Upper Campanian-Maastrichtian chronostratigraphy of the Skælskør-1 core, Denmark: correlation at the basinal and global scale and implications for changes in sea-surface temperatures

TY - JOUR

T1 - Upper Campanian-Maastrichtian chronostratigraphy of the Skælskør-1 core, Denmark

T2 - correlation at the basinal and global scale and implications for changes in sea-surface temperatures

AU - Thibault, Nicolas Rudolph

AU - Anderskouv, Kresten

AU - Bjerager, Morten

AU - Boldreel, Lars Ole

AU - Jelby, Mads Engholm

AU - Stemmerik, Lars

AU - Surlyk, Finn

PY - 2015

Y1 - 2015

N2 - The lithostratigraphy, calcareous nannofossil biostratigraphy, carbon- and oxygen-isotope stratigraphy and gamma-ray profile are presented for the Skælskør-1 core, eastern Denmark. The correlation of carbon isotopes to Gubbio (Italy) and ODP Site 762C (Indian Ocean) provides the chronostratigrahical framework of the core through a tie to magnetostratigraphy. Two new carbon-isotope excursions are defined for the uppermost Maastrichtian of the core and prove useful for long-distance correlation. Twenty stratigraphic tie-points are used for correlation of the upper Campanian-Maastrichtian interval by combining carbon-isotope and gamma-ray variations. Significant dissimilarities in the gamma-ray profiles of the Danish Basin cores preclude the sole use of this tool for basin-scale correlations. Bulk oxygen-isotopes and semi-quantitative abundance changes in the warm-water calcareous nannofossil Watznaueria barnesiae and the cool-water Kamptnerius magnificus highlight the following past changes in sea-surface temperatures (SSTs): relatively warm late Campanian SSTs, cooling across the Campanian-Maastrichtian boundary and through the early Maastrichtian, warming across the early-late Maastrichtian transition, cooling in the late Maastrichtian, intense warming in the latest Maastrichtian chron C29r, followed by a very short episode of cooling immediately before the Cretaceous-Palaeogene boundary. The late Campanian-Maastrichtian evolution in sea water temperatures inferred from the Danish Basin is similar to that delineated at tropical latitude oceanic sites.

AB - The lithostratigraphy, calcareous nannofossil biostratigraphy, carbon- and oxygen-isotope stratigraphy and gamma-ray profile are presented for the Skælskør-1 core, eastern Denmark. The correlation of carbon isotopes to Gubbio (Italy) and ODP Site 762C (Indian Ocean) provides the chronostratigrahical framework of the core through a tie to magnetostratigraphy. Two new carbon-isotope excursions are defined for the uppermost Maastrichtian of the core and prove useful for long-distance correlation. Twenty stratigraphic tie-points are used for correlation of the upper Campanian-Maastrichtian interval by combining carbon-isotope and gamma-ray variations. Significant dissimilarities in the gamma-ray profiles of the Danish Basin cores preclude the sole use of this tool for basin-scale correlations. Bulk oxygen-isotopes and semi-quantitative abundance changes in the warm-water calcareous nannofossil Watznaueria barnesiae and the cool-water Kamptnerius magnificus highlight the following past changes in sea-surface temperatures (SSTs): relatively warm late Campanian SSTs, cooling across the Campanian-Maastrichtian boundary and through the early Maastrichtian, warming across the early-late Maastrichtian transition, cooling in the late Maastrichtian, intense warming in the latest Maastrichtian chron C29r, followed by a very short episode of cooling immediately before the Cretaceous-Palaeogene boundary. The late Campanian-Maastrichtian evolution in sea water temperatures inferred from the Danish Basin is similar to that delineated at tropical latitude oceanic sites.

KW - Calcareous nannofossil biostratigraphy

KW - Carbon-isotope stratigraphy

KW - Danish Basin

KW - Oxygen isotopes

KW - Upper Campanian-Maastrichtian

U2 - 10.1111/let.12128

DO - 10.1111/let.12128

M3 - Journal article

AN - SCOPUS:84941933062

SN - 1502-3931

VL - 48

SP - 549

EP - 560

JO - Lethaia: An International Journal of Palaeontology and Stratigraphy

JF - Lethaia: An International Journal of Palaeontology and Stratigraphy

IS - 4

ER -