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Advances in numerical calibration of the Permian timescale based on radioisotopic geochronology

Jahandar Ramezani and Samuel A. Bowring
Advances in numerical calibration of the Permian timescale based on radioisotopic geochronology (in The Permian timescale, S. G. Lucas (editor) and S. Z. Shen (editor))
Special Publication - Geological Society of London (2018) 450: 51-60


Radioisotopic age determinations targeted at key stratigraphic successions worldwide continue to refine the geological timescale with increasing precision and accuracy and to unravel the tempo of global geological, palaeoclimatic and palaeobiotic processes that have shaped our planet. The last decade has witnessed significant progress in the calibration of the Permian Period through integrated stratigraphic, palaeontological and high-precision geochronological investigations. These studies have largely focused on the Cisuralian and Lopingian stages, particularly the end-Permian mass extinction, whereas much of the Guadalupian and its associated events remain inadequately calibrated. A compilation of the high-precision U-Pb geochronology generated in the past ten years yields ages of 298.92+ or -0.19 Ma for the onset of the Permian, 293.52+ or -0.17 Ma for the base-Sakmarian, 290.10+ or -0.14 Ma for the base-Artinskian, 272.95+ or -0.11 Ma for the Cisuralian-Guadalupian boundary, 265.22+ or -0.34 Ma for the base-Capitanian, 254.14+ or -0.12 Ma for the base-Changhsingian and 251.90+ or -0.10 Ma for the Permian-Triassic boundary. Extension of modern astrochronological methods to the Palaeozoic Era presents new opportunities for broader stratigraphic correlations and enhanced calibration of the Permian timescale.

ISSN: 0305-8719
EISSN: 2041-4927
Serial Title: Special Publication - Geological Society of London
Serial Volume: 450
Title: Advances in numerical calibration of the Permian timescale based on radioisotopic geochronology
Title: The Permian timescale
Author(s): Ramezani, JahandarBowring, Samuel A.
Author(s): Lucas, S. G.editor
Author(s): Shen, S. Z.editor
Affiliation: Massachusetts Institute of Technology, Department of Earth, Atmospheric and Planetary Sciences, Cambridge, MA, United States
Affiliation: New Mexico Museum of Natural History, United States
Pages: 51-60
Published: 2018
Text Language: English
Publisher: Geological Society of London, London, United Kingdom
References: 72
Accession Number: 2018-037287
Categories: GeochronologyStratigraphy
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus.
N20°00'00" - N53°00'00", E74°00'00" - E135°00'00"
N50°00'00" - N80°00'00", W170°00'00" - E60°00'00"
Country of Publication: United Kingdom
Secondary Affiliation: GeoRef, Copyright 2018, American Geosciences Institute. Reference includes data from The Geological Society, London, London, United Kingdom
Update Code: 201809
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