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DOI10.1130/B32050.1
A 9 million-year-long astrochronological record of the early- middle Eocene corroborated by seafloor spreading rates
Francescone F.; Lauretano V.; Bouligand C.; Moretti M.; Sabatino N.; Schrader C.; Catanzariti R.; Hilgen F.; Lanci L.; Turtù A.; Sprovieri M.; Lourens L.; Galeotti S.
发表日期2018
ISSN167606
起始页码499
结束页码520
卷号131期号:2021-03-04
英文摘要The early-middle Eocene (ca. 56-41 Ma) is recorded in the pelagic Scaglia Rossa and Variegata Formations of the Umbria-Marche Basin (central Italy). Geochemical and magnetostratigraphic alignment between the Bottaccione section (Gubbio, central Italy) and the Smirra core (Cagli, central Italy) allows us to generate a continuous and wellpreserved new record that, combined with previously published data from the same area, creates a continuous high-resolution record from the Paleocene-Eocene thermal maximum (ca. 56 Ma) to the lower part of chron C21n. Comparison with carbon isotope records from Ocean Drilling Program Sites 1258 and 1263 reveals a satisfactory match, providing further evidence of the global significance of the long-term trend and superposed perturbations captured by the δ13C records. The identification of astronomically forced geochemical cycles allows us to develop a 405 k.y. tuned age model, thereby extending the astrochronology from ca. 56.0 to ca. 47.5 Ma. Marine magnetic anomaly profiles from major oceanic basins characterized by high seafloor spreading rates were used to independently test the astronomical polarity time scale associated with our tuning, as well as other polarity time scales. Our age model suggests the existence of periods of relatively constant seafloor spreading rates separated by rapid changes, while the other time scales generate more gradual variations and also include large and short-term deviations in spreading rates that occur simultaneously in different oceanic basins, implying errors in polarity reversal ages. The Umbria- Marche age model further contributes to the closure of the middle Eocene gap in the astronomical time scale. © 2018 Geological Society of America.
语种英语
来源期刊Bulletin of the Geological Society of America
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/185055
作者单位Dipartimento di Scienze Pure e Applicate, Università di Urbino, Campus Scientifico 'E. Mattei,', Urbino, 61029, Italy; School of Chemistry, University of Bristol, Cantock's Close, Bristol, BS8 1TS, United Kingdom; Université Grenoble Alpes, Université Savoie Mont Blanc, Centre National de Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD), Institut Français des Sciences et Technologies des Transports (IFSTTAR), et Institut des Sciences de la Terre (ISTerre), Grenoble, 38000, France; Istituto per l'Ambiente Marino Costiero, Consiglio Nazionale delle Ricerche (IAMC-CNR), Capo Granitola, Via del Mare 3, Campobello di Mazara (Tp), 91021, Italy; Department of Earth Sciences, Faculty of Geosciences, Utrecht University, Heidelberglaan 2, Utrecht, 3584 CS, Netherlands; Istituto di Geoscienze e Georisorse, Consiglio Nazionale delle Ricerche (CNR), Via G. Moruzzi 1, Pisa, 56124, Italy; Department of Earth and Life Sciences, Vrije Universiteit, De Boelelaan 1085, Amsterdam, 1081 HV, Net...
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Francescone F.,Lauretano V.,Bouligand C.,et al. A 9 million-year-long astrochronological record of the early- middle Eocene corroborated by seafloor spreading rates[J],2018,131(2021-03-04).
APA Francescone F..,Lauretano V..,Bouligand C..,Moretti M..,Sabatino N..,...&Galeotti S..(2018).A 9 million-year-long astrochronological record of the early- middle Eocene corroborated by seafloor spreading rates.Bulletin of the Geological Society of America,131(2021-03-04).
MLA Francescone F.,et al."A 9 million-year-long astrochronological record of the early- middle Eocene corroborated by seafloor spreading rates".Bulletin of the Geological Society of America 131.2021-03-04(2018).
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