Upper Campanian-Maastrichtian nannofossil biostratigraphy and high-resolution carbon-isotope stratigraphy of the Danish Basin; towards a standard δ13C curve for the Boreal Realm

Online Access: Get full text
doi: 10.1016/j.cretres.2011.09.001
Author(s): Thibault, Nicolas; Harlou, Rikke; Schovsbo, Niels; Schioler, Poul; Minoletti, Fabrice; Galbrun, Bruno; Lauridsen, Bodil W.; Sheldon, Emma; Stemmerik, Lars; Surlyk, Finn
Author Affiliation(s): Primary:
University of Copenhagen, Department of Geography and Geology, Copenhagen, Denmark
Geological Survey of Denmark and Greenland, Denmark
GNS Science, New Zealand
Université Pierre et Marie Curie Paris VI, France
Volume Title: Cretaceous Research
Source: Cretaceous Research, 33(1), p.72-90. Publisher: Elsevier, United Kingdom. ISSN: 0195-6671
Note: In English. Includes appendices. 101 refs.; illus., incl. 5 tables, sketch map
Summary: High-resolution carbon isotope stratigraphy of the upper Campanian-Maastrichtian is recorded in the Boreal Realm from a total of 1968 bulk chalk samples of the Stevns-1 core, eastern Denmark. Isotopic trends are calibrated by calcareous nannofossil bio-events and are correlated with a lower-resolution δ13C profile from Rordal, northwestern Denmark. A quantitative approach is used to test the reliability of Upper Cretaceous nannofossil bio-events and provides accurate biohorizons for the correlation of δ13C profiles. The Campanian-Maastrichtian boundary (CMB) is identified through the correlation of dinoflagellate biostratigraphy and δ13C stratigraphy between Stevns-1 and the Global boundary Standard Stratotype-section and Point at Tercis les Bains (SW France), allowing the identification of new chemical and biostratigraphic markers that provide a precise placement of the stage boundary on a regional scale. The boundary interval corresponds to the third phase of a stepwise 0.8 ppm negative δ13C excursion, lies in calcareous nannofossil subzone UC16dBP, and encompasses the last occurrence of nannofossil Tranolithus stemmerikii and first occurrence of nannofossil Prediscosphaera mgayae. Fifteen δ13C events are defined and correlated to sixteen reliable nannofossil biohorizons, thus providing a well-calibrated standard high-resolution δ13C curve for the Boreal Realm. Abstract Copyright (2012) Elsevier, B.V.
Year of Publication: 2012
Research Program: DSDP Deep Sea Drilling Project
IPOD International Phase of Ocean Drilling
Key Words: 02 Geochemistry; 12 Stratigraphy, Historical Geology and Paleoecology; Algae; Atlantic Ocean; Biostratigraphy; Biozones; Boreal Realm; C-13/C-12; Campanian; Carbon; Carbonate rocks; Chalk; Correlation; Cretaceous; DSDP Site 525; Danish Basin; Deep Sea Drilling Project; Denmark; Dinoflagellata; Eastern Denmark; Europe; France; IPOD; Isotope ratios; Isotopes; Jutland; Landes France; Leg 74; Maestrichtian; Mesozoic; Microfossils; Morphology; Nannofossils; Nordjylland Denmark; Northwestern Denmark; Palynomorphs; Plantae; Rordal Denmark; Scandinavia; Sedimentary rocks; Senonian; Sjaelland; South Atlantic; Stable isotopes; Stevns-1 core; Tercis les Bains France; Upper Campanian; Upper Cretaceous; Walvis Ridge; Western Europe
Coordinates: N434000 N434000 W0010600 W0010600
N551800 N551800 E0122700 E0122700
N570343 N570343 E0095844 E0095844
Record ID: 2012076524
Copyright Information: GeoRef, Copyright 2019 American Geosciences Institute. Reference includes data from CAPCAS, Elsevier Scientific Publishers, Amsterdam, Netherlands