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  • (1) Crise énergétique et tectonique des plaques
    Jacques Bourgois Université Pierre et Marie Curie - Paris 6Institut des Sciences de la Terre Paris (iSTeP) - UMR 7193 UPMC-CNRS Case 124Tour 46-00, 2 ème étage4, place Jussieu75252 Paris Cedex 5 - France--------Tel: 01 44 27 52 08Email: jacques.bourgois@upmc.fr...
  • (2) Meeting the explosion in electricity demand
    Jacques Bourgois Université Pierre et Marie Curie - Paris 6 Institut des Sciences de la Terre Paris (iSTeP) - UMR 7193 UPMC-CNRS Case 124 Tour 46-00, 2 ème étage 4, place Jussieu 75252 Paris Cedex 5 - France -------- Tel: 01 44 27 52 08 Email: jacques.bourgois@upmc.fr...
  • (3) Feedback coupling between tectonics and climate
    BRIEF DESCRIPTION OF ONGOING ACADEMIC RESEARCH Since about ten years, part of my studies focused at the interface of tectonics, oceanography, and climatology. The main objective is to understand the feedback processes between climate and tectonic deformation...
  • (4) CV de Jacques Bourgois
    CV de Jacques Bourgois Né le 08-08-1944, marié deux enfants, Service militaire effectué. DR1 CNRS depuis 1989. Entré au CNRS en 1971. Adresse: Université Pierre et Marie Curie - Paris 6 Institut des Sciences de la Terre Paris (iSTeP) - UMR 7193 UPMC-CNRS...
  • (5) Le processus de subduction
    APPORTS A LA COMPREHENSION DU PROCESSUS DE SUBDUCTION Un condensé des travaux conduits depuis les années 80 Jacques Bourgois DR1 CNRS Septembre 2008 Motivations des études La subduction est un processus associé à la disparition de surface terrestre. Au...
  • (6) Le processus de subduction (suite)
    8- Point triple ride-fosse-fosse du Chili, subduction de dorsale, les adakites (Geology, 1997) En 1991, nous engagions une série d’opération pour étudier le point triple du Chili, seul endroit ou une dorsale océanique active entre activement en subduction....
  • (7) Liste des publications de Jacques Bourgois
    REVUES INTERNATIONALES (68) Voir liste des revues dans "article CV de Jacques Bourgois" (68) Bourgois, J., Cisternas, M.E., Braucher, R., Bourles, D., Frutos, J., 2016, Geomorphic records along the General Carrera (Chile)-Buenos Aires (Argentina) glacial...
  • (8) Liste des publications de Jacques Bourgois (suite)
    Liste des publications (suite) Autres contributions VIDEO : « Des cailloux et des hommes » (campagnes de plongées du Nautile, Chef de mission JB) durée 53 mn diffusée a la BBC, en Belgique et au Danemark. ARTICLE AU "NOUVEL OBSERVATEUR", 1991, « VOYAGE...
  • (9) EDITOR OF INTERNATIONAL JOURNAL OF GEOSCIENCES
    From : Dr. Jacques Bourgois to : potential contributors Since September 2011 , I am co-editor in Chief (together with a Chinese colleague, Prof. Shuanggen Jin, Shanghai Astronomical Observatory, CAS, China ) of " INTERNATIONAL JOURNAL OF GEOSCIENCES "...
  • (10) CV Jacques Bourgois in English
    Emeritus Geologist Université Pierre et Marie Curie, Paris 6, Institut des Sciences de la Terre Paris (iSTeP) UMR 7193 UPMC-CNRS 4, place Jussieu Tour 46-00, 3ème étage, Case 124 75252 Paris Cedex 5 - France 33 (0)1 44 27 59 98 jacques.bourgois@upmc.fr...

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16 septembre 2008 2 16 /09 /septembre /2008 12:19
BRIEF DESCRIPTION OF ONGOING ACADEMIC RESEARCH


Since about ten years, part of my studies focused at the interface of tectonics, oceanography, and climatology. The main objective is to understand the feedback processes between climate and tectonic deformation at the time scale of the glacial-interglacial cycle. Abrupt changes in the climate system induce tectonic responses including at the millennium time scale. To document these changes, to date them precisely and to understand the mechanisms require to use technique of analytical chemistry including 10Be cosmogenic isotopes.
Over the past ten years, my main contributions are related to the following topics:
(1) At the Chile triple junction area (Bourgois et al., 2000), the climate-induced variation of the sediment supply to the trench axis is the main factor controlling the continental margin tectonic regime. During the warm period of the interglacial episode at 117-130,000 years, rapid increase of the trench sediment accumulation caused the margin to switch from subduction-erosion or nonaccretion to subduction-accretion.
(2) Along the northwestern Peru forearc area (Bourgois et al., 2007), we infer that eustacy exerts important feedback coupling to seismic behavior of the Northern Peru subduction zone. We speculate that during sea level fall, pore-fluid pressure diminishes along the subduction channel inducing a possible seaward migration of the locked zone reaching a maximum by the end of the eustatic low stand at 19-23,000 years.
(3) At the Chile triple junction area (Bourgois et al., in progress), the major retreat of the northern Patagonia ice cap at 11-14,000 years controls the tectonic rebound of this segment of the Andes, and the funneling of the Andean runoff to the Pacific.


Selected references

(56) Bourgois, J., Bigot-Cormier, F., Bourles, D., Braucher, R., Dauteuil, O., Witt, C., Michaud, F., northwestern Peru coastal plain, and continental slope during the past 200 kyr. Journal of Geophysical Research, 112, B04104, doi:10.1029/2006JB004491.

(42) Bourgois, J., Guivel, C., Lagabrielle, Y., Calmus, T., Boulègue, J., Daux, V., 2000 Glacial-interglacial trench supply variation, spreading-ridge subduction, and feedback controls on the Andean margin development at the Chile triple junction area (45-48° S), Journal of Geophysical Research, 105, 8355-8386.

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