Orbital calibration of the late Campanian carbon isotope event in the North Sea

Abstract

A new record of carbon isotopes, nannofossil biostratigraphy, gamma-ray and Fe content variations is presented for the upper Campanian of the Adda-3 core, Danish Central Graben, North Sea. The studied interval provides a revision of previously assigned late Coniacian to early Santonian ages. New biostratigraphic data indicate a late Campanian age for the 60 m thick studied interval. The Late Campanian Event (LCE) is well recorded by a 1.5‰ negative excursion in the bulk δ 13 C, along with two stepwise pre-excursion negative shifts (defining the pre-LCE). The amplitude of the LCE appears higher in the North Sea than in other areas as seen from the correlation to Germany, the UK and France. This correlation allows identification of a new 0.4‰ negative excursion (defined as the conica event). Fe and gamma-ray variations are used to calibrate the record with cyclostratigraphy. Fourteen 405 kyr cycles identified in the upper Campanian of Adda-3 can be correlated to North Germany. The compilation of previous results from North Germany and correlation to Adda-3 shows that the Boreal upper Campanian spans a total of 17 cycles each of 405 kyr; that is, 6.885 myr. The duration of the LCE is estimated to be c . 1 myr at Adda-3 and in North Germany. Supplementary materials: Calibration of the HH-XRF data is available at https://doi.org/10.6084/m9.figshare.c.2134362 .

Coniacian-late Campanian Planktonic Events in the Duwi Formation, Red Sea Region, Egypt

“…Petrizzo [69] discussed unreliability of Globotruncana ventricosa for several reasons and introduced Contusotruncana plummerae as first appearance as zonal marker for tropical and subtropical regions instead of G. ventricosa to first occurrence of Radotruncana calcarata. Besides that, the exact position of G. ventricosa stratigraphically is imprecise [53,70], the Conica Event [29]. Farouk and Faris [59] recorded G. ventricosa over the Globotruncanita elevata in the shallow marine carbonate platform in the Mitla Pass, Northern Sinai.…”

“…This event named the Mid Campanian Event (MCE) [1,3,27] and/or the Conica Event [29] at the base of the upper Campanian and recently as (Trunch event) by…”

“…The Campanian is also characterized by significant fluctuations of the sea level [10,26,27], a major shift in the δ15 N of marine organic matter [28], clay mineralogical changes, and the occurrence of positive and negative carbon isotope events: the Santonian/Campanian Boundary Event (SCBE) [1,27], the Mid Campanian Event (MCE) [1,3,27], the Conica Event [29], the Late Campanian Event (LCE) [1,3,4,5,27], the Epsilon Event (EE) (also called C1-Event) [3,30], and the Campanian/Maastrichtian Boundary Event (CMBE) [3,5,30].…”

Shell chemistry of the Boreal Campanian bivalve <i>Rastellum diluvianum</i> (Linnaeus, 1767) reveals temperature seasonality, growth rates and life cycle of an extinct Cretaceous oyster

“…Unfortunately, these attempts rarely cover the time interval in which the Ivö Klack sediments were deposited (latest Early Campanian; e.g. Wendler, 2013;Perdiou et al, 2016). Given the length of individual magnetochrons, carbon isotope shifts and biozones, the accuracy of dating obtained by strontium isotope dating cannot, at the moment, be matched by the abovementioned integrated stratigraphical approaches (Wagreich et al, 2012).…”

Tectonostratigraphic framework and depositional history of the Cretaceous–Danian succession of the Danish Central Graben (North Sea) – new light on a mature area

“…In the context of the Joint Chalk Research Consortium, nannofossil biostratigraphy has been published for a few wells in the Danish sector of the North Sea (Bailey et al 1999;adopted in Anderskouv & Surlyk 2012). More recently, an integrated biostratigraphic-cyclostratigraphic-isotope stratigraphic approach has been applied to scientific boreholes in the Danish Basin (Ineson et al 2006;Rasmussen & Surlyk 2012;Thibault et al 2012a, b;Surlyk et al 2013) and a well in the Danish Central Graben (Perdiou et al 2015).…”