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U-Pb constraints on pulsed eruption of the Deccan Traps across the end-Cretaceous mass extinction

Journal Article · · Science

Temporal correlation between some continental flood basalt eruptions and mass extinctions has been proposed to indicate causality, with eruptive volatile release driving environmental degradation and extinction. In this work, we tested this model for the Deccan Traps flood basalt province, which, along with the Chicxulub bolide impact, is implicated in the Cretaceous-Paleogene (K-Pg) extinction approximately 66 million years ago. We estimated Deccan eruption rates with uranium-lead (U-Pb) zircon geochronology and resolved four high-volume eruptive periods. According to this model, maximum eruption rates occurred before and after the K-Pg extinction, with one such pulse initiating tens of thousands of years prior to both the bolide impact and extinction. Finally, these findings support extinction models that incorporate both catastrophic events as drivers of environmental deterioration associated with the K-Pg extinction and its aftermath.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1497969
Report Number(s):
LLNL-JRNL--755419; 942423
Journal Information:
Science, Journal Name: Science Journal Issue: 6429 Vol. 363; ISSN 0036-8075
Publisher:
AAASCopyright Statement
Country of Publication:
United States
Language:
English

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Biogenic carbonate mercury and marine temperature records reveal global influence of Late Cretaceous Deccan Traps journal December 2019
No Evidence for a Large Atmospheric CO 2 Spike Across the Cretaceous‐Paleogene Boundary journal March 2019
Stable Isotope Constraints on Marine Productivity Across the Cretaceous‐Paleogene Mass Extinction journal July 2019
Skeleton of a Cretaceous mammal from Madagascar reflects long-term insularity journal April 2020
The driving mechanisms of the carbon cycle perturbations in the late Pliensbachian (Early Jurassic) journal December 2019
238 U/ 235 U measurement in single-zircon crystals: implications for the Hadean environment, magmatic differentiation and geochronology journal January 2019
Rapid ocean acidification and protracted Earth system recovery followed the end-Cretaceous Chicxulub impact journal October 2019
Nature and timing of biotic recovery in Antarctic benthic marine ecosystems following the Cretaceous–Palaeogene mass extinction journal June 2019
Mineralogical evidence for multiple dust sources in an early Triassic loessite journal August 2019
Exceptional continental record of biotic recovery after the Cretaceous–Paleogene mass extinction journal October 2019
On impact and volcanism across the Cretaceous-Paleogene boundary journal January 2020
Nature and Timing of Biotic Recovery in Antarctic Benthic Marine Ecosystems Following the Cretaceous–Paleogene mass Extinction conference January 2019

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