle a signé un protocole d'accord :

    Réunion/séance spécialisée de la SGF
    Parrainé par la SGF
    Organisée par une institution nationale ou internationale
    Organisée par une association partenaire à la SGF
    Manifestation où la SGF sera présente

 

Perigondwanian orogenies: from Variscan to Indosinian

Perigondwanian orogenies: from Variscan to Indosinian
Date : 16/06/2023
Date de fin : 16/06/2023
Heure : 09:00 à 17:30
Evénement co-organisé par la SGF
France
Perigondwanian orogenies: from Variscan to Indosinian
 
Institut des Scicences de la Terre d’Orléans Société géologique de France
Specialized session

 

  pdf Télécharger les informations et le programme : cliquer ici (mise à jour le 12/06/2023) (2.74 MB)

 

Scientific Background

Orogeny, witnessing of the activity of the Earth and documenting its evolution, is one of the key elements to understand how the Earth functions. For this reason, the study of mountain building is one of most ancient domains in geosciences. Among the well-known orogens, the perigondwanian ones that developed from the Neoproterozoic to Mesozoic gave rise to numerous belts such as Variscan, Indosinian, Cimmerian throughout Western Europe to Far East Asia are among the most important and studied ones.

The closure of the Rheic, Proto-Tethys, Central Asia, Paleo-Tethys Paleozoic oceans, accommodated oceanic subduction coeval with arc magmatism and back-arc basin opening, and mainly by the multiple collisions between Gondwana, Laurussia, Tarim, North China, South China, and Mongolia built up the Variscan, Central Asian Orogenic Belt, Tianshan, Kunlun Qinling-Qilian, Jinsha-Ailaoshan-Song Ma, and several other Asian belts, lead to the formation of the biggest landmass of Eurasian continent.

Their large spatial continuity and temporal distribution offer good opportunities to understand the Earth paleogeographic evolution, mechanisms of mountain building and geodynamic evolution. Therefore, these belts have attracted a great attention of the geoscientific community for more than one century.

In the last decades, fundamental understanding of the orogenic mechanisms has been achieved especially by multidisciplinary efforts through several important national research programs and international scientific collaborations. Major fundamental advances have been realized on the mechanisms of the lithosphere and paleogeographic evolution by the study of the tectonic events along these orogenic belts and their adjacent blocks.

However, numerous essential questions remain unanswered or hotly debated, such as the mechanisms of continental subduction and exhumation associated to multiple collisions between Gondwana, Laurussia and intervening microcontinents, the place of the Variscan belt in the Alpine-Himalayan basement, the development of oroclinal bending, the geodynamic evolution of Jinshajiang-Ailaoshan-Song Ma belt along the Indosinian orogenic belt, the closure time of the ancient Asian oceans such as Paleo-Asian, Proto-Tethys, the link between collision and development of intracontinental orogens, the role of intracontinental lithosphere delamination, and asthenospheric upwelling in magma genesis, the processes controlling the formation of large size ore deposits. The further studies in these domains will enhance fundamental understandings on the links of orogenesis with basin formation, metamorphism, magmatism, mantle convection, relief evolution, hydrothermal fluid circulation, and mineralization.

In order to exchange new results obtained from different disciplines, and in honor of his scientific contribution to the understanding of orogenesis during the last 40 years done by Michel Faure, the “Institut des Sciences de la Terre d’Orléans”, associated with the Société Géologique de France will organize an international conference on “Perigondwanian orogenies: from Variscan to Indosinian”. This meeting will provide the opportunity for geoscientists from numerous countries to discuss up-dated geological understanding, to establish new research objectives in this domain, and to reinforce international collaborations.

The meeting language will be English.

 

Scientific Committee (in alphabetical order):

Jacques Charvet, Yan Chen, Stéphane Guillot, Jean-Marc Lardeaux, Caroline Martel, Jérémie Mellton, Lionel Mercury, Manuel Moreira, Hugues Raimbourg, Bruno Scaillet, Karel Schulmann

 

Organizing Committee (in alphabetical order):

Yan Chen, Olivier Gaudefroy, Fabienne Gentillet, Caroline Martel, Lionel Mercury, Manuel Moreira, Nathalie Rolland, Nathalie Rouchon, Marie-France Rouillier

 

Date:

JUNE 16, 2023

 

Contacts and Correspondences:

Mme. M.-F. Rouillier (Marie-France Rouillier@cnrs.fr)

M. Y. Chen (Yan.Chen@univ-orleans.fr) ISTO-Campus Géosciences

Université d’Orléans 1A, rue de la Férrollerie

45067 ORLEANS Cedex 02

France

 

Website: http://web.cnrs-orleans.fr/osuc/isto/ Phone: 33-2-38 41 72 06 or 33-2-38 25 53 96

Fax: 00-33-2-38 63 64 88