POLLEN RECORDS AND CLIMATOSTRATIGRAPHY: A POWERFULTOOL FOR SHORT-TO LONG-DISTANCE CORRELATIONS OFCENOZOIC DEPOSITS

• Main Authors: Suc, Jean-Pierre, Popescu, Speranta-Maria, Bessedik, Mostefa, Jiménez-Moreno, Gonzalo, Zheng, Zhuo, Rubino, Jean-Loup, Le Gouche, Chloé, Salpin, Marie, Schnyder, Johann, Robin, Cécile
• Other Authors: Institut des Sciences de la Terre de Paris (iSTeP), Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS), GeoBioStratData.Consulting, Laboratory of Stratigraphic Paleontology & Paleoenvironment, University of Oran Es-Senia Oran, Departamento de Estratigrafia y paleontologia, Université de grenade, School of Earth Science and Geological Engineering Guangzhou, Sun Yat-sen University Guangzhou (SYSU), TOTAL S.A., TOTAL FINA ELF, Géosciences Rennes (GR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire des Sciences de l'Univers de Rennes (OSUR), Université de Rennes (UR)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Rennes 2 (UR2)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE)-Centre National de la Recherche Scientifique (CNRS)
• Format: Conference Object
• Language: English
• Published: HAL CCSD 2017
• Subjects: [SDU.STU.ST]Sciences of the Universe [physics]/Earth Sciences/Stratigraphy; [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology; Arctic; Arctic Ocean
• Online Access: https://insu.hal.science/insu-01718220

International audience Palynology contributes for long to stratigraphy, based on presence-absence of plant taxa (i.e., families,genera or species), a method severely thwarted by longitudinal and mainly latitudinal-altitudinal distributionof plants.Following pollen analysis applied to late Quaternary deposits, so successful not only for climatereconstructions but also for short-to long-distance stratigraphic correlations, we developed a similar approachfor the whole Cenozoic thanks to actual botanical identification of pollen grains based on their complete andrigorous morphological examination. Usually, identifications are provided at the genus level considering thatmost of the modern genera existed since the early Paleocene.The age of each studied exposed or drilled section is first determined using worldwide biostratigraphicmarkers (planktonic foraminifers, calcareous nannofossils, dinoflagellate cysts for marine sediments;micromammals for lacustrine deposits) and paleomagnetism. Then, pollen countings allow establishingdiagrams in which pollen percentages and/or ratios express the climate evolution and match with referenceoxygen isotopic curves. In such a frame, it is possible to identify similar and parallel climatic changes that maybe reliably correlated. Illustrative examples are shown from the European and Mediterranean Pliocene andMiocene and from Paleocene and Eocene from the Arctic Ocean, i.e. from the icehouse and greenhouse worlds,respectively.Finally, this Russian doll-like process, with biostratigraphic datation followed by climatostratigraphiccorrelations, may result in the astronomical deciphering of the most favourable sections. Such stratigraphicstudies were supported by Total since 1970.