Multiproxy Cretaceous-Paleogene boundary event stratigraphy: An Umbria-Marche basinwide perspective

Matthias Sinnesael, Alessandro Montanari, Fabrizio Frontalini, Rodolfo Coccioni, Jerome Gattacceca, Christophe Snoeck, Wenke Wegner, Christian Koeberl, Leah E. Morgan, Niels De Winter, Donald J. DePaolo, Philippe Claeys

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Samenvatting

The complete and well-studied pelagic carbonate successions from the Umbria-
Marche basin (Italy) permit the study of the event-rich stratigraphic interval around the Cretaceous-Paleogene boundary (e.g., Deccan volcanism, boundary impact, Paleocene recovery, and climate). To test the robustness of various proxy records (bulk carbonate δ13C, δ18O, 87Sr/86Sr, and Ca, Fe, Sr, and Mn concentrations) inside the Umbria-Marche basin, several stratigraphically equivalent sections were investigated (Bottaccione Gorge, Contessa Highway, Fornaci East quarry, Frontale, Morello, and Petriccio core). Besides the classical Gubbio sections of Bottaccione and Contessa, the new Morello section is put forward as an alternative location for this stratigraphic interval because it is less altered by burial diagenesis. Elemental profi les (Ca, Fe, Sr, Mn) acquired by handheld X-ray fluorescence (pXRF) efficiently provide regional chemostratigraphic and paleoenvironmental information. The Deccan volcanism, the Cretaceous-Paleogene boundary, the characteristic pattern of the Sr/Ca profi le across the boundary driven by the extinction and recovery of coccolithophores, and the Dan-C2 hyperthermal event are examples of such recorded paleoenvironmental events. Moreover, cyclostratigraphic analyses of proxies of detrital input (magnetic susceptibility and Fe concentrations) show the imprint in the sedimentary record of a 2.4 m.y. eccentricity minimum around 66.45–66.25 Ma, and suggest that the occurrence of theDan-C2 hyperthermal event was astronomically paced.
Originele taal-2English
Titel250 Million Years of Earth History in Central Italy: Celebrating 25 Years of the Geological Observatory of Coldigioco
RedacteurenChristian Koeberl, David Bice
Plaats van productieDenver
UitgeverijGeological Society of America
Hoofdstuk7
Aantal pagina's26
Volume542
ISBN van elektronische versie9780813795423
StatusPublished - 2019

Publicatie series

NaamGeological Society of America Special Papers
UitgeverijGeological Society of America
Volume542

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