U-Pb geochronology of the Deccan Traps and relation to the end-Cretaceous mass extinction

@article{Schoene2015UPbGO,
  title={U-Pb geochronology of the Deccan Traps and relation to the end-Cretaceous mass extinction},
  author={Blair Schoene and Kyle M. Samperton and Michael P. Eddy and Gerta Keller and Thierry Adatte and Samuel A. Bowring and Syed F.R. Khadri and Brian Gertsch},
  journal={Science},
  year={2015},
  volume={347},
  pages={182 - 184}
}
Dating the influence of Deccan Traps eruptions The Deccan Traps flood basalts in India represent over a million cubic kilometers of erupted lava. These massive eruptions occurred around the same time as the end-Cretaceous mass extinction some 65 million years ago, which famously wiped out all nonavian dinosaurs. Schoene et al. determined the precise timing and duration of the main phase of the eruptions, which lasted over 750,000 years and occurred just 250,000 years before the Cretaceous… Expand
U-Pb constraints on pulsed eruption of the Deccan Traps across the end-Cretaceous mass extinction
TLDR
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. Expand
The eruptive tempo of Deccan volcanism in relation to the Cretaceous-Paleogene boundary
TLDR
It is found that the DT did not erupt in three discrete large pulses and that >90% of DT volume erupted in <1 million years, with ~75% emplaced post-KPB, suggesting that either the release of climate-modifying gases is not directly related to eruptive volume or DT volcanism was not the source of Late Cretaceous climate change. Expand
State shift in Deccan volcanism at the Cretaceous-Paleogene boundary, possibly induced by impact
TLDR
High-precision dating of Deccan Traps volcanic units suggests an increase in volcanism associated with the Chicxulub impact, which suggests postextinction recovery of marine ecosystems was probably suppressed until after the accelerated volcanism waned. Expand
Widespread silicic and alkaline magmatism synchronous with the Deccan Traps flood basalts, India
Abstract Deccan Traps (DT) volcanism and the Chicxulub bolide impact have been suggested as potential triggers of the Cretaceous–Paleogene boundary (KPB) mass extinction. Recently publishedExpand
An evaluation of Deccan Traps eruption rates using geochronologic data
Abstract. Recent attempts to establish the eruptive history of the Deccan Traps large igneous province have used both U−Pb (Schoene et al., 2019) and 40Ar/39Ar (Sprain et al., 2019) geochronology.Expand
The End-Cretaceous Mass Extinction and the Deccan Traps Eruptions
At least three of the five biggest mass extinction events occurred at the same time as flood-basalt eruptions. These were extensive volcanic eruptions that occurred over millions of years. Most ofExpand
Mercury anomaly, Deccan volcanism and the end-Cretaceous Mass Extinction: REPLY
The contribution of the Deccan Traps (west-central India) volcanism in the Cretaceous-Paleogene (KPg) crisis is still a matter of debate. Recent U-Pb dating of zircons interbedded within the DeccanExpand
End-Cretaceous extinction in Antarctica linked to both Deccan volcanism and meteorite impact via climate change
TLDR
Species extinction at Seymour Island occurred in two pulses that coincide with the two observed warming events, directly linking the end-Cretaceous extinction at this site to both volcanic and meteorite events via climate change. Expand
End-Triassic mass extinction started by intrusive CAMP activity
TLDR
New high-precision U-Pb ages from CAMP mafic intrusive units are presented, showing that magmatic activity was occurring ∼100 million years ago before the earliest known eruptions, and indicating that the intrusive record from large igneous provinces may be more important for linking to mass extinctions than the eruptive record. Expand
On the deep-mantle origin of the Deccan Traps
TLDR
A back-and-forth iterative method for time-reversed convection modeling, which incorporates tomography-based, present-day mantle heterogeneity to reconstruct mantle structure at the start of the Cenozoic, shows a very low-density, deep-seated upwelling that ascends beneath the Réunion hot spot at the time of the Deccan eruptions. Expand
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