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Carbon-isotope stratigraphy of Cenomanian-Turonian platform carbonates from the Southern Apennines (Italy); a chemostratigraphic approach to the problem of correlation between shallow-water and deep-water successions

Mariano Parente, Gianluca Frijia and Matteo Di Lucia
Carbon-isotope stratigraphy of Cenomanian-Turonian platform carbonates from the Southern Apennines (Italy); a chemostratigraphic approach to the problem of correlation between shallow-water and deep-water successions
Journal of the Geological Society of London (May 2007) 164 (3): 609-620

Abstract

The carbon-isotope record of three sections of shallow-water carbonates from the Upper Cretaceous sequences of the southern Apennines (Italy) shows a pronounced positive excursion of about 4-5 per mil. Using the upper Cenomanian Cisalveolina fraasi level as a biostratigraphic tie-point we correlate this excursion to the OAE-2 isotopic event. Comparison with the standard reference delta (super 13) C curve of Eastbourne (England) shows that the overall character of the excursion is clearly reproduced in the shallow-water curves. Chemostratigraphic correlation allows definition of the age of some important shallow-water biostratigraphic events to the precision of an ammonite zone, using the well-established bio-chronostratigraphic framework defined in the Eastbourne section. The onset of the Cenomanian-Turonian isotopic excursion coincides with a transgressive trend, recorded by the occurrence of more open-marine facies and culminating with an incipient drowning in one of the sections studied. Our data suggest that the open-ocean isotopic signal is most faithfully recorded and preserved in shallow-water platform carbonates during transgressive periods, when the effects of meteoric diagenesis and seawater ageing are less severe.


ISSN: 0016-7649
EISSN: 2041-479X
Coden: JGSLAS
Serial Title: Journal of the Geological Society of London
Serial Volume: 164
Serial Issue: 3
Title: Carbon-isotope stratigraphy of Cenomanian-Turonian platform carbonates from the Southern Apennines (Italy); a chemostratigraphic approach to the problem of correlation between shallow-water and deep-water successions
Affiliation: Universita "Federico II", Dipartimento di Scienze della Terra, Naples, Italy
Pages: 609-620
Published: 200705
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 103
Accession Number: 2007-062060
Categories: Stratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: charts, geol. sketch map
N40°00'00" - N41°19'60", E14°00'00" - E16°00'00"
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 200732
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