| Autor: |
Barnet, James S.K., Littler, Katherine, Kroon, Dick, Leng, Melanie J., Westerhold, Thomas, Röhl, Ursula, Zachos, J. C. |
| Přispěvatelé: |
University of St Andrews. School of Earth & Environmental Sciences |
| Jazyk: |
angličtina |
| Rok vydání: |
2017 |
| Předmět: |
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| Zdroj: |
Barnet, J S K, Littler, K, Kroon, D, Leng, M J, Westerhold, T, Röhl, U & Zachos, J C 2017, ' A new high-resolution chronology for the late Maastrichtian warming event: Establishing robust temporal links with the onset of Deccan volcanism ', Geology . https://doi.org/10.1130/G39771.1 |
| DOI: |
10.1130/G39771.1 |
| Popis: |
The new Ocean Drilling Program Site 1262 δ13C and δ18O data were funded by the Natural Environment Research Council Isotope Geosciences Facility at the British Geological Survey (IP-1581–1115). Financial support for this research was provided by the Deutsche Forschungsgemeinschaft (DFG) to Ursula Röhl and Thomas Westerhold. 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 unnderstanding 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. Publisher PDF |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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