Globally enhanced Hg concentration and Hg and C isotopes in Permian–Triassic boundary successions: Possible linkage to volcanism
Détails
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Accès restreint UNIL
Etat: Public
Version: Final published version
Licence: Tous droits réservés
Accès restreint UNIL
Etat: Public
Version: Final published version
Licence: Tous droits réservés
ID Serval
serval:BIB_DA6FE61B73DB
Type
Partie de livre
Sous-type
Chapitre: chapitre ou section
Collection
Publications
Institution
Titre
Globally enhanced Hg concentration and Hg and C isotopes in Permian–Triassic boundary successions: Possible linkage to volcanism
Titre du livre
Carbon Isotope Stratigraphy
Editeur
Elsevier
ISBN
9780128209912
ISSN
2468-5178
Statut éditorial
Publié
Date de publication
2020
Peer-reviewed
Oui
Volume
5
Série
Stratigraphy & Timescales
Pages
567-628
Langue
anglais
Résumé
This study presents C and Hg (Hg/TOC) chemostratigraphy data on identified Permian–Triassic successions across the globe with an aim to develop a better understanding on the “mass extinction” event during this time interval. Besides, it would also contribute to the global database on C and Hg stratigraphy and reinforce the application of the latter as a reliable proxy in global correlation, especially in cases of sedimentary sequences deposited coevally with LIP volcanism. In this endeavor, the δ13C chemostratigraphic curves from thousands of kilometers apart from nine classical marine sedimentary sections from various paleolatitudinal zones as well as Hg/TOC stratigraphic pathways of eight of these sections, were examined in a transect across the Pangea supercontinent (~ 252 Ma). A strong negative δ13Ccarb shift at the Late Permian Mass Extinction (LPME), in Meishan D, Guryul Ravine and several other (Permian Triassic Boundary) PTB sections worldwide, is probably due to voluminous CO2 degassing during volcanism in the Siberian Traps Large Igneous Province (STLIP). The C-isotope shift at the LPME is much stronger than in the PTB or Early Triassic Mass Extinction (ETME).
Mots-clé
Guryul Ravine, Meishan, Permian, Triassic boundary, C and Hg chemostratigraphy, C and Hg isotopes
Création de la notice
18/10/2020 8:49
Dernière modification de la notice
06/07/2024 6:05