Author:
Al-Suwaidi Aisha H.,Ruhl Micha,Jenkyns Hugh C.,Damborenea Susana E.,Manceñido Miguel O.,Condon Daniel J.,Angelozzi Gladys N.,Kamo Sandra L.,Storm Marisa,Riccardi Alberto C.,Hesselbo Stephen P.
Abstract
AbstractThe Pliensbachian–Toarcian boundary interval is characterized by a ~ 3‰ negative carbon-isotope excursion (CIE) in organic and inorganic marine and terrestrial archives from sections in Europe, such as Peniche (Portugal) and Hawsker Bottoms, Yorkshire (UK). A new high-resolution organic-carbon isotope record, illustrating the same chemostratigraphic feature, is presented from the Southern Hemisphere Arroyo Chacay Melehue section, Chos Malal, Argentina, corroborating the global significance of this disturbance to the carbon cycle. The negative carbon-isotope excursion, mercury and organic-matter enrichment are accompanied by high-resolution ammonite and nannofossil biostratigraphy together with U–Pb CA-ID-TIMS geochronology derived from intercalated volcanic ash beds. A new age of ~ 183.73 + 0.35/− 0.50 Ma for the Pliensbachian–Toarcian boundary, and 182.77 + 0.11/− 0.15 for the tenuicostatum–serpentinum zonal boundary, is assigned based on high-precision U–Pb zircon geochronology and a Bayesian Markov chain Monte Carlo (MCMC) stratigraphic age model.
Funder
Khalifa University of Science, Technology and Research
Shell International Exploration & Production B.V.
Natural Environment Research Council
Consejo Nacional de Investigaciones Científicas y Técnicas
NIGFSC facilities grant
Publisher
Springer Science and Business Media LLC
Cited by
23 articles.
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