Japan Geoscience Union Meeting 2014

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International Session (Oral)

Symbol B (Biogeosciences) » B-PT Paleontology

[B-PT02_1PM1] Biocalcification and the Geochemistry of Proxies

Thu. May 1, 2014 2:15 PM - 3:45 PM 421 (4F)

Convener:*Takashi Toyofuku(Institute of Biogeosciences (BioGeos), Japan Agency for Marine-Earth Science and Technology), Hiroshi Kitazato(Institute of Biogeosciences (BioGeos),Japan Agency for Marine-Earth Science and Technology (JAMSTEC)), Jelle Bijma(Alfred-Wegener-Institut fur Polar- und Meeresforschung), Chair:Takashi Toyofuku(Institute of Biogeosciences (BioGeos), Japan Agency for Marine-Earth Science and Technology)

In order to reconstruct the Earth climate system, marine paleoclimatologists resort to transfer functions or geochemical proxies, which are produced or affected by organisms. The relationships used for reconstructions are generally based on field calibrations or derived from laboratory experiments. The danger of these so called empirical relationships is that they maybe valid only within the restricted parameter space of their calibration. Application of proxy relationships to very different environmental settings (e.g. high vs. low latitude or glacial vs. interglacial) requires a mechanistic understanding of these relationships. Much progress can be expected by a better understanding of the biocalcification mechanisms and the incorporation of proxy signals.In this session we invite contributions related to the biocalcification, calibration and validation of marine proxies.

2:15 PM - 2:30 PM

[BPT02-14] Skeletal isotope compositions of Acropora coral primary polyps experimentally cultured at different temperatures

*Kozue NISHIDA1, Kei ISHIKAWA2, Akira IGUCHI3, Yasuaki TANAKA4, Mizuho SATO1, Mayuri INOUE5, Takashi NAKAMURA2, Kazuhiko SAKAI4, Atsushi SUZUKI1 (1.Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST), 2.Faculty of Science, University of Ryukyus, 3.Department of Bioresources Engineering, Okinawa National College of Technology, 4.Sesoko Station, Tropical Biosphere Research Center, University of the Ryukyus, 5.Atmosphere and Ocean Research Institute, The University of Tokyo)

3:00 PM - 3:15 PM

[BPT02-17] Benthic Foraminifera from the deep-water Niger delta (Gulf of Guinea): Assessing acitivity of hydrate pockmark

*Christophe FONTANIER1, Karolina KOHO2, M. GONI-URRIZA3, B. DEFLANDRE4, S. GALAUP5, A. IVANOVSKY4, N. GAYET6, B. DENNIELOU7, A. GREMARE4, S. BICHON3, P. ANSCHUTZ4, R. DURAN3, G.-j. REICHART8, N. SULTAN7 (1.IFREMER/Universite de Nantes/Angers/Le Mans, 2.Faculty of Geosciences, Utrecht University, 3.Universite de Pau et des Pays de l'Adour, 4.Universite de Bordeaux, 5.Ecole d'ingenieurs en Environnement, Georessources et Ingenierie du Developpement durable,, 6.IFREMER, Laboratoire Environnements Profonds, 7.IFREMER, Laboratoire Environnements sedimentaires, 8.Royal Netherlands Institute for Sea Research)