Julien Morin

Doctorant

photo de Julien Morin

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  1. Adresse
  2. Sujet de thèse: The Jurassic extension event in Central Asia : geodynamic context, paleotopographic consequences and links with the major Late Jurassic aridification phase.
  3. CV: Junior Geologist

Adresse

Equipe Paléo2D
Géosciences Rennes
Bât. 15, Pièce , campus Beaulieu
Université de Rennes 1
35042 RENNES cedex

Sujet de thèse: The Jurassic extension event in Central Asia : geodynamic context, paleotopographic consequences and links with the major Late Jurassic aridification phase.

Directeur de thèse: Marc Jolivet1
Collaborations: Cécile Robin1, Laurie Barrier2, Sylvie Bourquin1, Gloria Heilbronn3

1 Univ Rennes, CNRS, Géosciences Rennes, UMR 6118, CNRS – F-35000 Rennes, France.
2 Institut de Physique du Globe de Paris, Sorbonne Paris Cité, Université Paris Diderot, UMR 7154 CNRS, Paris, France.
3 CASP, West Building, Madingley Rise, Madingley Road, Cambridge, CB3 0UD, United Kingdom.

CONTEXTE ET OBJECTIFS:

L’évolution tectonique du Paléozoïque au Cénozoïque en Asie Centrale est majoritairement contrôlée par une série d’évènements d’accrétions de terrains et de blocs continentaux. L’amalgamation de la « CAOB » (Central Asian Orogenic Belt ; Sengör et al., 1993 ; Windeley et al., 2007) durant le Paléozoïque supérieur, l’accrétion Triassique-Jurassique inférieur des blocs Cimmériens (Roger et al., 2010) ainsi que la fermeture de l’océan Mogol-Okhotsk au Jurassique moyen – Crétacé inférieur (ex. Donskaya et al., 2013) ont instauré les grandes structures tectoniques du continent asiatique.

Le Jurassique est une période particulière dans l’histoire de l’Asie. En effet, mis à part la fermeture de l’océan Mongol-Okhotsk au Nord, le continent asiatique ne semble pas enregistrer d’autres grands évènements compressifs. A l’Ouest, une extension généralisée associée à de l’extension arrière-arc affecte, durant le Jurassique inférieur à moyen, une région s’étendant de la mer Caspienne au domaine Sud Kazakh (Zonenshain and Le Pichon, 1986 ; Thomas et al., 1999 ; Brunet et al., 2003). En Mongolie et en Chine du Nord, le Jurassique supérieur-Crétacé inférieur correspond également à une phase extensive induisant la formation de grabens et de cores complexes (ex. Daoudene et al., 2009; Ritts et al. 2010). La période Jurassique est également marquée par la mise en place d’une surface de planation d’échelle continentale (Jolivet et al., 2007 ; De Grave et al., 2007 ; Jolivet et al., 2010 ; Jolivet et al., 2013) ainsi que par une phase d’aridification majeure lors de la transition Jurassique - Crétacé (Hendrix et al., 1992 ; Jolivet et al., 2015).

En analysant différents bassins sédimentaires contenant des dépôts Jurassique – Crétacé nous voulons reconstituer l’évolution paléotopographique, paléogéographique et paléoclimatique de l’Asie Centrale au cours du Jurassique, ceci dans le but de comprendre son évolution tectonique ainsi que les relations cinématiques existantes entre la région du Tian Shan, le domaine de Turan à l’Ouest et la Mongolie-Sibérie à l’Est.

Références

Brunet, M.-F., Korotaev, M. V., Ershov, A. V., and Nishikin, A. M., 2003, The South Caspian Basin: a review of its evolution from subsidence modelling: Sedimentary Geology, v. 156, p. 119–148.
Daoudene, Y., Gapais, D., Ledru, P., Cocherie, A., Hocquet, S., and Donskaya, T. V., 2009, The Ereendavaa Range (north-eastern Mongolia): an additional argument for Mesozoic extension throughout eastern Asia. In: Xiao, W. J., Kröner, A. & Windley, B. (eds) Geodynamic Evolution of Central Asia in the Paleozoic and Mesozoic: International Journal of Earth Science. Springer-Verlag, Berlin, Heidelberg, v. 98, p. 1381–1393.
De Grave, J., Buslov, M. M., and Van den haute, P., 2007, Distant effects of India-Eurasia convergence and Mesozoic intracontinental deformation in Central Asia: Constraints from apatite fission-track thermochronology: Journal of Asian Earth Sciences, v. 29, p. 188-204.
Donskaya, T. V., Gladkochub, D. P., Mazukabzov, A. M., and Ivanov, A. V., 2013, Late Paleozoic-Mesozoic subduction-related magmatism at the southern margin of the Siberian continent and the 150 million-year history of the Mongol–Okhotsk Ocean: Journal of Asian Earth Sciences, v. 62, p. 79–97.
Hendrix, M. S., Graham, S. A., Carroll, A., Sobel, E., McKnight, C., Schulein, B. and Wang, Z., 1992, Sedimentary record and climatic implications of recurrent deformation in the Tian Shan: evidence from Mesozoic strata of the north Tarim, south Dzungar, and Turpan basin, northwest China:  Geological Society of America Bulletin, v. 104, p. 53–79.
Jolivet, M., Ritz, J. F., Vassallo, R., Larroque, C., Braucher, R., Todbileg, M., ... and Arzhanikova, A., 2007, Mongolian summits: an uplifted, flat, old but still preserved erosion surface: Geology, v. 35, no 10, p.  871-874.
Jolivet, M., Dominguez, S., Charreau, J., Chen, Y., Li, Y., and Wang, Q., 2010, Mesozoic and Cenozoic tectonic history of the Central Chinese Tian Shan: reactivated tectonic structures and active deformation: Tectonics, v. 29, TC 6019.
Jolivet, M., Arzhannikov, S., Arzhannikova, A., Chauvet, A., Vassallo, R., and Braucher, R., 2013, Geomorphic Mesozoic and Cenozoic evolution in the Oka–Jombolok region (East Sayan ranges, Siberia): Journal of Asian Earth Sciences, v. 62, p. 117-133.
Jolivet, M., Bourquin, S., Heilbronn, G., Robin, C., Barrier, L., Dabard, M. P., Jia, Y., De Pelsmaeker, E., and Fu, B., 2015, The Upper Jurassic–Lower Cretaceous alluvial-fan deposits of the Kalaza Formation (Central Asia): tectonic pulse or increased aridity?: Geological Society, London, Special Publications, v. 427, p. SP427. 6.
Ritts, B. D., Berry, A. K., Johnson, C. L., Darby, B. J., and Davis, G. A., 2010, Early Cretaceous supradetachment basins in the Hohhot metamorphic core complex, Inner Mongolia, China: Basin Research, v. 22, p. 45–60.
Roger, F., Jolivet, M., and Malavieille, J., 2010, The tectonic evolution of the Songpan-Garzê (North Tibet) and adjacent areas from Proterozoic to Present: A synthesis: Journal of Asian Earth Sciences, v. 39, p. 254-269.
Sengör, A.M.C., Natal'in, B.A. and Burtman, V.S., 1993, Evolution of the Altaid tectonic collage and Paleozoic crustal growth in Eurasia: Nature, v. 364, p. 299-307.
Thomas, J. C., Cobbold, P. R., Shein, V. S., and Le Douaran, S., 1999, Sedimentary record of late Paleozoic to Recent tectonism in central Asia – analysis of subsurface data from the Turan and south Kazak domains: Tectonophysics, v. 313, p. 243–263.
Windley, B. F., Alexeiev, D., Xiao, W., Kro¨ner, A. and Badarch, G., 2007, Tectonic models for accretion of the Central Asian Orogenic Belt: Journal of the Geological Society, London, v. 164, p. 31–47.
Zonenshain, L. P., and Le Pichon, X., 1986, Deep basins of the Black Sea and Caspian Sea as remnants of Mesozoic back-arc basins: Tectonophysics, v. 123, p. 181–211.

 

CV: Junior Geologist

EDUCATION

        2016 - 2019  PhD Thesis: The Jurassic extension event in Central Asia: Geodynamic context, paleotopographic
consequences and links with the major late Jurassic aridication phase, University of Rennes 1.
        
        2014 - 2016  Master’s degree in Geosciences, speciality in Petroleum and Mining ressources, University of Rennes 1.

        2011 - 2014  Bachelor of Science in Geosciences, University Joseph Fourier (Grenoble, France) with the third year abroad at the Universit of Calgary, Canada, via the TASSEP program
   
WORK EXPERIENCES

         January 2016 - July 2016: Professional internship (6 months) : TOTAL (R&D) and OSUR
                 - Post rift evolution and quantication of the terrigeneous budget at the scale of a continental margin:The South West African margin.

         July 2015 - August 2015: Professional internship (2 months) : DODIN CAMPENON BERNARD
                 - Geological analysis of the Brioverian Formation in the context of the construction of the metro (line B) in Rennes. Establishement of a geological model to understand and to prevent the potential risk of sinkhole formation during and subsequent to excavation.

         May 2015 - June 2015: Professional internship (2 months) : TOTAL (R&D) and OSUR
                 - Stratigraphical analysis of the Orange basin: Involvement on post-rift vertical movements.

SKILLS

          Field sedimentologist specialized in continental domains: description and characterization of km-scale sedimentary sections (Qaidam, Yarkand-Fergana, Tian Shan).
          Paleogeographic reconstructions: synthesis of sedimentological and geochronological data
          Basin analyses: Geological interpretation of well logs: Core description and analysis
                                    Seismic interpretation and seismic stratigraphy.
                                    Establishement of isopach maps and Time to Depth conversions.
                                    Assessement of sediment accumulation at the basin scale (South West African margin).
           Language: English: Advanced level (IELTS: 7,5 ; CLES level 2), French: Mother tongue

EXTRACURRICULAR ACTIVITIES

           Sport: Hiking, all sort of climbing (sport, ice-climbing, multi-pitch...), sailing