globalchange  > 过去全球变化的重建
DOI: 10.1016/j.palaeo.2013.12.008
论文题名:
Lower Maastrichtian cyclostratigraphy of the Bidart section (Basque Country, SW France): A remarkable record of precessional forcing
作者: Husson D.; Thibault N.; Galbrun B.; Gardin S.; Minoletti F.; Sageman B.; Huret E.
刊名: Palaeogeography, Palaeoclimatology, Palaeoecology
ISSN: 0031-0182
出版年: 2014
卷: 395
起始页码: 176
结束页码: 197
语种: 英语
英文关键词: Carbon-isotope stratigraphy ; Cyclostratigraphy ; Maastrichtian ; Magnetic susceptibility ; Marl-limestone alternations ; Precession
英文摘要: Cyclostratigraphic analysis of the Maastrichtian limestone-marl alternations of Bidart (SW France) allows the hypothesis of orbital control on lithological cycles to be evaluated. Magnetic susceptibility (MS), oxygen and carbon isotope measurements, sampled at a high resolution, are analyzed using various cyclostratigraphic tools. A statistically significant orbital signal is detected, with a remarkable record of the precession corresponding to the limestone-marl couplets. This well expressed orbital forcing allows the building of a relative cyclostratigraphic time scale for the MS and δ13C records based on the 100kyr eccentricity cycle. The total duration of the section is estimated at 1.44±0.22Myr. Correlation based on calcareous nannofossil biostratigraphy and comparison of the scaled Bidart δ13C record to the astronomically calibrated δ13C signal of ODP Hole 762C shows that the studied section extends from -71.5 to -70Ma, covering the upper part of Chron C32n.1n and 2/3 of Chron C31r. Oxygen isotope data suggest a 2°C cooling of sea-surface temperatures during the studied interval. When placed on the long-term δ18O trend of the Bidart section, this interval is here recognized as the onset of the early Maastrichtian cooling event. With its excellent record of the precessional forcing, the Bidart section, along with other sections of the Basque Country, is a useful tool for the refinement of the Maastrichtian timescale. © 2013 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/69472
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作者单位: Department of Earth and Planetary Sciences, Technological Institute, 2145 Sheridan Road, Evanston, IL 60208-3130, United States; Sorbonne Universités, UPMC Univ Paris 06, UMR 7193, Institut des Sciences de la Terre Paris (iSTeP), F-75005 Paris, France; Institute for Geosciences and Natural Resource Management, University of Copenhagen, Øster Voldgade 10, DK-1350 Københavns K., Denmark; Sorbonne Universités, UPMC Univ Paris 06, UMR 7072, Centre de Recherche sur la Paléobiodiversité et les Paléoenvironnements, F-75005 Paris, France; Agence Nationale pour la Gestion des Déchets Radioactifs, 1/7 rue Jean Monnet, Parc de la Croix Blanche, 92298 Châtenay-Malabry Cedex, France

Recommended Citation:
Husson D.,Thibault N.,Galbrun B.,et al. Lower Maastrichtian cyclostratigraphy of the Bidart section (Basque Country, SW France): A remarkable record of precessional forcing[J]. Palaeogeography, Palaeoclimatology, Palaeoecology,2014-01-01,395
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