nerc.ac.uk

A new high-resolution chronology for the late Maastrichtian warming event: establishing robust temporal links with the onset of Deccan volcanism

Barnet, James S.K.; Littler, Kate; Kroon, Dick; Leng, Melanie J.; Westerhold, Thomas; Röhl, Ursula; Zachos, James C.. 2017 A new high-resolution chronology for the late Maastrichtian warming event: establishing robust temporal links with the onset of Deccan volcanism. Geology, 46 (2). 147-150. https://doi.org/10.1130/G39771.1

Before downloading, please read NORA policies.
[img]
Preview
Text (Open Access Paper)
147.pdf - Published Version
Available under License Creative Commons Attribution 4.0.

Download (241kB) | Preview

Abstract/Summary

The late Maastrichtian warming event was defined by a global temperature increase of ∼2.5–5 °C that occurred ∼150–300 k.y. before the Cretaceous-Paleogene (K-Pg) mass extinction. This transient warming event has traditionally been associated with a major pulse of Deccan Traps (west-central India) volcanism; however, large uncertainties associated with radiogenic dating methods have long hampered a definitive correlation. Here we present a new high-resolution, single species, benthic stable isotope record from the South Atlantic, calibrated to an updated orbitally tuned age model, to provide a revised chronology of the event, which we then correlate to the latest radiogenic dates of the main Deccan Traps eruption phases. Our data reveal that the initiation of deep-sea warming coincides, within uncertainty, with the onset of the main phase of Deccan volcanism, strongly suggesting a causal link. The onset of deep-sea warming is synchronous with a 405 k.y. eccentricity minimum, excluding a control by orbital forcing alone, although amplified carbon cycle sensitivity to orbital precession is evident during the greenhouse warming. A more precise understanding of Deccan-induced climate change paves the way for future work focusing on the fundamental role of these precursor climate shifts in the K-Pg mass extinction.

Item Type: Publication - Article
Digital Object Identifier (DOI): https://doi.org/10.1130/G39771.1
ISSN: 0091-7613
Date made live: 19 Dec 2017 13:05 +0 (UTC)
URI: http://nora.nerc.ac.uk/id/eprint/518754

Actions (login required)

View Item View Item

Document Downloads

Downloads for past 30 days

Downloads per month over past year

More statistics for this item...