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Cited by 152Geological and Geochemical AnalysisPaleontology and Stratigraphy of FossilsGeological Studies and Exploration

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The Triassic timescale: new constraints and a review of geochronological data

Mundil, Roland, Pálfy, József, Renne, Paul R., Brack, Peter·2010·Geological Society, London, Special Publications
DOI 10.1144/sp334.3
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Abstract

A review of geochronological data underlying the geological timescale for the Triassic yields a significantly different timescale calibration than that published in the most recent compilation (Geologic TimeScale 2004). This is partly due to the availability of new radio–isotopic data, but mostly because strict selection criteria are applied and complications arising from biases (both systematic and random) are accounted for in this contribution. The ages for the base and the top of the Triassic are constrained by U–Pb ages to 252.3 and 201.5 Ma, respectively. These dates also constrain the ages of major extinction events at the Permian–Triassic and Triassic–Jurassic boundaries, and are statistically indistinguishable from ages obtained for the Siberian Traps and volcanic products from the Central Atlantic Magmatic Province, respectively, suggesting a causal link. Ages for these continental volcanics, however, are mostly from the K–Ar ( 40 Ar/ 39 Ar) system, which requires accounting and correcting for a systematic bias of c . 1% between U–Pb and 40 Ar/ 39 Ar isotopic ages (the 40 Ar/ 39 Ar ages being younger). Robust age constraints also exist for the Induan–Olenekian boundary (251.2 Ma) and the Early–Middle Triassic (Olenekian–Anisian) boundary (247.2 Ma), resulting in a surprisingly short duration of the Early Triassic, which has implications for the timing of biotic recovery and major changes in ocean chemistry during this time. Furthermore, the Anisian–Ladinian boundary…

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Metadata

Authors
Mundil, R., Pálfy, J., Renne, P. R., & Brack, P.
Affiliations
  • Berkeley Geochronology Center (US)
  • Hungarian Natural History Museum (HU)
  • ETH Zurich (CH)
ORCID
Venue
Geological Society, London, Special Publications
Publisher
Geological Society of London
Published
2010-01
Volume
334
Issue
1
Pages
41-60
ISSN
  • 0305-8719 (ISSN-L)
  • 2041-4927
DOI
10.1144/sp334.3
OpenAlex
W2079910917
Cited by
152
References
0
Citations by year
2025: 4 · 2024: 3 · 2023: 2 · 2022: 3 · 2021: 4 · 2020: 10 · 2019: 6 · 2018: 1 · 2017: 13 · 2016: 6 · 2015: 10 · 2014: 11 · 2013: 17 · 2012: 27
FWCI
22.98
Type
journal article
Language
en
Open access
closed
Licence
doi.org/10.15223/policy-002 (stm-asf)
Locations
Geological Society London Special Publications (publishedVersion)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Geochemistry and Petrology › Geological and Geochemical Analysis
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Paleontology and Stratigraphy of Fossils
  • Physical Sciences › Earth and Planetary Sciences › Geology › Geological Studies and Exploration
Keywords
Triassic, geological time scale, geochronology, Permian-Triassic boundary, Triassic-Jurassic boundary, end-Permian mass extinction, Siberian Traps, Central Atlantic Magmatic Province, zircon U-Pb geochronology, 40Ar/39Ar dating, biotic recovery, seawater chemistry

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Mundil, R., Pálfy, J., Renne, P. R., & Brack, P. (2010). The Triassic timescale: new constraints and a review of geochronological data. Geological Society, London, Special Publications. https://doi.org/10.1144/sp334.3